Publication list

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Publication list for
Stephan Sponar
E141 - Atominstitute
as author or essentially involved person

105 records (2004 - 2021)

Publications in Scientific Journals

Authors: N. Geerits, E141-04; Stephan Sponar, E141-04

N. Geerits, St. Sponar:
"Twisting neutral particles with electric fields";
Physical Review A, 103 (2021), 022205-1 - 022205-7.

Authors: Stephan Sponar, E141-04; Armin Danner, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

St. Sponar, A. Danner, M. Ozawa, Y. Hasegawa:
"Neutron optical test of completeness of quantum root-mean-square errors";
npj Quantum Information, 7 (2021), 1 - 6.

Authors: Stephan Sponar, E141-04; Armin Danner, E141-04; V. Pecile; N. Einsidler; Bulent Demirel, E141-04; Yuji Hasegawa, E141-04

St. Sponar, A. Danner, V. Pecile, N. Einsidler, B. Demirel, Y. Hasegawa:
"Experimental test of entropic noise-disturbance uncertainty relations for three-outcome qubit measurements";
Physical Review Research, 3 (2021), 023175-1 - 023175-11.

Authors: Stephan Sponar, E141-04; Rene Sedmik, E141-04; Mario Pitschmann, E141-04; Hartmut Abele, E141-04; Yuji Hasegawa, E141-04

St. Sponar, R. Sedmik, M. Pitschmann, H. Abele, Y. Hasegawa:
"Tests of fundamental quantum mechanics and dark interactions with low-energy neutrons";
Nature Review Physics, 3 (2021), 309 - 327.

Authors: R Wagner; W. Kersten; Armin Danner, E141-04; Hartmut Lemmel, E141-04; A. K. Pan; Stephan Sponar, E141-04

R. Wagner, W. Kersten, A. Danner, H. Lemmel, A. Pan, St. Sponar:
"Direct experimental test of commutation relation via imaginary weak value";
Physical Review Research, 3 (2021), 023243-1 - 023243-7.

Authors: Armin Danner, E141-04; Bulent Demirel, E141-04; Wenzel Kersten, E141-02; Hartmut Lemmel, E141-04; Richard Wagner, E141-04; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

A. Danner, B. Demirel, W. Kersten, H. Lemmel, R. Wagner, St. Sponar, Y. Hasegawa:
"Spin-rotation coupling observed in neutron interferometry";
npj Quantum Information, 6 (2020), 23; 1 - 6.

Authors: Bulent Demirel, E141-04; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

B. Demirel, St. Sponar, Y. Hasegawa:
"Measurements of Entropic Uncertainty Relations in Neutron Optics";
Applied Sciences, 10 (2020), 1 - 19.

Authors: Stephan Sponar, E141-04; Armin Danner, E141-04; K. Obigane; S. Hack; Yuji Hasegawa, E141-04

St. Sponar, A. Danner, K. Obigane, S. Hack, Y. Hasegawa:
"Experimental test of tight state-independent preparation uncertainty relations for qubits";
Physical Review A, 102 (2020), 042204-1 - 042204-9.

Authors: M. Blaickner, E141; Bulent Demirel, E141-04; I. Drevensek-Olenik; M. Fally, Faculty of Physi ...; Peter Flauger, Univ. Wien; Peter Geltenbort, Institut Laue-La ...; Yuji Hasegawa, E141-04; Robin Kurinjimala; M. Licen; C. Pruner, University of Sa ...; Stephan Sponar, E141-04; Y. Tomita, University of El ...; J. Klepp, E141

M. Blaickner, B. Demirel, I. Drevensek-Olenik, M. Fally, P. Flauger, P. Geltenbort, Y. Hasegawa, R. Kurinjimala, M. Licen, C. Pruner, St. Sponar, Y. Tomita, J. Klepp:
"Monte-Carlo simulation of neutron transmission through nanocomposite materials for neutron-optics applications";
Nuclear Instruments & Methods in Physics Research Section A, 916 (2019), 154 - 157.

Authors: Armin Danner, E141-04; Bulent Demirel, E141-04; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

A. Danner, B. Demirel, St. Sponar, Y. Hasegawa:
"Development and perfomance of a miniaturised spin rotator suitable for neutron interferometer experiments";
Journal of Physics Communications, 3 (2019), 1 - 13.

Authors: Bulent Demirel, E141-04; Stephan Sponar, E141-04; Alastair A. Abbott; C. Branciard; Yuji Hasegawa, E141-04

B. Demirel, St. Sponar, A. Abbott, C. Branciard, Y. Hasegawa:
"Experimental test of an entropic measurement uncertainty relation for arbitrary qubit observables";
New Journal of Physics, 21 (2019), 1 - 11.

Authors: W. Kersten; L. Brandl; Richard Wagner, E141-04; Christian Huber, E138-05; Florian Bruckner, E138-05; Yuji Hasegawa, E141-04; Dieter Süss, E138-03; Stephan Sponar, E141-04

W. Kersten, L. Brandl, R. Wagner, C. Huber, F. Bruckner, Y. Hasegawa, D. Süss, St. Sponar:
"Additive-Manufactured and Topology-Optimized Permanent-Magnet Spin Rotator for Neutron Interferometry";
Physical Review Applied, 12 (2019), 014023-1 - 014023-8.

Authors: Richard Wagner, E141-04; L. Brandl; W. Kersten; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04; C. Huber; F. Bruckner; D. Suess

R. Wagner, L. Brandl, W. Kersten, St. Sponar, Y. Hasegawa, C. Huber, F. Bruckner, D. Suess:
"3D printed magnets for neutron spin manipulation";
EPJ Web of Conferences, 219 (2019), 1 - 5.

Authors: Tobias Denkmayr, E141-04; J. Dressel; Hermann Geppert, E141-04; Yuji Hasegawa, E141-04; Stephan Sponar, E141-04

T. Denkmayr, J. Dressel, H. Geppert, Y. Hasegawa, St. Sponar:
"Weak values from strong interactions in neutron interferometry";
Physica B: Condensed Matter, 0 (2018), 1 - 8.

Authors: Hermann Geppert, E141-04; Tobias Denkmayr, E141-04; Stephan Sponar, E141-04; Hartmut Lemmel, E141-04; Tobias Jenke, E141-04; Yuji Hasegawa, E141-04

H. Geppert, T. Denkmayr, St. Sponar, H. Lemmel, T. Jenke, Y. Hasegawa:
"Multifold paths of neutrons in the three-beam interferometer detected by a tiny energy kick";
Physical Review A, 97 (2018), 052111-1 - 052111-7.

Authors: Tobias Denkmayr, E141-04; Hermann Geppert, E141-04; Hartmut Lemmel, E141-04; M. Waegell; J. Dressel; Yuji Hasegawa, E141-04; Stephan Sponar, E141-04

T. Denkmayr, H. Geppert, H. Lemmel, M. Waegell, J. Dressel, Y. Hasegawa, St. Sponar:
"Experimental Demonstration of Direct Path State Characterization by Strongly Measuring Weak Values in a Matter-Wave Interferometer";
Physical Review Letters, 118 (2017), 010402-1 - 010402-5.

Authors: Georg Sulyok; Stephan Sponar, E141-04

G. Sulyok, St. Sponar:
"Heisenberg´s error-disturbance uncertainty relation: Experimental study of competing approaches";
Physical Review A, 96 (2017), 022137-1 - 022137-8.

More information

Authors: M. Waegell; Tobias Denkmayr, E141-04; Hermann Geppert, E141-04; D. Ebner; Tobias Jenke, E141-04; Yuji Hasegawa, E141-04; Stephan Sponar, E141-04; J. Dressel; J. Tollaksen

M. Waegell, T. Denkmayr, H. Geppert, D. Ebner, T. Jenke, Y. Hasegawa, St. Sponar, J. Dressel, J. Tollaksen:
"Confined contextuality in neutron interferometry: Observing the quantum pigeonhole effect";
Physical Review A, 96 (2017), 052131-1 - 052131-8.

Authors: Bulent Demirel, E141-04; Stephan Sponar, E141-04; Georg Sulyok, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

B. Demirel, St. Sponar, G. Sulyok, M. Ozawa, Y. Hasegawa:
"Experimental Test of Residual Error-Disturbance Uncertainty Relations for Mixed Spin-½ States";
Physical Review Letters, 117 (2016), 140402-1 - 140402-5.

Author: Stephan Sponar, E141-04

St. Sponar:
"Error-disturbance uncertainty relations in neutron spin measurements";
International Journal of Quantum Information, 14 (2016), 1 - 10.

Authors: Stephan Sponar, E141-04; Tobias Denkmayr, E141-04; Hermann Geppert, E141-04; Yuji Hasegawa, E141-04

St. Sponar, T. Denkmayr, H. Geppert, Y. Hasegawa:
"Fundamental Features of Quantum Dynamics studied in Matter-Wave Interferometry - Spin Weak Values and the Quantum Cheshire-Cat";
Atoms, 4 (2016), 1 - 15.

Authors: Bulent Demirel, E141-04; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

B. Demirel, St. Sponar, Y. Hasegawa:
"Measurement of the spin-rotation coupling in neutron polarimetry";
New Journal of Physics, 17 (2015), 023065-1 - 023065-7.

Authors: Bulent Demirel, E141-04; Stephan Sponar, E141-04; Georg Sulyok, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

B. Demirel, St. Sponar, G. Sulyok, M. Ozawa, Y. Hasegawa:
"Residual error-disturbance uncertainties in successive spin ½ measurements tested in matter-wave optics";
arxiv:quant-ph, 0 (2015), 1511.03462; 9 pages.

Authors: Stephan Sponar, E141-04; Tobias Denkmayr, E141-04; Hermann Geppert, E141-04; Hartmut Lemmel, E141-04; A. Matzkin; J. Tollaksen; Yuji Hasegawa, E141-04

St. Sponar, T. Denkmayr, H. Geppert, H. Lemmel, A. Matzkin, J. Tollaksen, Y. Hasegawa:
"Weak values obtained in matter-wave interferometry";
Physical Review A, 92 (2015), 062121-1 - 062121-10.

Authors: Georg Sulyok, E141-04; Stephan Sponar, E141-04; Bulent Demirel, E141-04; F. Buscemi; M.J.W. Hall; M. Ozawa; Yuji Hasegawa, E141-04

G. Sulyok, St. Sponar, B. Demirel, F. Buscemi, M. Hall, M. Ozawa, Y. Hasegawa:
"Experimental Test of Entropic Noise-Disturbance Uncertainty Relations for Spin-1/2 Measurements";
Physical Review Letters, 115 (2015), 030401-1 - 030401-6.

Authors: Tobias Denkmayr, E141-04; Hermann Geppert, E141-04; Stephan Sponar, E141-04; Hartmut Lemmel, E141-04; A. Matzkin; J. Tollaksen; Yuji Hasegawa, E141-04

T. Denkmayr, H. Geppert, St. Sponar, H. Lemmel, A. Matzkin, J. Tollaksen, Y. Hasegawa:
"Observation of a quantum Cheshire Cat in a matter-wave interferometer experiment";
Nature Communications, 0 (2014), 1 - 7.

Authors: Hermann Geppert, E141-04; Tobias Denkmayr, E141-04; Stephan Sponar, E141-04; Hartmut Lemmel, E141-04; Yuji Hasegawa, E141-04

H. Geppert, T. Denkmayr, St. Sponar, H. Lemmel, Y. Hasegawa:
"Improvement of the polarized neutron interferometer setup demonstrating violation of a Bell-like inequality";
Nuclear Instruments and Methods in Physics Research A, 763 (2014), 417 - 423.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

J. Klepp, St. Sponar, Y. Hasegawa:
"Fundamental phenomena of quantum mechanics explored with neutron interferometers";
Progress of Theoretical and Experimental Physics, 0 (2014), 082A01.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; C. Schmitzer; H. Bartosik; Katharina Durstberger-Rennhofer, E141-04; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, C. Schmitzer, H. Bartosik, K. Durstberger-Rennhofer, G. Badurek, Y. Hasegawa:
"Tests of alternative quantum theories with neutrons";
AIP Conference Proceedings, 1633 (2014), 41 - 43.

Authors: Stephan Sponar, E141-04; Georg Sulyok, E141-04; Jacqueline Erhart, E141-04; Yuji Hasegawa, E141-04

St. Sponar, G. Sulyok, J. Erhart, Y. Hasegawa:
"Error-disturbance uncertainty relations in neutron-spin measurements";
Advances in High Energy Physics, 2014 (2014), 1 - 6.

Authors: Georg Sulyok, E141-04; Stephan Sponar, E141-04; Jacqueline Erhart, E141-04; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

G. Sulyok, St. Sponar, J. Erhart, G. Badurek, M. Ozawa, Y. Hasegawa:
"Violation of Heisenberg's error-disturbance uncertainty relation in neutron-spin measurements";
Physical Review A, 88 (2013), 022110-1 - 022110-15.

Authors: Jacqueline Erhart, E141-04; Stephan Sponar, E141-04; Georg Sulyok, E141-04; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

J. Erhart, St. Sponar, G. Sulyok, G. Badurek, M. Ozawa, Y. Hasegawa:
"Experimental demonstration of a universally valid error-disturbance uncertainty relation in spin measurements";
Nature Physics, 8 (2012), 185 - 189.

Authors: Yuji Hasegawa, E141-04; C. Schmitzer; H. Bartosik; J. Klepp, E141; Stephan Sponar, E141-04; Katharina Durstberger-Rennhofer, E141-04; Gerald Badurek, E141-04

Y. Hasegawa, C. Schmitzer, H. Bartosik, J. Klepp, St. Sponar, K. Durstberger-Rennhofer, G. Badurek:
"Falsification of Leggett's model using neutron matter waves";
New Journal of Physics, 14 (2012), 023039.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Katharina Durstberger-Rennhofer, E141-04; C. Schmitzer; H. Bartosik; H. Geppert; M. Both; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, K. Durstberger-Rennhofer, C. Schmitzer, H. Bartosik, H. Geppert, M. Both, G. Badurek, Y. Hasegawa:
"High-efficiency manipulations of triply entangled states in neutron polarimetry";
New Journal of Physics, 14 (2012), 053032.

Authors: Yuji Hasegawa, E141-04; Katharina Durstberger-Rennhofer, E141-04; Stephan Sponar, E141-04; Helmut Rauch, E141-04

Y. Hasegawa, K. Durstberger-Rennhofer, St. Sponar, H. Rauch:
"Kochen-Specker theorem studied with neutron interferometer";
Nuclear Instruments and Methods in Physics Research A, 234 (2010), 521 - 524.

More information

Authors: Yuji Hasegawa, E141-04; Rudolf Loidl, E141; Gerald Badurek, E141-04; Katharina Durstberger-Rennhofer, E141-04; Stephan Sponar, E141-04; Helmut Rauch, E141-04

Y. Hasegawa, R. Loidl, G. Badurek, K. Durstberger-Rennhofer, St. Sponar, H. Rauch:
"Engineering of triply entangled states in a single-neutron system";
Physical Review A, 81 (2010), 032121-1-6.

More information

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Katharina Durstberger-Rennhofer, E141-04; Rudolf Loidl, E141; Stefan Filipp, E141; M. Lettner, E141; R. A. Bertlmann; Gerald Badurek, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, K. Durstberger-Rennhofer, R. Loidl, S. Filipp, M. Lettner, R. Bertlmann, G. Badurek, H. Rauch, Y. Hasegawa:
"New aspects of geometric phases in experiments with polarized neutrons";
Journal of Physics A: Mathematical and Theoretical, 43 (2010), 354015.

More information

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Rudolf Loidl, E141; Stefan Filipp, E141; Katharina Durstberger-Rennhofer, E141-04; R. A. Bertlmann; Gerald Badurek, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, R. Loidl, S. Filipp, K. Durstberger-Rennhofer, R. Bertlmann, G. Badurek, H. Rauch, Y. Hasegawa:
"Geometric phase in entangled systems: A single-neutron interferometer experiment";
Physical Review A, 81 (2010), 042113-1-10.

More information

Authors: Stephan Sponar, E141-04; J. Klepp, E141; C. Zeiner; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, C. Zeiner, G. Badurek, Y. Hasegawa:
"Violation of a Bell-like inequality for spin-energy entanglement in neutron polarimetry";
Physics Letters A, 374 (2010), 431 - 434.

Authors: H. Bartosik; J. Klepp, E141; C. Schmitzer; Stephan Sponar, E141-04; Adán Cabello; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

H. Bartosik, J. Klepp, C. Schmitzer, St. Sponar, A. Cabello, H. Rauch, Y. Hasegawa:
"Experimental test of quantum contextuality in neutron interferometry";
Physical Review Letters, 103 (2009), 040403-1 - 040403-4.

Authors: Yuji Hasegawa, E141-04; Gerald Badurek, E141-04; Stefan Filipp, E141; J. Klepp, E141; Rudolf Loidl, E141; Stephan Sponar, E141-04; Helmut Rauch, E141-04

Y. Hasegawa, G. Badurek, S. Filipp, J. Klepp, R. Loidl, St. Sponar, H. Rauch:
"Entanglement between degrees of freedom of single-neutrons";
Nuclear Instruments and Methods in Physics Research A, 611 (2009), 310 - 313.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Stefan Filipp, E141; M. Lettner, E141; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

J. Klepp, St. Sponar, S. Filipp, M. Lettner, G. Badurek, Y. Hasegawa:
"Observation of Nonadditive Mixed-State Phases with Polarized Neutrons";
Physical Review Letters, 101 (2008), 150404; 150404-1 - 150404-4.

More information

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, G. Badurek, Y. Hasegawa:
"Zero-field and Larmor spinor precessions in a neutron polarimeter experiment";
Physics Letters A, 372 (2008), 3153 - 3156.

More information

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Rudolf Loidl, E141; Stefan Filipp, E141; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04; Helmut Rauch, E141-04

St. Sponar, J. Klepp, R. Loidl, S. Filipp, G. Badurek, Y. Hasegawa, H. Rauch:
"Coherent energy manipulation in single-neutron interferometry";
Physical Review A, 78 (2008), 061604; 061604-1 - 061604-4.

More information

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Yuji Hasegawa, E141-04; Erwin Jericha, E141-04; Gerald Badurek, E141-04

St. Sponar, J. Klepp, Y. Hasegawa, E. Jericha, G. Badurek:
"Non-Cyclic Geometric Phases in Mixed State Neutron Polarimetry";
Acta Phys. Hung. B, 26 (2006), 1-2; 165 - 171.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04; Erwin Jericha, E141-04; Gerald Badurek, E141-04

J. Klepp, St. Sponar, Y. Hasegawa, E. Jericha, G. Badurek:
"Noncyclic Pancharatnam phase for mixed state SU(2) evolution in neutron polarimetry";
Physics Letters A, 342 (2005), 48 - 52.

Authors: Martin Zehetmayer, E141-06; Michael Eisterer, E141-06; Stephan Sponar, E141-04; Harald W. Weber, E141-06; A. Wisniewski; R. Puzniak; P. Panta; J. Karpinski

M. Zehetmayer, M. Eisterer, St. Sponar, H. W. Weber, A. Wisniewski, R. Puzniak, P. Panta, J. Karpinski:
"Magnetic properties of superconducting HgBa₂CuO_4+δ single crystals in the overdoped state before and after particle irradiation ";
Physica C: Superconductivity and its Applications, 418 (2005), 73 - 86.

Contributions to Books

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Stefan Filipp, E141; M. Lettner, E141; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

J. Klepp, St. Sponar, S. Filipp, M. Lettner, G. Badurek, Y. Hasegawa:
"Nonadditive mixed state phase in neutron optics";
in: "Foundations of Probability and Physics - 5", American Institute of Physics, New York, 2009, ISBN: 978-0-7354-0636-0, 314 - 318.

Contributions to Proceedings

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Rudolf Loidl, E141; Katharina Durstberger-Rennhofer, E141-04; H. Geppert; Gerald Badurek, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, R. Loidl, K. Durstberger-Rennhofer, H. Geppert, G. Badurek, H. Rauch, Y. Hasegawa:
"Triple Entanglement in Neutron Interferometric and Polarimetric Experiments";
in: "5th European Conference on Neutron Scattering", Journal of Physics: Conference Series, 2012, 012044-1 - 012044-16.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Stefan Filipp, E141; M. Lettner, E141; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

J. Klepp, St. Sponar, S. Filipp, M. Lettner, G. Badurek, Y. Hasegawa:
"Nonadditivity of Quantum Phases for mixed States";
in: "Proceedings of the Junior Scientist Conference 2008", Vienna University of Technology, Wien, 2008, ISBN: 978-3-200-01612-5, 129 - 130.

More information

Authors: Erwin Jericha, E141-04; Gerald Badurek, E141-04; Matthias Baron, E141; Yuji Hasegawa, E141-04; M.R. Jäkel, E141; J. Klepp, E141; A. Rofner, E141; Stephan Sponar, E141-04; M. Trinker, E141; Mario Villa, E141-05; Helmut Rauch, E141-04

E. Jericha, G. Badurek, M. Baron, Y. Hasegawa, M. Jäkel, J. Klepp, A. Rofner, St. Sponar, M. Trinker, M. Villa, H. Rauch:
"Neutron Optics Experiments at the TRIGA Mark II reactor of the Atominstitut Wien";
in: "CD-Proc. of the 2nd World Triga Users Conference", issued by: Atominstitut Vienna; Vienna University of Technology, 2004, 8 pages.

Talks and Poster Presentations (with Proceedings-Entry)

Author: Stephan Sponar, E141-04

St. Sponar:
"Experimental Demonstration of direct Path State Characterization by strongly measuring Weak Values in Neutron Interferometry";
Talk: International Conference on Neutron Scattering (ICNS 2017), Dajon, South Korea; 2017-07-09 - 2017-07-13; in: "Proceedings ICNS 2017", (2017).

Talks and Poster Presentations (without Proceedings-Entry)

Authors: Armin Danner, E141-04; K. Obigane; N. Geerits, E141-04; Hartmut Lemmel, E141-04; Richard Wagner, E141-04; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

A. Danner, K. Obigane, N. Geerits, H. Lemmel, R. Wagner, St. Sponar, Y. Hasegawa:
"Three path quantum Cheshire Cat observed in neutron interferometry";
Keynote Lecture: ÖPG-SPS Jahrestagung 2021, Innsbruck, Austria; 2021-09-01.

Author: Stephan Sponar, E141-04

St. Sponar:
"Particle and Quantum Physics with Neutrons studied at the Atominstitut";
Keynote Lecture: FAKT Workshop 2020: Particle Physics Retreat, Semmering, Austria (invited); 2020-02-27 - 2020-02-28.

Author: Stephan Sponar, E141-04

St. Sponar:
"Measurement Uncertainty Relations studied in Neutron Optics";
Keynote Lecture: Quantum Frontiers & Fundamentals (2020), Bangalore, India; 2020-01-13 - 2020-01-18.

Author: Stephan Sponar, E141-04

St. Sponar:
"Neutron interferometry: past, present and future";
Keynote Lecture: Problems of Theoretical and Mathematical Physics (2019), Kyiv, Ukraine (invited); 2019-09-23 - 2019-09-27.

Author: Stephan Sponar, E141-04

St. Sponar:
"Measurement Uncertainty Relations studied in Neutron Optics";
Keynote Lecture: Quantum Africa 5 (2019), Cape Town, South Africa; 2019-09-01 - 2019-09-06.

Author: Stephan Sponar, E141-04

St. Sponar:
"Quantum Correlations, Weak Values & Which-Way Measurements studied in Neutron Interferometry";
Keynote Lecture: Joint Annual Meeting OePG / SPG 2019, Zurich, Swiss (invited); 2019-08-28 - 2019-08-30.

Author: Stephan Sponar, E141-04

St. Sponar:
"Weak and Which-Way Measurements studied in Neutron Interferometry";
Keynote Lecture: European Conference on Neutron Scattering (ENCNS)(2019), St. Petersburg, RUS; 2019-07-03 - 2019-07-05.

Author: Stephan Sponar, E141-04

St. Sponar:
"Measurement Uncertainty Relations and Which-Way Experiments studied in Neutron Optics";
Keynote Lecture: Time and fundamentals of quantum mechanics 2019, Jerusalem, Israel; 2019-01-28 - 2019-01-31.

Authors: Armin Danner, E141-04; Bulent Demirel, E141-04; W. Kersten; Hartmut Lemmel, E141-04; Stephan Sponar, E141-04; Richard Wagner, E141-04; Yuji Hasegawa, E141-04

A. Danner, B. Demirel, W. Kersten, H. Lemmel, St. Sponar, R. Wagner, Y. Hasegawa:
"Observation of Spin-Rotation Coupling in Neutron Optics";
Keynote Lecture: 681. WE-Heraeus-Seminar on Particle Physics with Cold and Ultra-Cold Neutrons (2018), Bad Honnef, Germany; 2018-10-24 - 2018-10-26.

Author: Stephan Sponar, E141-04

St. Sponar:
"Weak Measurements and Weak Values studied in Neutron Interferometry";
Keynote Lecture: Polarised Neutrons for Condensed-Matter (PNCMI 2018), Abingdon, UK; 2018-07-03 - 2018-07-06.

Author: Stephan Sponar, E141-04

St. Sponar:
"Weak Measurements and Weak Values studied in Neutron Interferometry";
Keynote Lecture: International Workshop on Particle Physics at Neutron Sources, PPNS-2018, Grenoble, France; 2018-05-24 - 2018-05-26.

Authors: Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

St. Sponar, Y. Hasegawa:
"Weak Values & Quantum Paradoxes: Experimental Studies in Neutron Optics";
Keynote Lecture: AAV Anniversary Conference - Celebrating 30 Years of Weak Values, Chapman University, CA, USA (invited); 2018-04-01 - 2018-04-04.

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Author: Stephan Sponar, E141-04

St. Sponar:
"Measurement Uncertainty Relations: operator-based, operational & information-theoretic approaches studied in Neutron Optics";
Talk: 3rd International Conference Quantum Foundations 2017 (ICQF17), Patna, India (invited); 2017-12-04 - 2017-12-09.

Authors: Wilfried Mach, E141-04; Hartmut Abele, E141-04; Hanno Filter, E141-04; Yuji Hasegawa, E141-04; Tobias Jenke, E141-04; Hartmut Lemmel, E141-04; Erwin Jericha, E141-04; Gertrud Konrad, E141-04; Stephan Sponar, E141-04; Mario Villa, E141-05; Michael Zawisky, E141-04

W. Mach, H. Abele, H. Filter, Y. Hasegawa, T. Jenke, H. Lemmel, E. Jericha, G. Konrad, St. Sponar, M. Villa, M. Zawisky:
"Current projects at the Atominstitut";
Poster: NuPECC meeting Mini Workshop Wien (2016), ÖAW, Wien (invited); 2016-10-07.

Author: Stephan Sponar, E141-04

St. Sponar:
"Weak Measurement studied in Neutron Optics";
Talk: Workshop on Matter-Wave Interferometry (2016), Maryland, USA (invited); 2016-09-30 - 2016-10-02.

Authors: Wilfried Mach, E141-04; Hartmut Abele, E141-04; Hanno Filter, E141-04; Yuji Hasegawa, E141-04; Erwin Jericha, E141-04; Gertrud Konrad, E141-04; Stephan Sponar, E141-04; Mario Villa, E141-05; Michael Zawisky, E141-04

W. Mach, H. Abele, H. Filter, Y. Hasegawa, E. Jericha, G. Konrad, St. Sponar, M. Villa, M. Zawisky:
"Current projects at the Atominstitut";
Poster: Symposium "Future Possible Use of Neutron and Synchrotron Sources", Graz; 2016-09-15 - 2016-09-16.

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Author: Stephan Sponar, E141-04

St. Sponar:
"Error-Disturbance Uncertainty Relations studied in Neutron Optics";
Poster: Nesy Symposium (2016), TU Graz, Austria; 2016-09-15 - 2016-09-16.

Author: Stephan Sponar, E141-04

St. Sponar:
"Measurement - Disturbance Uncertainty Relations studied in Neutron Optics";
Talk: International Conference on Quantum Foundations 2015 (ICQF15), Patna, India (invited); 2015-11-30 - 2015-12-04.

Author: Stephan Sponar, E141-04

St. Sponar:
"Measurement - Disturbance Uncertainty Relations studied in Neutron Optics";
Keynote Lecture: VI European Conference On Neutron Scattering (ECNS2015), Zaragoza, Spain; 2015-08-30 - 2015-09-04.

Author: Stephan Sponar, E141-04

St. Sponar:
"Error-Disturbance Uncertainty Relations studies in Neutron Optics";
Keynote Lecture: Quantum Theorie: from foundations to technology, Växjö, Sweden; 2015-06-08 - 2015-06-11.

Author: Stephan Sponar, E141-04

St. Sponar:
"Error-disturbance uncertainty relations and the quantum Cheshire Cat studied in neutron optical experiments";
Keynote Lecture: Frontiers in Matter Wave Optics, Kreta, Griechenland; 2014-10-06 - 2014-10-10.

Author: Stephan Sponar, E141-04

St. Sponar:
"Uncertainty Relations and Quantum Cheshire Cats studied in Neutron Optics";
Keynote Lecture: Quantum Africa 3 "Advances in Quantum Sciences", Rabat, Maroko; 2014-09-22 - 2014-09-26.

Authors: Tobias Denkmayr; Hermann Geppert, E141-04; Georg Sulyok, E141-04; B. Demirel; Jacqueline Erhart, E141-04; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04

T. Denkmayr, H. Geppert, G. Sulyok, B. Demirel, J. Erhart, St. Sponar, Y. Hasegawa:
"Quantum Cheshire-Cat and uncertainty relation studied with neutrons";
Poster: Quantum [Un]Speakables II: 50 Years of Bell's Theorem, Vienna, Austria; 2014-06-19 - 2014-06-22.

Authors: Stephan Sponar, E141-04; Tobias Denkmayr; Jacqueline Erhart, E141-04; Hermann Geppert, E141-04; Hartmut Lemmel, E141-04; A. Matzkin; Georg Sulyok, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

St. Sponar, T. Denkmayr, J. Erhart, H. Geppert, H. Lemmel, A. Matzkin, G. Sulyok, M. Ozawa, Y. Hasegawa:
"Neutron optical Measurements studying Quantum Mechanics";
Keynote Lecture: GRANIT 2014-Workshop, Les Houches, France; 2014-03-02 - 2014-03-07.

Authors: Stephan Sponar, E141-04; Georg Sulyok, E141-04; Jacqueline Erhart, E141-04; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

St. Sponar, G. Sulyok, J. Erhart, G. Badurek, M. Ozawa, Y. Hasegawa:
"Violation of Heisenberg's Error-Disturbance Uncertainty Relation in Neutron Spin Measurements";
Poster: International Conference on Neutron Scattering ICNS2013, Edinburgh, GB; 2013-07-09 - 2013-07-14.

Author: Stephan Sponar, E141-04

St. Sponar:
"Error-Disturbance Uncertainty Relations in Spin Measurements";
Keynote Lecture: Fourth Nagoya Winter Workshop on Quantum Information 2013, Nagoya, Japan; 2013-02-14 - 2013-03-01.

Authors: Stephan Sponar, E141-04; Georg Sulyok, E141-04; Jacqueline Erhart, E141-04; J. Klepp; C. Schmitzer; H. Geppert; Katharina Durstberger-Rennhofer, E141-04; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

St. Sponar, G. Sulyok, J. Erhart, J. Klepp, C. Schmitzer, H. Geppert, K. Durstberger-Rennhofer, G. Badurek, M. Ozawa, Y. Hasegawa:
"Foundations of Quantum Mechanics explored with Neutrons";
Talk: Quantum Africa 2, Mont aux Sources Hotel, Northern Drakensberg, Südafrika; 2012-09-03 - 2012-09-07.

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Authors: Stephan Sponar, E141-04; J. Klepp, E141; Rudolf Loidl, E141; C. Schmitzer; H. Bartosik; Katharina Durstberger-Rennhofer, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, R. Loidl, C. Schmitzer, H. Bartosik, K. Durstberger-Rennhofer, H. Rauch, Y. Hasegawa:
"Alternative Theories of Quantum Mechanics studied with Neutrons";
Poster: QCMC 2012, Vienna, Austria; 2012-07-30 - 2012-08-03.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; C. Schmitzer; H. Bartosik; Katharina Durstberger-Rennhofer, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, C. Schmitzer, H. Bartosik, K. Durstberger-Rennhofer, H. Rauch, Y. Hasegawa:
"Tests of alternative quantum theories with neutrons";
Poster: QCMC 2012 Intl. Conference on Quantum Communication, Measurement and Computing, Wien; 2012-07-30 - 2012-08-03.

Authors: Stephan Sponar, E141-04; Hartmut Lemmel, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, H. Lemmel, H. Rauch, Y. Hasegawa:
"Foundations of Quantum Mechanics explored with Neutrons";
Poster: Science & Scientists @ ESS 2012, Berlin, Germany; 2012-04-19 - 2012-04-20.

Authors: Yuji Hasegawa, E141-04; Katharina Durstberger-Rennhofer, E141-04; Daniel Erdösi, E141-04; J. Erhardt, E141-04; J. Klepp, E141; Hartmut Lemmel, E141-04; Stephan Sponar, E141-04; Georg Sulyok, E141-04; Helmut Rauch, E141-04

Y. Hasegawa, K. Durstberger-Rennhofer, D. Erdösi, J. Erhardt, J. Klepp, H. Lemmel, St. Sponar, G. Sulyok, H. Rauch:
"Foundation of Quantum Mechanics Explored with Neutrons";
Poster: 5th European Conference on Neutron Scattering, Prague, Czech Republic; 2011-07-17 - 2011-07-22.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Rudolf Loidl, E141; Stefan Filipp, E141; Daniel Erdösi, E141-04; Katharina Durstberger-Rennhofer, E141-04; R. A. Bertlmann; Gerald Badurek, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, R. Loidl, S. Filipp, D. Erdösi, K. Durstberger-Rennhofer, R. Bertlmann, G. Badurek, H. Rauch, Y. Hasegawa:
"Multi-Entanglement in Neutron Interferometry Experiments";
Talk: 5th European Conference on Neutron Scattering, Prague, Czech Republic; 2011-07-17 - 2011-07-22.

Authors: Katharina Durstberger-Rennhofer, E141-04; C. Schmitzer; H. Bartosik; J. Klepp; Stephan Sponar, E141-04; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

K. Durstberger-Rennhofer, C. Schmitzer, H. Bartosik, J. Klepp, St. Sponar, G. Badurek, Y. Hasegawa:
"Falsification of Leggett's model using neutron matter waves";
Talk: Jahrestagung der ÖPG, Lausanne, Switzerland; 2011-06-15.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; C. Schmitzer; H. Bartosik; M. Both; H. Geppert; Katharina Durstberger-Rennhofer, E141-04; Gerald Badurek, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, C. Schmitzer, H. Bartosik, M. Both, H. Geppert, K. Durstberger-Rennhofer, G. Badurek, Y. Hasegawa:
"Entanglement in Neutron Poarimetric Experiments";
Talk: ÖPG Jahrestagung 2011, Lausanne, Switzerland; 2011-06-15.

Authors: Jacqueline Erhart, E141-04; Stephan Sponar, E141-04; Georg Sulyok, E141-04; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

J. Erhart, St. Sponar, G. Sulyok, G. Badurek, M. Ozawa, Y. Hasegawa:
"A universally valid uncertainty relation demonstrated by successive spin-measurements";
Poster: 2011 Einsteins in the City, New York, USA; 2011-04-14 - 2011-04-15.

Authors: Jacqueline Erhart, E141-04; Stephan Sponar, E141-04; Georg Sulyok, E141-04; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

J. Erhart, St. Sponar, G. Sulyok, G. Badurek, M. Ozawa, Y. Hasegawa:
"Experimental confirmation of a universally valid uncertainty relation for error and disturbance in spin-measurements";
Poster: NESY Winterschool, Planneralm, Austria; 2011-03-06 - 2011-03-12.

Authors: Jacqueline Erhart, E141-04; Stephan Sponar, E141-04; Georg Sulyok, E141-04; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

J. Erhart, St. Sponar, G. Sulyok, G. Badurek, M. Ozawa, Y. Hasegawa:
"Experimental confirmation of a universally valid uncertainty relation for error and disturbance in spin-measurements";
Poster: 14. Deutsche Physikerinnentagung 2010, München, Germany; 2010-11-04 - 2010-11-07.

Authors: Jacqueline Erhart, E141-04; Stephan Sponar, E141-04; G. Sulyok; Gerald Badurek, E141-04; M. Ozawa; Yuji Hasegawa, E141-04

J. Erhart, St. Sponar, G. Sulyok, G. Badurek, M. Ozawa, Y. Hasegawa:
"Experimental confirmation of a universally valid uncertainty relation for error and disturbance in spin-measurements";
Poster: 60. Jahrestagung der Österreichischen Physikalischen Gesellschaft (ÖPG), Salzburg; 2010-09-07.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; S. Fillip; Rudolf Loidl, E141; Katharina Durstberger-Rennhofer, E141-04; R. A. Bertlmann; Yuji Hasegawa, E141-04; Gerald Badurek, E141-04; Helmut Rauch, E141-04

St. Sponar, J. Klepp, S. Fillip, R. Loidl, K. Durstberger-Rennhofer, R. Bertlmann, Y. Hasegawa, G. Badurek, H. Rauch:
"Berry Phase in Entangled Systems: A Single-Neutron Interferometer Experiment";
Talk: 16. Meeting Nonlocal Seminar, Vienna, Austria; 2009-07-01.

Authors: Yuji Hasegawa, E141-04; Gerald Badurek, E141-04; J. Klepp, E141; Rudolf Loidl, E141; Stephan Sponar, E141-04; Helmut Rauch, E141-04

Y. Hasegawa, G. Badurek, J. Klepp, R. Loidl, St. Sponar, H. Rauch:
"Neutron as a quantum system: exploring multi-entanglement in a single-neutron system";
Poster: 3rd Vienna symposium on the Foundation of Modern Physics, Wien; 2009-06-11 - 2009-06-14.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; H. Bartosik; Stefan Filipp, E141; Helmut Rauch, E141-04; C. Schmitzer; Yuji Hasegawa, E141-04

J. Klepp, St. Sponar, H. Bartosik, S. Filipp, H. Rauch, C. Schmitzer, Y. Hasegawa:
"Quantum eraser and complementarity in neutron optics";
Poster: 3rd Vienna symposium on the Foundation of Modern Physics, Wien; 2009-06-11 - 2009-06-14.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Rudolf Loidl, E141; Stefan Filipp, E141; Katharina Durstberger-Rennhofer, E141-04; R. A. Bertlmann; Yuji Hasegawa, E141-04; Helmut Rauch, E141-04

St. Sponar, J. Klepp, R. Loidl, S. Filipp, K. Durstberger-Rennhofer, R. Bertlmann, Y. Hasegawa, H. Rauch:
"Berry phase in entangled system: a single-neutron interferometer experiment";
Poster: 3rd Vienna symposium on the Foundation of Modern Physics, Wien; 2009-06-11 - 2009-06-14.

Authors: Yuji Hasegawa, E141-04; Gerald Badurek, E141-04; Stefan Filipp, E141; J. Klepp, E141; Rudolf Loidl, E141; Stephan Sponar, E141-04; Helmut Rauch, E141-04

Y. Hasegawa, G. Badurek, S. Filipp, J. Klepp, R. Loidl, St. Sponar, H. Rauch:
"Multi-entanglement in a single-neutron system";
Poster: 4th American Conference on Neutron Scattering (ACNS2008), Santa Fe, USA; 2008-05-11 - 2008-05-15.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Gerald Badurek, E141-04; Stefan Filipp, E141; Erwin Jericha, E141-04; M. Leitner, E141; Yuji Hasegawa, E141-04

J. Klepp, St. Sponar, G. Badurek, S. Filipp, E. Jericha, M. Leitner, Y. Hasegawa:
"Observation of mixed state phase using neutron polarimetry";
Talk: Fachausschusstagung, ÖPG, Kern- und Teilchenphysik, Schloss Haindorf/Langenlois; 2007-09-25.

Authors: Rudolf Loidl, E141; J. Klepp, E141; Stephan Sponar, E141-04; Stefan Filipp, E141; Gerald Badurek, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

R. Loidl, J. Klepp, St. Sponar, S. Filipp, G. Badurek, H. Rauch, Y. Hasegawa:
"Violation of Mermnin´s inequality for GHZ states in neutron interferometry";
Talk: Fachausschusstagung, ÖPG, Kern- und Teilchenphysik, Schloss Haindorf/Langenlois; 2007-09-25.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Stefan Filipp, E141; Gerald Badurek, E141-04; Helmut Rauch, E141-04; Yuji Hasegawa, E141-04

St. Sponar, J. Klepp, S. Filipp, G. Badurek, H. Rauch, Y. Hasegawa:
"Coherent manipulationfor multi-entanglement of neutrons";
Talk: Fachausschusstagung, ÖPG, Kern- und Teilchenphysik, Schloss Haindorf/Langenlois; 2007-09-25.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04; Stefan Filipp, E141; M. Lettner, E141; Erwin Jericha, E141-04; Gerald Badurek, E141-04

J. Klepp, St. Sponar, Y. Hasegawa, S. Filipp, M. Lettner, E. Jericha, G. Badurek:
"Observation of geometric mixed state phase using neutron polarimetry";
Poster: Quantum Mechanics: From Fundamental Problems to Applications, Bertinoro (Italy); 2006-12-05.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Yuji Hasegawa, E141-04; Erwin Jericha, E141-04; Gerald Badurek, E141-04

St. Sponar, J. Klepp, Y. Hasegawa, E. Jericha, G. Badurek:
"Non-cyclic geometric phases in mixed state neutron polarimetry";
Poster: 13th European Workshop on Quantum Optics, Wien; 2006-05-23 - 2006-05-27.

Authors: Stephan Sponar, E141-04; J. Klepp, E141; Yuji Hasegawa, E141-04; Erwin Jericha, E141-04; Gerald Badurek, E141-04

St. Sponar, J. Klepp, Y. Hasegawa, E. Jericha, G. Badurek:
"Noncyclic mixed state phase in SU(2) neutron polarimetric experiments";
Poster: 55. Jahrestagung der Österr. Physikalischen Gesellschaft, Univ. Wien (Österreich); 2005-09-27 - 2005-09-29.

Authors: J. Klepp, E141; Stephan Sponar, E141-04; Yuji Hasegawa, E141-04; Erwin Jericha, E141-04; Gerald Badurek, E141-04

J. Klepp, St. Sponar, Y. Hasegawa, E. Jericha, G. Badurek:
"Noncyclic mixed state phase in SU(2) neutron polarimetry";
Poster: 54. Jahrestagung der Österr. Physikalischen Gesellschaft (ÖPG), Linz (Österreich); 2004-09-28 - 2004-09-30.

Authors: Erwin Jericha, E141-04; Gerald Badurek, E141-04; Matthias Baron, E141; Yuji Hasegawa, E141-04; M.R. Jäkel, E141; J. Klepp, E141; A. Rofner, E141; Stephan Sponar, E141-04; M. Trinker, E141; Mario Villa, E141-05; Helmut Rauch, E141-04

E. Jericha, G. Badurek, M. Baron, Y. Hasegawa, M. Jäkel, J. Klepp, A. Rofner, St. Sponar, M. Trinker, M. Villa, H. Rauch:
"Neutron Optics Experiments at the TRIGA Mark II reactor of the Atominstitut Wien";
Talk: 2nd World TRIGA Users Conf., TU Wien (Österreich); 2004-09-15 - 2004-09-18.

Doctor's Theses (authored and supervised)

Author: Stephan Sponar, E141-04
Other person involved: Yuji Hasegawa, E141-04

St. Sponar:
"Multi-Entanglement in Neutron Interferometric and Polarimetric Experiments";
Supervisor, Reviewer: Y. Hasegawa; Atominstitut, 2011; oral examination: 2011-03-16.

Diploma and Master Theses (authored and supervised)

Author: Stephan Sponar, E141-04
Other person involved: Gerald Badurek, E141-04

St. Sponar:
"Noncyclic Geometric Phases in Neutron Polarimetric Experiments";
Supervisor: G. Badurek; Atominstitut d. Österr. Universitäten, 2004.