January 24, 2016 4:21 pm Published by
2019””’ 2018””’ 2017””’ 2016””’ 2015””’ 2014””’ 2013””’ 2012””’ 2011””’ 2010””’ 2009””’ 2008    
important publications between 2001 and 2007
selected publications with historical relevance between 1974 and 2000

emty line


N. Geerits, H. Lemmel, A. S. Berger, and S. Sponar, Phase Vortex Lattices in Neutron Interferometry,  Communications Physics 6, 209 (2023) or arXiv:2205.00536 [quant-ph].

E. Kreuzgruber, R. Wagner, N. Geerits, H. Lemmel, and S. Sponar, Violation of a Leggett–Garg inequality using ideal negative measurements in neutron interferometry, arXiv:2307.04409 [quant-ph].

A. Danner, H. Lemmel, R. Wagner, S. Sponar, and Y. Hasegawa, Neutron Interferometer Experiments Studying Fundamental Features of Quantum MechanicsAtoms 11, 98 (2023).

A. Danner, N. Geerits, H. Lemmel, R. Wagner, S. Sponar, and Yuji Hasegawa, Three-Path Quantum Cheshire Cat Observed in Neutron Interferometry, arXiv:2303.18092 [quant-ph].

R. Wagner, W. Kersten, H. Lemmel, S. Sponar, and Y. Hasegawa, Quantum causality emerging in a delayed‐choice quantum Cheshire Cat experiment with neutronsScientific Reports 13, 3865 (2023).


H. Lemmel, M. Jentschel, H. Abele, F. Lafont, Guerard, C. P. Sasso, G. Manac and E. Massa, Neutron interference from a split-crystal interferometerJ. Appl. Cryst. 55, 870-875 (2022).

H. Lemmel, N. Geerits, A. Danner, H. F. Hofmann, and S. Sponar, Quantifying the presence of a neutron in the paths of an interferometerPhysical Review Research 4, 023075 (2022) or arXiv:2202.00272 [quant-ph] or


R. Wagner, W. Kersten, A. Danner, H. Lemmel, A. Kumar Pan, and S. Sponar, Direct experimental test of commutation relation via imaginary weak valuePhysical Review Research 3, 023243 (2021) or arXiv:2012.08171 [quant-ph].

S. Sponar, A. Danner, M. Ozawa, and Y. Hasegawa, Neutron Optical Test of Completeness of Quantum Root-Mean-Square Errors, npj Quantum Information 7, 106 (2021) or arXiv:2009.06418 [quant-ph].

S. Sponar, A. Danner, V. Pecile, N. Einsidler, B. Demirel, and Y. Hasegawa, Experimental Test of Entropic Noise-Disturbance Uncertainty Relations for Three-Outcome Qubit MeasurementsPhysical Review Research 3, 023175 (2021) or arXiv:2005.13410 [quant-ph].

S. Sponar, R. I. P. Sedmik, M. Pitschmann, H. Abele, and Y. Hasegawa, Tests of fundamental quantum mechanics and dark interactions with low-energy neutronsNature Reviews Physics 3, 309 – 327 (2021), DIO: 10.1038/s42254-021-00298-2, Extended Vers. [quant-ph/2012.09048].

Niels Geerits and Stephan Sponar, Twisting Neutral Particles with Electric FieldsPhysical Review A 103, 022205 (2021)
or arXiv:2007.03345 [quant-ph].


S. Sponar, A. Danner, K. Obigane, S. Hack, and Y. Hasegawa, Experimental Test of Tight State-Independent Preparation Uncertainty Relations for Qubits, Physical Review A 102, 042204 (2020) or [quant-ph/2002.10725].

A. Danner, B. Demirel, W. Kersten, H. Lemmel, R. Wagner, S. Sponar, and Y. Hasegawa, Spin-rotation coupling observed in neutron interferometrynpj Quantum Information 6, 23 (2020) or [quant-ph/1904.07085].

B. Demirel, S. Sponar, and Y. Hasegawa, Measurements of Entropic Uncertainty Relations in Neutron Optics,
Applied Science 10, 1087 (2020).

M. Willsch, D. Willsch, K. Michielsen, F. Jin, T. Denkmayr, S. Sponar, Y. Hasegawa, and H. De Raedt, Long-Time Correlations in Single-Neutron Interferometry DataJournal of the Physical Society of Japan 89, 064005 (2020).


S. Sponar, H. Geppert-Kleinrath, T. Denkmayr, H. Lemmel, and Y. Hasegawa, Asking Neutrons where they have been,
J. Phys.: Conf. Ser. 1316, 012002 (2019).

N. Geerits, S. R. Parnell, M. A. Thijs, A. A. van Well, C. Franz, A. L. Washington, D. Raspino, R. M. Dalgliesh, and J. Plomp Time of flight modulation of intensity by zero effort on Larmor, Review of Scientific Instruments 90, 125101 (2019).

R. Wagner, L. Brandl, W. Kersten, S. Sponar, Y. Hasegawa, C. Huber, F. Bruckner and D. Suess, 3D printed magnets for neutron spin manipulation, EPJ Web Conf219, 10008 (2019).

W. Kersten, L. Brandl, R. Wagner, C. Huber, F. Bruckner, A. Hasegawa, D. Suess, and S. Sponar, Additive-Manufactured and Topology-Optimized Permanent-Magnet Spin Rotator for Neutron InterferometryPhysical Review Applied 12, 014023 (2019) or [quant-ph/1810.13225 ].

A. Danner, B. Demirel, S. Sponar and Y. Hasegawa, Development and perfomance of a miniaturised spin rotator suitable for neutron interferometer experimentsJournal of Physics Communications 3, 035001 (2019).

B. Demirel, S. Sponar, A. A. Abbott, C. Branciard, and Y. Hasegawa, Experimental test of an entropic measurement uncertainty relation for arbitrary qubit observablesNew Journal of Physics 21, 013038 (2019) or [quant-ph/1711.05023].

M. Blackener, B. Demirel , I. Drevenšek-Olenik, M. Fally, P. Flauger, P. Geltenbort, Y. Hasegawa, R. Kurinjimala, M. Ličen, C. Pruner, S. Sponar, Y. Tomita, and J. Klepp, Monte-Carlo simulation of neutron transmission through nanocomposite materials for neutron-optics applicationsNuclear Instruments and Methods in Physics Research A 916, 454–157 (2019)  or [quant-ph/1804.07263 ].


H. Geppert-Kleinrath, T. Denkmayr, S. Sponar, H. Lemmel, T. Jenke, and Y. Hasegawa, Multifold paths of neutrons in the three-beam interferometer detected by a tiny energy kickPhysical Review A 97, 052111 (2018) or [quant-ph/1805.05093].

T. Denkmayr, J. Dressel, H. Geppert-Kleinrath, Y. Hasegawa. and S. Sponar, Weak values from strong interactions in neutron interferometry, Physica B, 551, 339-346  (2018).


M. Waegell, T. Denkmayr, H. Geppert, D. Ebner, T. Jenke, Y. Hasegawa, S. Sponar, J. Dressel, J. Tollaksen, Confined contextuality in neutron interferometry: Observing the quantum pigeonhole effect, Physical Review A 96, 052131 (2017) or [quant-ph/1609.06046].

Georg Sulyok and Stephan Sponar, Heisenberg’s error-disturbance uncertainty relation: Experimental study of competing approaches,
Physical Review A 96, 022137 (2017).

T. Denkmayr, H. Geppert, H. Lemmel, M. Waegell, J. Dressel, Y. Hasegawa, and S. Sponar, Experimental Demonstration of Direct Path State Characterization by Strongly Measuring Weak Values in a Matter-Wave InterferometerPhysical Review Letters 118, 010402 (2017) or [quant-ph/1604.04102].


B. Demirel, S. Sponar, G. Sulyok, M. Ozawa, and Y. Hasegawa, Experimental Test of Residual Error-Disturbance Uncertainty Relations for Mixed Spin-1⁄2 States, Physical Review Letters 117, 140402 (2016) or [quant-ph/1511.03462].

S. Sponar, Error-disturbance uncertainty relations in neutron spin measurements, International Journal of Quantum Information 14, 1640016 (2016).

S. Sponar, T. Denkmayr, H. Geppert, and Y. Hasegawa, Fundamental Features of Quantum Dynamics Studied in Matter-Wave Interferometry—Spin Weak Values and the Quantum Cheshire-Cat,  Atoms 4, 11 (2016).


S. Sponar, T. Denkmayr, H. Geppert, H. Lemmel, A. Matzkin, J. Tollaksen, and Y. Hasegawa, Weak values obtained in matter-wave interferometryPhysical Review A 92, 062121 (2015) or [quant-ph/1404.2125].

G. Sulyok, S. Sponar, B. Demirel, F. Buscemi, M. J. Hall, M. Ozawa, and Y. Hasegawa, Experimental test of entropic noise-disturbance uncertainty relations for spin – 1/2 measurements, Physical Review Letters 115, 030401 (2015) or [quant-ph/1504.04200].

B. Demirel, S. Sponar, and Y. Hasegawa, Measurement of the spin-rotation coupling in neutron polarimetry, New Journal of Physics 17, 023065 (2015).

H. Lemmel, P. Brax, A. Ivanov, T. Jenke, G. Pignol, M. Pitschmann, T. Potocar, M. Wellenzohn, M. Zawisky, H. Abele, Neutron interferometry constrains dark energy chameleon fieldsPhysics Letters B 743, 310 – 314 (2015).

V.-O. de Haan, J. Plomp, A. A. van Well, M. T. Rekveldt, Y. Hasegawa, R. M. Dalgliesh, and N.-J. Steinke, Measurement of gravitation-induced quantum interference for neutrons in a spin-echo spectrometer, Physical Review A 89, 063611 (2015).


S. Sponar, G. Sulyok, J. Erhart, and Y. Hasegawa, Error-Disturbance Uncertainty Relations in Neutron-Spin Measurements, Advances in High Energy Physics 2014, 735398 (2014).

T. Denkmayr, H. Geppert, S. Sponar, H. Lemmel, A. Matzkin, J. Tollaksen, and Y. Hasegawa, Observation of a quantum Cheshire Cat in a matter-wave interferometer experimentNature Communications 5, 4492 (2014).

J. Klepp, S. Sponar, and Y. Hasegawa, Fundamental phenomena of quantum mechanics explored with neutron interferometers, Progress of Theoretical and Experimental Physics 2014, 082A0 (2014) or [quant-ph/1407.2526].

H. Geppert, T. Denkmayr, S. Sponar, H. Lemmel, and Y. Hasegawa, Improvement of the polarized neutron interferometer setup demonstrating violation of a Bell-like inequalityNuclear Instruments and Methods in Physics Research A 763, 417–423 (2014) or [quant-ph/1404.3512].


G. Sulyok, S. Sponar, J. Erhart, G. Badurek, M. Ozawa, and Y. Hasegawa, Violation of Heisenberg’s error-disturbance uncertainty relation in spin measurements, Physical Review A 88, 022110 (2013) or [quant-ph/1305.7251].

D. Erdösi, M. Huber, B. C. Hiesmayr, and Y. Hasegawa, Proving the generation of genuine multipartite entanglement in a single-neutron interferometer experimentNew Journal of Physics 15, 023033  (2013).

Hartmut Lemmel, Influence of Bragg diffraction on perfect crystal neutron phase shifters and the exact solution of the two-beam case in the dynamical diffraction theory, Acta Crystallographica A 69, 459–474 (2013).


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

J. Erhart, S. Sponar, G. Sulyok, G. Badurek, M. Ozawa, and Y. Hasegawa, Experimental demonstration of a universally valid error-disturbance uncertainty relation in spin-measurements, Nature Physics 8, 185-189 (2012) or [quant-ph/1201.1833].

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


Yuji Hasegawa and Helmut Rauch: Quantum phenomena explored with neutrons, New Journal of Physics 13 115010 (2011).


S. Sponar, J. Klepp, R. Loidl, S. Filipp, K. Durstberger, R. Bertlmann, G. Badurek, H. Rauch, and Y. Hasegawa, Geometric phase in entangled systems: A single- neutron interferometer experimentPhysical Review A 81, 042113 (2010).

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

S. Sponar, J. Klepp, C. Zeiner, G. Badurek, and Y. Hasegawa, Violation of a Bell-like inequality for spin-energy entanglement in neutron polarimetryPhysics Letters A 374, 431-434 (2010) or [quant-ph/0907.4654].

Y. Hasegawa, R. Loidl, G. Badurek, K. Durstberger, S. Sponar, and H. Rauch, Engineering of triply entangled states in a single-neutron systemPhysical Review A 81, 032121 (2010).

Y. Hasegawa, K. Durstberger, S. Sponar, and H. Rauch, Kochen-Specker theorem studied with neutron interferometer, Nuclear Instruments and Methods in Physics Research A 634, 21-24 (2010).

Hartmut Lemmel and Apoorva G. Wagh, Phase shifts and wave-packet displacements in neutron interferometry and a nondispersive, nondefocusing phase shifter, Physical Review A 82, 033626 (2010).

J. Springer, M. Zawisky, H. Lemmel and M. Suda, A neutron interferometric measurement of a phase shift induced by Laue transmission, Acta Crystallographica A 66, 17-21 (2010).


H. Bartosik, J. Klepp, C. Schmitzer, S. Sponar, A. Cabello, H. Rauch, and Y. Hasegawa, Experimental test of quantum contextuality in neutron interferometryPhysical Review Letters 103, 040403 (2009) or [quant-ph/0904.4576].

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


S. Sponar J. Klepp, R. Loidl, S. Filipp, G. Badurek, Y. Hasegawa, and H. Rauch, Coherent energy manipulation in single-neutron interferometryPhysical Review A 78, 061604(R) (2008) or [quant-ph/0803.3545].

J. Klepp, S. Sponar, S. Filipp, M. Lettner, G. Badurek, and Y. Hasegawa, Observation of Nonadditive Mixed-State Phases with Polarized Neutrons, Physical Review Letters 101, 150404 (2008) or [quant-ph/0809.0572].

S. Sponar, J. Klepp, G. Badurek, and Y. Hasegawa, Zero-field and Larmor spinor precessions in a neutron polarimeter experimentPhysics Letters A 372, 3153-3156 (2008) or [quant-ph/0802.1411].

important publications between 2001 and 2007:

Y. Hasegawa, R. Loidl, G. Badurek, S. Filipp, J. Klepp, and H. Rauch, Evidence for entanglement and full tomographic analysis of Bell states in a single-neutron system, Physical Review A 76, 052108 (2007).

H. Lemmel, Dynamical diffraction of neutrons and transition from beam splitter to phase shifter casePhysical Review B 76, 144305 (2007).

Y. Hasegawa, R. Loidl, G. Badurek, M Baron, and H. Rauch, Quantum Contextuality in a Single-Neutron Optical ExperimentPhysical Review Letters 97, 230401 (2006).

Y. Hasegawa, R. Loidl, G. Badurek, M. Baron, and H. Rauch, Violation of a Bell-like inequality in single-neutron interferometry, Nature (London) 425, 45 (2003).

H. Rauch, H. Lemmel, M. Baron, and R. Loidl, Measurement of a confinement induced neutron phase, Nature (London) 417, 630 (2002).

Y. Hasegawa, R. Loidl, G. Badurek, M Baron, and H. Rauch, Off-Diagonal Geometric Phase in a Neutron Interferometer ExperimentPhysical Review Letters 87, 070401 (2001).

selected publications with historical relevance between 1974 and 2000:

H. Rauch, M. Suda, and S. Pascazio, Decoherence, dephasing and depolarization, Physica B 267, 277 (1999).

J. Summhammer, K. A. Hamacher, H. Kaiser, H. Weinfurter, D. L. Jacobson, and S. A. Werner, Multiphoton Exchange Amplitudes Observed by Neutron InterferometryPhysical Review Letters 75, 3206 (1995).

J. Summhammer, H. Rauch, and D. Tuppinger, Stochastic and deterministic absorption in neutron-interference experiments,  Physical Review A 36, 4447 (1987).

G. Badurek, H. Rauch, and D. Tuppinger, Neutron interferometric double-resonance experiment, Physical Review A 34, 2600 (1986).

G. Badurek, H. Rauch, and J. Summhammer, Time-dependent superposition of spinors, Physical Review Letters 51, 1015 (1983).

J. Summhammer, G. Badurek, H. Rauch, U. Kischko, and A. Zeilinger, Direct observation of fermion spin superposition by neutron interferometry, Physical Review A 27, 2523 (1983).

R. Collela, A. W. Overhauser, and S. A. Werner, Observation of Gravitationally Induced Quantum InterferencePhysical Review Letters 34, 1472 (1975).

H. Rauch, A. Zeilinger, G. Badurek, A. Wilfing, W. Bauspiess, and U. Bonse, Verification of coherent spinor rotation of fermions, Physics Letters 54A, 425 (1975).

H. Rauch, W. Treimer, and U. Bonse, Test of a single crystal neutron interferometer, Physics Letters 47A, 369 (1974).