Publications related to Topological Phases

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].

N. Geerits and S. Sponar, Twisting Neutral Particles with Electric Fields, Physical Review A 103, 022205 (2021)
or arXiv:2007.03345 [quant-ph].

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

Wenzel Kersten, Laurids Brandl, Richard Wagner, Christian Huber, Florian Bruckner, Yuji Hasegawa, Dieter Suess, and Stephan Sponar, Additive-Manufactured and Topology-Optimized Permanent-Magnet Spin Rotator for Neutron Interferometry, Physical Review Applied 12, 014023 (2019) [quant-ph/1810.13225 ].

Armin Danner, Bülent Demirel, Stephan Sponar and Yuji Hasegawa, Development and perfomance of a miniaturised spin rotator suitable for neutron interferometer experiments, Journal of Physics Communications 3, 035001 (2019).

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

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 experiment, Physical 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).

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

J. Klepp, S. Sponar, Y. Hasegawa, E. Jericha, and G. Badurek, Noncyclic Pancharatnam phase for mixed state SU(2) evolution in neutron polarimetrys, Physical Letters A 342, 48-52 (2005) [quant-ph/0505.209].

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