Research field (3):
Semiconductors, optical and atomic physics
, Quantum beam science
, Theoretical studies related to particle-, nuclear-, cosmic ray and astro-physics
Research theme for competitive and other funds (7):
2020 - 2023 弱値・弱測定の切り拓く新たな素粒子・量子物理研究
2018 - 2022 Study of quantum dynamics on foundamental level with weak values
2014 - 2019 Mathematical Studies of Fundamental Principles of Quantum Theory
2004 - 2007 光学実験を手段とした量子情報処理のための量子力学的物理現象の研究
1997 - 1999 Development of X-ray polarization microscopy
1997 - 1998 ダイヤモンド結晶を用いた透過型X線偏光素子の開発
1997 - 1998 完全結晶を用いた分離型X線・熱中性子線干渉計の開発と応用
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Papers (72):
Armin Danner, Hartmut Lemmel, Richard Wagner, Stephan Sponar, Yuji Hasegawa. Neutron Interferometer Experiments Studying Fundamental Features of Quantum Mechanics. Atoms. 2023
Richard Wagner, Wenzel Kersten, Hartmut Lemmel, Stephan Sponar, Yuji Hasegawa. Quantum causality emerging in a delayed-choice quantum Cheshire Cat experiment with neutrons. SCIENTIFIC REPORTS. 2023. 13. 1
Stephan Sponar, Armin Danner, Masanao Ozawa, Yuji Hasegawa. Neutron optical test of completeness of quantum root-mean-square errors. npj Quantum Information. 2021. 7. 1. 106/1-106/6
Stephan Sponar, Armin Danner, Vito Pecile, Nico Einsidler, Bülent Demirel, Yuji Hasegawa. Experimental test of entropic noise-disturbance uncertainty relations for three-outcome qubit measurements. Physical Review Research. 2021. 3. 2
Stephan Sponar, René I. P. Sedmik, Mario Pitschmann, Hartmut Abele, Yuji Hasegawa. Tests of fundamental quantum mechanics and dark interactions with low-energy neutrons. Nature Reviews Physics. 2021. 3. 5. 309-327
Armin Danner, Niels Geerits, Hartmut Lemmel, Richard Wagner, Stephan Sponar, Yuji Hasegawa. Three-Path Quantum Cheshire Cat Observed in Neutron Interferometry. 2023
Hartmut Lemmel, Niels Geerits, Armin Danner, Yuji Hasegawa, Holger F. Hofmann, Stephan Sponar. Quantifying the presence of a neutron in the paths of an interferometer. 2022
Georg Sulyok, Bulent Demirel, Stephan Sponar, Francesco Buscemi, Michael J. W. Hall, Masanao Ozawa, Yuji Hasegawa. Experimental Test of Entropic Noise-Disturbance Uncertainty Relations for Spin-1/2 Measurements (vol 115, 030401, 2015). PHYSICAL REVIEW LETTERS. 2016. 117. 6