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Multifold paths of neutrons in the three-beam interferometer detected by a tiny energy kick
| Title: | Multifold paths of neutrons in the three-beam interferometer detected by a tiny energy kick |
| Authors: | Geppert-Kleinrath, Hermann Browse this author | | Denkmayr, Tobias Browse this author | | Sponar, Stephan Browse this author | | Lemmel, Hartmut Browse this author | | Jenke, Tobias Browse this author | | Hasegawa, Yuji Browse this author |
| Issue Date: | 10-May-2018 |
| Publisher: | American Physical Society (APS) |
| Journal Title: | Physical Review A |
| Volume: | 97 |
| Issue: | 5 |
| Start Page: | 052111 |
| Publisher DOI: | 10.1103/PhysRevA.97.052111 |
| Abstract: | A neutron optical experiment is presented to investigate the paths taken by neutrons in a three-beam interferometer. In various beam paths of the interferometer, the energy of the neutrons is partially shifted so that the faint traces are left along the beam path. By ascertaining an operational meaning to "the particle's path," which-path information is extracted from these faint traces with minimal perturbations. Theory is derived by simply following the time evolution of the wave function of the neutrons, which clarifies the observation in the framework of standard quantum mechanics. Which-way information is derived from the intensity, sinusoidally oscillating in time at different frequencies, which is considered to result from the interfering cross terms between stationary main component and the energy-shifted which-way signals. Final results give experimental evidence that the (partial) wave functions of the neutrons in each beam path are superimposed and present in multiple locations in the interferometer. |
| Rights: | ©2018 American Physical Society |
| Type: | article |
| URI: | http://hdl.handle.net/2115/70794 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 長谷川 祐司
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