Observation of geometric phases in quantum erasers

Details Observation of geometric phases in quantum erasers Observation of geometric phases in quantum erasers

2009-07-14

arxiv.org/abs/0907.2289v2

J. Phys. Soc. Jpn. 80, 034401 (2011)

Physics

Quantum Physics

7 pages, 14 figures

Scientific paper

10.1143/JPSJ.80.034401

We introduce a simple experiment involving a double-slit interferometer by which one can learn basic concepts of quantum interference such as which-path marking, quantum erasers, and geometric phases. Each of them exhibits seemingly mysterious phenomena in quantum physics. In our experiment, we use the double-slit interference of visible light with the polarization as an internal state to demonstrate the disappearance of fringes by which-path marking, recovery of interference using quantum erasers, and the rapid shifting of the fringe pattern induced by the geometric phase. We also present a simple theoretical analysis of an interferometer with an internal state.

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