Interferometer used in quantum Cheshire cat scenario (IMAGE)

Hiroshima University

Interferometer used in quantum Cheshire cat scenario

Caption

The simple interferometer used in the quantum Cheshire cat scenario, where a photon is prepared in the path-polarisation entangled state ECC, but is only considered if it arrives on output path + with polarisation D. The paradox arises when we consider the photon’s path, polarisation, and path-polarisation correlation, while it is inside the interferometer.

Credit

Jonte R Hance et al 2023 New J. Phys. 25 113028

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