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The "Delayed Choice Quantum Eraser" Neither Erases Nor Delays

Kastner, Ruth (2019) The "Delayed Choice Quantum Eraser" Neither Erases Nor Delays. [Preprint]

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Abstract

It is demonstrated that ‘quantum eraser’ (QE) experiments do not erase any information. Nor do they demonstrate retrocausation or ‘temporal nonlocality’ in their ‘delayed choice’ form, beyond standard EPR correlations. It is shown that the erroneous erasure claims arise from assuming that the improper mixed state of the signal photon physically prefers either the ‘which way’ or ‘both ways’ basis, when no such preference is warranted. The latter point is illustrated through comparison of the QE spatial state space with the spin-1/2 space of particles in the EPR-spin experiment.


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Item Type: Preprint
Creators:
CreatorsEmailORCID
Kastner, Ruthrkastner@umd.edu
Keywords: Quantum Eraser, EPR Experiment, Quantum Theory
Subjects: Specific Sciences > Physics > Quantum Mechanics
Depositing User: Ruth E. Kastner
Date Deposited: 12 May 2019 01:55
Last Modified: 12 May 2019 01:55
Item ID: 15996
Subjects: Specific Sciences > Physics > Quantum Mechanics
Date: 9 May 2019
URI: https://philsci-archive-dev.library.pitt.edu/id/eprint/15996

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