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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. Foundations of Physics.

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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: Published Article or Volume
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: 19 Jun 2019 13:23
Last Modified: 19 Jun 2019 13:23
Item ID: 16130
Journal or Publication Title: Foundations of Physics
Official URL: https://doi.org/10.1007/s10701-019-00278-8
DOI or Unique Handle: https://doi.org/10.1007/s10701-019-00278-8
Subjects: Specific Sciences > Physics > Quantum Mechanics
Date: 9 May 2019
URI: http://philsci-archive.pitt.edu/id/eprint/16130

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