Quantum eraser in Bohmian Mechanics and many worlds theory

  • #1

Main Question or Discussion Point

All the literature on the quantum eraser that I've seen is grounded in the Copenhagen interpretation of quantum mechanics. It's very easy to understand the experiment in those terms.

Do you know how quantum eraser experiments are interpreted by the de Broglie–Bohm theory? What is erased in this case? Is the whichway information simply attached to the pilot wave instead of the particle?

And what about the Everettian many worlds interpretation? Does erasure of whichway information somehow undo the previous splitting of the universe?

Could you recommend any papers to learn more?
 

Answers and Replies

  • #2
stevendaryl
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Quantum erasure amounts to undoing a wave function collapse due to measurement. In interpretations that don't have collapse, there is nothing to undo. So Bohmian and Many-Worlds interpretations don't have any problems with these experiments, as far as I can see.
 
  • #3
vanhees71
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You don't undo anything. You just choose different partial ensembles using the fixed measurement protocol, using the Bell correlations of entangled states. Of course, Bohm nor many worlds have problems with this since both are interpretations of QT equivalent to the minimal interpretation (for non-relativistic QT, where an unambiguous Bohmian interpretation exists).
 
  • #4
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All the literature on the quantum eraser that I've seen is grounded in the Copenhagen interpretation of quantum mechanics. It's very easy to understand the experiment in those terms.

Do you know how quantum eraser experiments are interpreted by the de Broglie–Bohm theory? What is erased in this case? Is the whichway information simply attached to the pilot wave instead of the particle?

And what about the Everettian many worlds interpretation? Does erasure of whichway information somehow undo the previous splitting of the universe?

Could you recommend any papers to learn more?
See https://lanl.arxiv.org/abs/1703.08341 Sec. 5.1.
 

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