In the delayed choice quantum eraser (DCQE), such as the walborn paper, link below:(adsbygoogle = window.adsbygoogle || []).push({});

http://arxiv.org/PS_cache/quant-ph/pdf/0106/0106078v1.pdf" [Broken]

we try to find out the polarization/path via quarter wave plates (see diagram on page 7 of the paper)

Now does not entanglement break (i.e. wave function collapse) at that point?

later when we erase which-way info, does the same entanglement again re-join?

what is the popular explanation among physicist on this?

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# Entanglement in delayed choice quantum eraser (DCQE)

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