Recent content by JamesPaylow

Having trouble unpacking these statements into a consistent conclusion. If I place a polarizer between the PBS and Detectors B1 & B2 will those polarizers impact the polarization of Photon A or no? Ultimately it's a question of whether the two photons are still entangled at this point. And, if...

This may not be a material point, but my expectation is that we start with an H/V superposition explicitly, not A/D. I believe I have a method of creating entangled pairs in this way, and have come up with a way of validating that prior to the experiment. It's all beyond the scope of this...

@DrClaude my sincere gratitude for continuing to respond, and in a friendly manner. I hear your point that the PBS does not change the state. I'm still struggling to understand the *why* of the outcome you're describing though. Specifically in the case where the polarizer acts after both the HWP...

@PeterDonis Please allow me to try using a couple different approaches to articulate my points better. First, with AI (I know this forum does not approve of using AI but I believe the text below can help clarify). Forum Member's Claim: "No, they are not. @DrClaude has already shown you the...

@DrClaude @vanhees71 I really appreciate your continued engagement. Just to reiterate the Scenario 2 first case, in whidh Path A is longer, we should consider that both the HWP and PBS (in path B) are interacting before the polarizer (in path A). I worry that your initial responses are instead...

@DrClaude If you can please. Thanks so much for your ongoing and very useful responses.

Thanks for your response. In this setup, as I'm understanding, the measurements on Photon A and Photon B are not on "disjoint degrees of freedom" in the strict sense because they are measurements on the same property (polarization) of two entangled particles. As such, the order of these...

Sorry but I still have a question. What you are saying is that regardless of whether Photon A encounters the polarizer in Path A before or after Photon B encounters the HWP+PBS is irrelevant, and that what we see at detectors will always behave as if Path A polarizer impact happened first. Why...

@DrClaude @DrChinese I would be very grateful if you were able to answer my two follow-up questions above. Thanks in advance!

@DrClaude Wow thanks for all the great detail! I have a couple follow-up questions if you don't mind please. Both relate to the first case in scenario 2. 1. If I'm correctly following you, as a result of Photon A becoming |D>, Photon B becomes |H>, because Photon B has gone through the 22.5...

Please consider the depicted setup. We assume that the source is producing only H/V polarization entangled photon pairs (which is separately confirmed prior to the experiment). Scenario 1) First suppose that the depicted 45 Degree Linear Polarizer A is absent. Photon B's polarization is in H/V...

@vanhees71 , @gentzen super useful. This is what I needed. Thanks so much!

Thank you for your thoughtful replies. Do you mean a polarizing beam slitter or normal? Edit: I think the challenge with using a BS or PBS is that I have either H/V or one specific something else (whether that is D, A, RHC, or LHC). So, I don't need to distinguish between H and V. Also, if I...

The ability to differentiate between circular (right-hand circular or left-hand circular) and linear (H/V superposition) polarization would also work.

I understand, but still I understand the two things to be distinct. Suppose I start with a set of two polarization-entangled photons. They are both in a H/V superposition and are othogonally polarized. One of them may or may not travel through a 45 degree linear polarizer. If it does, the...