All Questions
12 questions
3
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1
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41
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What is the outcome of Type I SPDC if the pump beam is circularly polarized?
I'm thinking about entangled photon pairs generation, specifically about Type-I SPDC where you use a pair of non-linear crystals such as BBO with their optical axes crossed and then the pump beam is ...
- 65
1
vote
2
answers
91
views
How to measure the direction of circular polarization of single photons?
I just watched this video about the 2022 Nobel prize in physics which mentions the experiments that have been conducted to test Bell's inequality. In the video, they also described the experiment by ...
- 300
0
votes
1
answer
36
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Limiting factors in traditional microscopy
I have been researching Entanglement-Enhanced Microscopy, and the overall breakthrough seems to be obtaining a resolution of $1/N$ as opposed to $1/\sqrt N$. This led me to ask what the limiting ...
0
votes
0
answers
108
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Benefit of using entangled photons over classically correlated source for ghost imaging
I have found a paper(See this) which talks about the comparison of classically correlated source and an entangled photon source (generated by Spontaneous Parametric Down Conversion)for ghost imaging. ...
1
vote
1
answer
67
views
How are energies conserved when a photon is split into an entangled pair?
Consider a setup in which a single photon is split into an entangled pair and directed towards 2 independent experimental setups (A and B). Both A and B have lenses to detect the polarization of the ...
- 11
0
votes
0
answers
46
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Can we tune an entanglement between photons to get these interference fringes?
I am reading this article, where
the author uses the Jones formalism to describe the interference with polarizers.
The first one is vertical and the angle of the other can vary. This gives different ...
- 738
3
votes
1
answer
124
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Can I create squeezing with a $P^2$ interaction?
One approach to squeeze light is through the one-mode squeezing operator, which can be written as $e^{-i H t}$ with $H \sim (a^2 - (a^\dagger)^2)$. My question is, can I create squeezing with $H \sim ...
- 1,231
5
votes
1
answer
1k
views
What is frequency entanglement?
If frequency (or energy) is regarded as a quantum property, can one generate a pair of photons with frequency entanglement? What would be the uses of this type of entangelment in say, sensing? How ...
- 142
1
vote
1
answer
172
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Question about the shift of patterns in the Delayed Choice Quantum Eraser
In the double-slit Delayed Choice Quantum Eraser experiment by Scully with the installation in the figure below, as in Wikipedia, when a photon hits D4 or D3 the intricated photon hits D0 with a ...
- 23
6
votes
2
answers
1k
views
Why use 2 nonlinear crystals in conjunction for SPDC?
I've seen a few articles (ex: 1, 2) that use either two BBO crystals consecutively or a BBO and a KDP crystal to create entangled photon pairs from Spontaneous Parametric Down-Conversion (SPDC). And ...
- 338
3
votes
2
answers
141
views
Can decoherence occur just by simple reflection?
I create an entangled photon pair. One photon is sent inside a resonant cavity which reflects the photon many number of times. Will there be decoherence between photon in the resonant cavity and its ...
- 570
6
votes
2
answers
325
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Entanglement $g^{(2)}$ experiment - what components do I need?
I would like to measure whether my source emits entangled photon pairs. To that order I want to build a $g^{(2)}$ experiment, which measures photon coincidence counts as a function of time delay ...
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