All Questions
8 questions
3
votes
1
answer
419
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Can post-selecting on the screen in the Delayed Choice Quantum Eraser experiment be used to predict the quantum-eraser measurement results?
I'm curious about QM and spent the last 3 days thinking about Delayed Choice Quantum Eraser (DCQE) experiment, but I couldn't solve this issue:
Assume we do the DCQE experiment so that for the whole ...
- 145
4
votes
3
answers
17k
views
Can Quantum Entanglement and Quantum Superposition be considered the same phenomenon?
Quantum entanglement is known to be the exchange of quantum information between two particles at a distance, while quantum superposition is known to be the uncertainty of a particle (or particles) ...
- 119
2
votes
2
answers
353
views
Quantum Eraser thought experiment with light photons of distinct color
I tried to recreate the Quantum Eraser experiment into a thought experiment with a few changes. It left me a little perplexed as to what outcomes I should expect. Any help would be appreciated.
Lets ...
- 21
15
votes
4
answers
5k
views
What's the difference between an entangled state, a superposed state and a cat state?
1) Can a state be entangled without also being a superposition? (Please give an example.)
2) Can a state be a superposition without being entangled? (Again, an example please.)
3) And what about ...
- 5,807
6
votes
5
answers
6k
views
Does measuring destroy entanglement
Before measuring a quantum particle(photon) it exists in a superposition state, once we observe(measure) it, it settles in one of the possible states(destroying superposition).
For entangled particles,...
- 387
6
votes
4
answers
2k
views
Doesn't the Schrödinger's cat inside the box cause the probability wave function to collapse long before a human opens the box?
My point is that there is no superposition of dead and alive. The cat will cause the probability function to collapse long before we open the box. What am I missing here? Isn't the cat capable of ...
- 89
4
votes
1
answer
675
views
Connection between spin angular momentum of a photon and circular polarization of light
Do photons have spin angular momentum only if they are part of a circularly-polarized beam?
I suspect that every photon always has spin angular momentum, but in most cases they have a superposition ...
2
votes
1
answer
304
views
How do three electrons entangle with each other?
In a Quantum entity of two electrons entangled to each other, we know that when one electron's spin is known, then the other electron's spin is the opposite.
But, What's the case in a quantum entity ...
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