Entangled Photon Measurements: A(t) = d/c and B(t) = 5d/c

In summary, entangled photons in a superposition state are sent from a source to polarizers and then to detectors A and B. If A measures a vertical photon, B must be horizontally polarized. When comparing the random polarized photons at both detectors, the entangled anti-correlated pairs of photons are observed. In another experiment with the same setup, but different distances from the source to the detectors, the perfect anti-correlations are still expected. It is not correct to say that each photon of the entangled pair is oscillating in a HVHVHVHV pattern from the time of creation until detection. Linearly polarized light remains linearly polarized, and the other photon's polarization can be predicted in the same basis regardless of
  • #1
morrobay
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Entangled photons in superposition state : | Ψ} = (|HV} - | VH})/1/√2 are sent from source to polarizers and then to detectors A and B ( in this setup distance from source to detectors is equal). If A measures vertical photon she knows immediately that B photon must be horizontally polarized.
After the stream of random polarized photons at A and B, are compared for time at detectors being equal
the entangled anti correlated pairs of photons are observed.
In another experimental setup with entangled photons prepared the same way the distance from source to detector A = d and distance from source to detector B = 5d.
Then one of the entangled pair is measured at A(t) = d/c and the other is measured at B(t) = 5d/c
Would you expect that the perfect anti correlations for the entangled pair of photons
to hold in second case ?
 
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  • #2
morrobay said:
Would you expect that the perfect anti correlations for the entangled pair of photons
to hold in second case ?
Yes. Why do you think it wouldn't?
 
  • #3
When the pair of entangled photons are in horizontal/verticle superposition is it correct to say that each photon of the pair is oscillating , ie. HVHVHVHVHV...
From time of creation at source until detection ?
 
  • #4
morrobay said:
When the pair of entangled photons are in horizontal/verticle superposition is it correct to say that each photon of the pair is oscillating , ie. HVHVHVHVHV...
From time of creation at source until detection ?
No, it's not correct to say that. Linearly polarized light stays linearly polarized in non-birefringent medium. And when you detect one photon from entangled pair the other photon's polarization can be predicted in the same basis no matter when you detect it. In your model correlations would depend on path difference between two photon paths. But no such thing is observed in experiments.
 
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1. What is an entangled photon measurement?

An entangled photon measurement refers to a process in which two or more photons are created or interact with each other in such a way that their quantum states become dependent on each other. This means that the properties of one photon cannot be fully described without also considering the properties of the other(s).

2. What is the meaning of the equations A(t) = d/c and B(t) = 5d/c in relation to entangled photon measurements?

These equations represent the measurement outcomes of two entangled photons, A and B, at a specific time (t). The value of d represents the distance between the two photons, and c is the speed of light. The equations show that the measurement outcomes of the entangled photons are correlated, with B(t) being a multiple of A(t).

3. How are entangled photon measurements used in scientific research?

Entangled photon measurements are used in various fields of research, such as quantum mechanics, quantum information processing, and quantum cryptography. They allow scientists to study the properties of entangled particles and explore the principles of quantum mechanics, which can lead to new technologies and applications.

4. Are entangled photon measurements always accurate?

Entangled photon measurements are not always accurate, as they are subject to various factors such as experimental error and external interference. However, the correlations between the measurements of entangled photons have been consistently observed and verified in numerous experiments, which supports the validity of this phenomenon.

5. How do entangled photon measurements challenge our understanding of classical physics?

Entangled photon measurements challenge our understanding of classical physics because they violate the principles of locality and determinism. This means that the properties of entangled particles cannot be fully predicted or explained by classical physics, and their behavior is influenced by factors that are not directly observable or measurable.

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