Limits and/or Properties of Entanglemen

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SUMMARY

Entanglement in quantum mechanics is a phenomenon where two particles, such as photons, remain correlated regardless of the distance separating them. When one particle is absorbed by an atom or interacts with another particle, the initial entanglement diminishes and ultimately ceases to exist. Specifically, observing one entangled particle results in the collapse of the entangled state, leaving the particles as independent entities without entanglement.

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When a particle decays into two different particles, they are said to be entangled. If one of these is absorbed by an atom or there is a subsequent interaction with another particle, what happens to the previous or initial entanglement? Does it diminish or completely go away?

For example, if two photons are entangled then one is in a subsequent photo electric action with an atom, what happens to the entanglement?
 
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I won't comment on what comprises or causes entanglement.
When A and B are entangled, observing A is observing B. That is, detecting A causes B to take the appropriately correlated value. There is no longer entanglement, just two particles.
 

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