Is quantum entanglement fully understood?

Fizicks1
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I came across this phenomenon during my undergrad quantum mechanics studies, but haven't delved into it very much.

I'm interested to know though, if theory for quantum entanglement is complete?
 
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Fizicks1 said:
I came across this phenomenon during my undergrad quantum mechanics studies, but haven't delved into it very much.

I'm interested to know though, if theory for quantum entanglement is complete?

You are asking several questions which depend on your definition of the words for an answer. I will give you one take.

Generally, you could say that the theory for quantum entanglement IS complete. That is because it is mostly described by Quantum Mechanics, which is often labeled as "complete". The basic principles and underlying theory have not changed in decades. In fact, a debate about the completeness of QM started in 1935.

Please don't take the above as meaning that entanglement is fully understood. That is a different question altogether. I would say that we are learning much about entanglement every year, and I am not sure it will ever be fully understood.

How's that for straddling both sides of the fence! :smile:
 
Fizicks1 said:
I came across this phenomenon during my undergrad quantum mechanics studies, but haven't delved into it very much.

I'm interested to know though, if theory for quantum entanglement is complete?

Well, one could question whether ANY theory is complete.

What they have is mathematics that predicts a certain type of unpredictability.
 
Insights auto threads is broken atm, so I'm manually creating these for new Insight articles. Towards the end of the first lecture for the Qiskit Global Summer School 2025, Foundations of Quantum Mechanics, Olivia Lanes (Global Lead, Content and Education IBM) stated... Source: https://www.physicsforums.com/insights/quantum-entanglement-is-a-kinematic-fact-not-a-dynamical-effect/ by @RUTA
If we release an electron around a positively charged sphere, the initial state of electron is a linear combination of Hydrogen-like states. According to quantum mechanics, evolution of time would not change this initial state because the potential is time independent. However, classically we expect the electron to collide with the sphere. So, it seems that the quantum and classics predict different behaviours!
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