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Can you name a few interactions that entangle particles

  1. Feb 6, 2016 #1
    It says everywhere that particle decay is not the only thing that creates entangled particles.

    "Quantum entanglement is a physical phenomenon that occurs when pairs or groups of particles are generated or interact in ways such that the quantum state of each particle cannot be described independently — instead, a quantum state may be given for the system as a whole."

    It says subatomic particles can get entangled after they interact in special ways.

    For example, all the electrons that orbit the same nucleus are entangled.

    Can you name other such interactions?
  2. jcsd
  3. Feb 6, 2016 #2
    Give only the name of the interaction (for example, Cooper pair production), not reference to papers or mathematical equations, please
  4. Feb 6, 2016 #3


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    I think you can safely say that almost any interaction between a pair of quantum systems has the potential to create entanglement. In fact, it would be weirder if an interaction between a pair of particles didn't leave them at least slightly entangled.

    For starters, any scattering process between two particles can create entanglement (e.g., Rutherford scattering).

    The only time you can guarantee that no entanglement is generated is when the joint Hamiltonian can be decomposed into a sum of separate Hamiltonians for each particle, which amounts to them evolving independently of one another in time.
  5. Feb 9, 2016 #4
    Scientists have realized that the Kondo effect results from a relationship between electrons known as "entanglement" in which the quantum state of one electron is tied to those of neighboring electrons, even if the particles are later separated by considerable distances. In the case of Kondo effect, a trapped electron is entangled in a complex manner with a cloud of surrounding electrons.

    Read more at: http://phys.org/news/2011-06-electrons-entangled.html#jCp
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