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2013, № 6 (155)



Arifullin M. R., Berdinsky V. L. QUANTUM ENTANGLEMENT OF SPIN STATES OF INDISTINGUISHABLE FERMIONSSpin density matrices of the system, containing arbitrary even number N of indistinguishable fermions with spin S = 1/2, described by antisymmetric wave function, have been calculated. The indistinguishability and the Pauli principles are proved to determine uniquely spin states, spin correlations and entanglement of fermion spin states. Increase of the particle number in the multifermion system reduces the spin correlation in any pair of fermions. The fully entangled system of N electrons are shown to be composed by pairs with nonentangled spin states that is the incoherent superposition of the singlet and triplet states.Key words: quantum entanglement, density matrix, Pauli's principle, quantum correlations.

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About this article

Authors: Arifullin M.R., Berdinskiy V.L.

Year: 2013


Editor-in-chief
Sergey Aleksandrovich
MIROSHNIKOV

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