Entanglement of electron spins of non-interacting electron gases

Details Entanglement of electron spins of non-interacting electron gases Entanglement of electron spins of non-interacting electron gases

2004-03-30

arxiv.org/abs/quant-ph/0403214v1

Physical Review A 69, 054305 (2004)

Physics

Quantum Physics

4 pages, 4 figures, accepted for publication in Phys. Rev. A

Scientific paper

10.1103/PhysRevA.69.054305

We study entanglement of electron spins in many-body systems based on the Green's function approach. As an application we obtain the two-particle density matrix of a non-interacting electron gas and identify its two-spin density matrix as a Werner state. We calculate entanglement measures, a classical correlation, mutual information, and a pair distribution function of two electrons at zero and finite temperatures. We find that changes of entanglement measures are proportional to $T^2$ at low temperatures.

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