Based on the Green's function approach, the entanglement of electron spins in many-body systems was investigated. The two-particle density matrix of a noninteracting electron gas is analyzed and its two-spin density matrix as a Werner state was identified. Entanglement measurements, a classical correlation, mutual information, and a pair distribution function of two electrons at zero and finite temperatures was calculated. The changes of entanglement measures were found to be proportional to T2 at low temperatures.
|Journal||Physical Review A - Atomic, Molecular, and Optical Physics|
|Issue number||5 B|
|Publication status||Published - May 2004|
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics