Entanglements in Systems with Multiple Degrees of Freedom

Details Entanglements in Systems with Multiple Degrees of Freedom Entanglements in Systems with Multiple Degrees of Freedom

2006-05-15

arxiv.org/abs/cond-mat/0605378v1

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures, submitted

Scientific paper

We present the entanglement properties of the spin-orbital coupling systems with multiple degrees of freedom. After constructing the maximally entangled spin-orbital basis of bipartite, we find that the quantum entanglement length in the noninteracting itinerant Fermion system with spin and orbit is considerably larger than that in the system with only spin. In the SU(2)$\otimes$SU(2) spin-orbital interacting system, the entanglement, expressed in terms of the spin-orbital correlation functions, clearly manifests the close relationship with the quantum phases in strongly correlated systems; and the entanglement phase diagram of the finite-size systems is in agreement with the magnetic and orbital phase diagram of the infinite systems. The application of the present theory on nucleon systems is suggested.

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