Single-Site Entanglement of Fermions at a Quantum Phase Transition

Details Single-Site Entanglement of Fermions at a Quantum Phase Transition Single-Site Entanglement of Fermions at a Quantum Phase Transition

2006-02-03

arxiv.org/abs/quant-ph/0602048v2

Phys. Rev. A 73, 042320 (2006)

Physics

Quantum Physics

4 pages, no figure. Published version

Scientific paper

10.1103/PhysRevA.73.042320

We show that the single-site entanglement of a generic spin-1/2 fermionic lattice system can be used as a reliable marker of a finite-order quantum phase transition, given certain provisos. We discuss the information contained in the single-site entanglement measure, and provide illustrations from the Mott-Hubbard metal-insulator transitions of the one-dimensional Hubbard model, and the Hubbard model with long-range hopping.

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