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Entanglement in disordered and non-equilibrium systems

✍ Scribed by Jenny Hide; Vlatko Vedral

Publisher
Elsevier Science
Year
2010
Tongue
English
Weight
166 KB
Volume
42
Category
Article
ISSN
1386-9477

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✦ Synopsis

We calculate an entanglement witness for a disordered spin system using the method of functional many-body perturbation theory, comparing the effect of taking a quenched and an annealed average over the disorder. We find, on considering the example of an XX Heisenberg spin chain with a Dzyaloshinskii-Moriya interaction, that disorder in the Dzyaloshinskii-Moriya interaction increases the region of entanglement detected by the witness. We also discuss a method of detecting entanglement in far from equilibrium systems.

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