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Entanglement in disordered and non-equilibrium systems

Abstract:

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 ...

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Publication status:
Published

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Publisher copy:
10.1016/j.physe.2009.06.073

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Volume:
42
Issue:
3
Pages:
359-362
Publication date:
2010-01-05
DOI:
ISSN:
1386-9477
URN:
uuid:fa1d038b-3066-4d1c-9bca-41e350905be1
Source identifiers:
158775
Local pid:
pubs:158775

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