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Enhancing the detection of natural thermal entanglement with disorder.

Abstract:

Physical systems have some degree of disorder present in them. We discuss how to treat natural, thermal entanglement in any random macroscopic system from which a thermodynamic witness bounded by a constant can be found. We propose that functional many-body perturbation theory be applied to allow either a quenched or an annealed average over the disorder to be taken. We find, when considering the example of an XX Heisenberg spin chain with a random coupling strength, that the region of natura...

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Publication status:
Published

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Institution:
University of Oxford
Department:
Oxford, MPLS, Physics, Atomic and Laser Physics
Journal:
Physical review letters
Volume:
102
Issue:
10
Pages:
100503
Publication date:
2009-03-05
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
URN:
uuid:1200f211-c657-4012-8e65-03b5125b64c5
Source identifiers:
154207
Local pid:
pubs:154207
Language:
English

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