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Reduced and projected two-particle entanglement at finite temperatures.

Samuelsson, Peter LU ; Neder, I and Büttiker, M (2009) In Physical Review Letters 102(10).
Abstract
We present a theory for two-particle entanglement production and detection in mesoscopic conductors at finite temperature. The entanglement of the density matrix projected out of the emitted many-body state differs from the entanglement of the reduced density matrix, detectable by current correlation measurements. Under general conditions reduced entanglement constitutes a witness for projected entanglement. Applied to the recent experiment [Neder et al., Nature (London) 448, 333 (2007)10.1038/nature05955] on a fermionic Hanbury Brown Twiss two-particle interferometer we find that despite an appreciable entanglement production in the experiment, the detectable entanglement is close to zero.
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review Letters
volume
102
issue
10
publisher
American Physical Society
external identifiers
  • wos:000264139500053
  • pmid:19392143
  • scopus:63249136249
ISSN
1079-7114
DOI
10.1103/PhysRevLett.102.106804
language
English
LU publication?
yes
id
ff32468c-f1eb-4a5e-84e8-4d9ffd0429b3 (old id 1391861)
date added to LUP
2009-05-12 10:10:07
date last changed
2017-10-08 03:42:55
@article{ff32468c-f1eb-4a5e-84e8-4d9ffd0429b3,
  abstract     = {We present a theory for two-particle entanglement production and detection in mesoscopic conductors at finite temperature. The entanglement of the density matrix projected out of the emitted many-body state differs from the entanglement of the reduced density matrix, detectable by current correlation measurements. Under general conditions reduced entanglement constitutes a witness for projected entanglement. Applied to the recent experiment [Neder et al., Nature (London) 448, 333 (2007)10.1038/nature05955] on a fermionic Hanbury Brown Twiss two-particle interferometer we find that despite an appreciable entanglement production in the experiment, the detectable entanglement is close to zero.},
  articleno    = {106804},
  author       = {Samuelsson, Peter and Neder, I and Büttiker, M},
  issn         = {1079-7114},
  language     = {eng},
  number       = {10},
  publisher    = {American Physical Society},
  series       = {Physical Review Letters},
  title        = {Reduced and projected two-particle entanglement at finite temperatures.},
  url          = {http://dx.doi.org/10.1103/PhysRevLett.102.106804},
  volume       = {102},
  year         = {2009},
}