|
| related topics |
| {temperature, thermal, energy} |
| {state, states, entangled} |
| {energy, state, states} |
| {entanglement, phys, rev} |
| {energy, gaussian, time} |
| {bell, inequality, local} |
| {measurement, state, measurements} |
| {theory, mechanics, state} |
| {state, phys, rev} |
| {phase, path, phys} |
| {observables, space, algebra} |
|
Detecting entanglement with a thermometer
Janet Anders, Dagomir Kaszlikowski, Christian Lunkes, Toshio Ohshima, Vlatko Vedral
abstract: We present a general argument showing that the temperature as well as other
thermodynamical state variables can qualify as entanglement witnesses for
spatial entanglement. This holds for a variety of systems and we exemplify our
ideas using a simple free non-interacting Bosonic gas. We find that
entanglement can exist at arbitrarily high temperatures, provided that we can
probe smaller and smaller regions of space. We then discuss the relationship
between the occurrence of Bose-Einstein condensation and our conditions for the
presence of entanglement and compare the respective critical temperatures. We
close with a short discussion of the idea of seeing entanglement as a
macroscopic property in thermodynamical systems and its possible relation to
phase transitions in general.
- oai_identifier:
- oai:arXiv.org:quant-ph/0512181
- categories:
- quant-ph
- comments:
- 7 pages, 3 figures, v2: replaced with published version, use .pdf if
possible
- doi:
- 10.1088/1367-2630/8/8/140
- arxiv_id:
- quant-ph/0512181
- journal_ref:
- New Journal of Physics 8 (2006) 140
- created:
- 2005-12-21
- updated:
- 2006-09-19
Full article ▸
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