|
| related topics |
| {state, states, entangled} |
| {state, states, coherent} |
| {energy, gaussian, time} |
| {entanglement, phys, rev} |
| {bell, inequality, local} |
| {let, theorem, proof} |
| {cos, sin, state} |
| {information, entropy, channel} |
| {states, state, optimal} |
|
Lower bounds on the entanglement of formation for general Gaussian states
G. Rigolin, C. O. Escobar
abstract: We derive two lower bounds on entanglement of formation for arbitrary mixed
Gaussian states by two distinct methods. To achieve the first one we use a
local measurement procedure derived by Giedke et al [Quantum Inf. and Comp.
vol.1, 79 (2001)] that symmetrizes a general Gaussian state and the fact that
entanglement cannot increase under local operations and classical
communications. The second one is obtained via a generalization to mixed states
of an interesting result derived by Giedke et al [quant-ph/0304042], who show
that squeezed states are those that, for a fixed amount of entanglement,
maximize Einstein-Podolsky-Rosen-like correlations.
- oai_identifier:
- oai:arXiv.org:quant-ph/0307023
- categories:
- quant-ph
- comments:
- 6 pages, no figures, RevTex4, published version
- doi:
- 10.1103/PhysRevA.69.012307
- arxiv_id:
- quant-ph/0307023
- journal_ref:
- Phys. Rev. A 69, 012307 (2004)
- created:
- 2003-07-03
- updated:
- 2004-01-18
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