|
related topics |
{state, states, coherent} |
{state, phys, rev} |
{alice, bob, state} |
{photon, photons, single} |
{measurement, state, measurements} |
{states, state, optimal} |
{information, entropy, channel} |
{group, space, representation} |
{time, decoherence, evolution} |
{phase, path, phys} |
{light, field, probe} |
{state, states, entangled} |
{temperature, thermal, energy} |
|
Remote state preparation and teleportation in phase space
Matteo G. A. Paris, Mary Cola, Rodolfo Bonifacio
abstract: Continuous variable remote state preparation and teleportation are analyzed
using Wigner functions in phase space. We suggest a remote squeezed state
preparation scheme between two parties sharing an entangled twin beam, where
homodyne detection on one beam is used as a conditional source of squeezing for
the other beam. The scheme works also with noisy measurements, and provide
squeezing if the homodyne quantum efficiency is larger than 50%. Phase space
approach is shown to provide a convenient framework to describe teleportation
as a generalized conditional measurement, and to evaluate relevant degrading
effects, such the finite amount of entanglement, the losses along the line, and
the nonunit quantum efficiency at the sender location.
- oai_identifier:
- oai:arXiv.org:quant-ph/0209168
- categories:
- quant-ph
- comments:
- 2 figures, revised version to appear in J.Opt.B
- doi:
- 10.1088/1464-4266/5/3/370
- arxiv_id:
- quant-ph/0209168
- journal_ref:
- J. Opt. B vol 5, S360 (2003)
- created:
- 2002-09-30
- updated:
- 2003-01-21
Full article ▸
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