|
| related topics |
| {state, phys, rev} |
| {photon, photons, single} |
| {cavity, atom, atoms} |
| {time, decoherence, evolution} |
| {particle, mechanics, theory} |
| {entanglement, phys, rev} |
| {state, states, entangled} |
| {level, atom, field} |
| {cos, sin, state} |
| {light, field, probe} |
| {alice, bob, state} |
| {spin, pulse, spins} |
|
W state generation and effect of cavity photons on the purification of
dot-like single quantum well excitons
C. -M. Li, Y. -N. Chen, C. -W. Luo, D. -S. Chuu, J. -Y. Hsieh
abstract: A scheme of three-particle entanglement purification is presented in this
work. The physical system undertaken for investigation is dot-like single
quantum well excitons independently coupled through a single microcavity mode.
The theoretical framework for the proposed scheme is based on the quantum jump
approach for analyzing the progress of the trible-exciton entanglement as a
series of conditional measurement has been taken on the cavity field state. We
first investigate how cavity photon affects the purity of the double-exciton
state and the purification efficiency in two-particle protocol. Then we extend
the two-particle case and conclude that the three-exciton state can be purified
into W state, which involves the one-photon-trapping phenomenon, with a high
yield. Finally, an achievable setup for purification using only modest and
presently feasible technologies is also proposed.
- oai_identifier:
- oai:arXiv.org:quant-ph/0410074
- categories:
- quant-ph
- comments:
- 9 pages and 4 figures
- arxiv_id:
- quant-ph/0410074
- created:
- 2004-10-10
- updated:
- 2004-10-19
Full article ▸
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