|
| related topics |
| {state, states, coherent} |
| {entanglement, phys, rev} |
| {level, atom, field} |
| {cavity, atom, atoms} |
| {time, decoherence, evolution} |
| {measurement, state, measurements} |
| {state, states, entangled} |
| {qubit, qubits, gate} |
|
Dynamical creation of entanglement by homodyne-mediated feedback
Jin Wang, H. M. Wiseman, G. J. Milburn
abstract: For two two-level atoms coupled to a single-mode cavity field that is driven
and heavily damped, the steady-state can be entangled by shining an
un-modulated driving laser on the system [S.Schneider, G. J. Milburn Phys. Rev
A 65, 042107, 2002]. We present a scheme to significantly increase the
steady-state entanglement by using homodyne-mediated feedback, in which the
driving laser is modulated by the homodyne photocurrent derived from the cavity
output. Such feedback can increase the nonlinear response to both the
decoherence process of the two-qubit system and the coherent evolution of
individual qubits. We present the properties of the entangled states using the
SO(3) Q function.
- oai_identifier:
- oai:arXiv.org:quant-ph/0409154
- categories:
- quant-ph
- comments:
- 8 pages
- doi:
- 10.1103/PhysRevA.71.042309
- arxiv_id:
- quant-ph/0409154
- journal_ref:
- Published in Phys. Rev. A 71, 042309, (2005)
- created:
- 2004-09-22
- updated:
- 2004-10-07
Full article ▸
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