|
| related topics |
| {time, decoherence, evolution} |
| {entanglement, phys, rev} |
| {state, states, entangled} |
| {operator, operators, space} |
| {qubit, qubits, gate} |
| {energy, gaussian, time} |
| {temperature, thermal, energy} |
| {information, entropy, channel} |
| {cos, sin, state} |
| {trap, ion, state} |
|
Phonon decoherence of quantum entanglement: Robust and fragile states
T. Yu, J. H. Eberly
abstract: We study the robustness and fragility of entanglement of open quantum systems
in some exactly solvable models in which the decoherence is caused by a pure
dephasing process. In particular, for the toy models presented in this paper,
we identify two different time scales, one is responsible for local dephasing,
while the other is for entanglement decay. For a class of fragile entangled
states defined in this paper, we find that the entanglement of two qubits, as
measured by concurrence, decays faster asymptotically than the quantum
dephasing of an individual qubit.
- oai_identifier:
- oai:arXiv.org:quant-ph/0209037
- categories:
- quant-ph cond-mat.mes-hall cond-mat.supr-con
- comments:
- 11 pages, revtex, no figures
- doi:
- 10.1103/PhysRevB.66.193306
- arxiv_id:
- quant-ph/0209037
- journal_ref:
- Phys. Rev. B, 66 (2002) 193306
- created:
- 2002-09-04
Full article ▸
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