|
| related topics |
| {time, decoherence, evolution} |
| {energy, gaussian, time} |
| {state, states, entangled} |
| {bell, inequality, local} |
| {time, wave, function} |
| {entanglement, phys, rev} |
| {states, state, optimal} |
| {equation, function, exp} |
| {group, space, representation} |
| {temperature, thermal, energy} |
| {state, states, coherent} |
| {information, entropy, channel} |
|
Disentanglement and Decoherence by Open System Dynamics
P. J. Dodd, J. J. Halliwell
abstract: The destruction of quantum interference, decoherence, and the destruction of
entanglement both appear to occur under the same circumstances. To address the
connection between these two phenomena, we consider the evolution of arbitrary
initial states of a two-particle system under open system dynamics described by
a class of master equations which produce decoherence of each particle. We show
that all initial states become separable after a finite time, and we produce
the explicit form of the separated state. The result extends and amplifies an
earlier result of Di\'osi. We illustrate the general result by considering the
case in which the initial state is an EPR state (in which both the positions
and momenta of a particle pair are perfectly correlated). This example clearly
illustrates how the spreading out in phase space produced by the environment
leads to certain disentanglement conditions becoming satisfied.
- oai_identifier:
- oai:arXiv.org:quant-ph/0312068
- categories:
- quant-ph
- comments:
- 15 Pages
- doi:
- 10.1103/PhysRevA.69.052105
- arxiv_id:
- quant-ph/0312068
- journal_ref:
- Phys Rev A 69, 052105 (2004)
- report_no:
- Imperial/TP/03-4/7
- created:
- 2003-12-08
Full article ▸
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