|
| related topics |
| {energy, state, states} |
| {entanglement, phys, rev} |
| {time, decoherence, evolution} |
| {cos, sin, state} |
| {temperature, thermal, energy} |
| {spin, pulse, spins} |
| {time, wave, function} |
|
Dynamics of Entanglement for One-Dimensional Spin Systems in an External
Time-Dependent Magnetic Field
Zhen Huang, Sabre Kais
abstract: We study the dynamics of entanglement for the XY-model, one-dimensional spin
systems coupled through nearest neighbor exchange interaction and subject to an
external time-dependent magnetic field. Using the two-site density matrix, we
calculate the time-dependent entanglement of formation between nearest neighbor
qubits. We investigate the effect of varying the temperature, the anisotropy
parameter and the external time-dependent magnetic field on the entanglement.
We have found that the entanglement can be localized between nearest neighbor
qubits for certain values of the external time-dependent magnetic field.
Moreover, as known for the magnetization of this model, the entanglement shows
nonergodic behavior, it does not approach its equilibrium value at the infinite
time limit.
- oai_identifier:
- oai:arXiv.org:quant-ph/0505101
- categories:
- quant-ph
- comments:
- 26 pages, 11 figures
- arxiv_id:
- quant-ph/0505101
- created:
- 2005-05-13
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