%0 Generic %1 fouokeng2014dzyaloshinskiimoriya %A Fouokeng, Georges Collince %A Tchoffo, Martin %A Tendong, Edwine %A Fai, Lukong Cornelius %D 2014 %K interesting %T Dzyaloshinskii-Moriya interactions effects on the entanglement dynamics of a two qubit xxz spin system in non-Markovian environment %U http://arxiv.org/abs/1405.7009 %X We investigate the exact entanglement dynamics of a two-qubit Heisenberg XXZ chain with Dzyaloshinskii-Moriya (DM) interactions, interacting with an anisotropic spin bath in thermal equi- librium at a temperature T, driven by an external magnetic field B along the z-axis. We establish that, for an initially entangled qubit pair, the DM interactions generate entanglement and enhance the entanglement in the revival region. The effects of the DM interaction are also seen to be very important at high temperatures and for weak coupling between the two qubits where it is seen to preserve entanglement. These effects are weakened when the magnetic field B and the Heisenberg coupling are switched on. If the two-qubits are prepared in an initially separable state, the DM in- teraction instead has a negative effect on their entanglement. On a whole entanglement can better be preserve in the spin chain even at high temperatures by increases the external magnetic field B and the Heisenberg couplings, and by tuning the strength of the DM interaction.

@misc{fouokeng2014dzyaloshinskiimoriya, abstract = {We investigate the exact entanglement dynamics of a two-qubit Heisenberg XXZ chain with Dzyaloshinskii-Moriya (DM) interactions, interacting with an anisotropic spin bath in thermal equi- librium at a temperature T, driven by an external magnetic field B along the z-axis. We establish that, for an initially entangled qubit pair, the DM interactions generate entanglement and enhance the entanglement in the revival region. The effects of the DM interaction are also seen to be very important at high temperatures and for weak coupling between the two qubits where it is seen to preserve entanglement. These effects are weakened when the magnetic field B and the Heisenberg coupling are switched on. If the two-qubits are prepared in an initially separable state, the DM in- teraction instead has a negative effect on their entanglement. On a whole entanglement can better be preserve in the spin chain even at high temperatures by increases the external magnetic field B and the Heisenberg couplings, and by tuning the strength of the DM interaction.}, added-at = {2014-05-28T08:12:41.000+0200}, author = {Fouokeng, Georges Collince and Tchoffo, Martin and Tendong, Edwine and Fai, Lukong Cornelius}, biburl = {https://www.bibsonomy.org/bibtex/2dfef8efd2da3e302b394151e4a58a758/scavgf}, description = {Dzyaloshinskii-Moriya interactions effects on the entanglement dynamics of a two qubit xxz spin system in non-Markovian environment}, interhash = {98aeb27c8528d578da0c8803deb14876}, intrahash = {dfef8efd2da3e302b394151e4a58a758}, keywords = {interesting}, note = {cite arxiv:1405.7009Comment: arXiv admin note: text overlap with arXiv:cond-mat/0612049 by other authors; and with arXiv:1304.5569 by other authors without attribution}, timestamp = {2014-05-28T08:12:41.000+0200}, title = {Dzyaloshinskii-Moriya interactions effects on the entanglement dynamics of a two qubit xxz spin system in non-Markovian environment}, url = {http://arxiv.org/abs/1405.7009}, year = 2014 }