TY - JOUR
T1 - Mutual preservation of entanglement
AU - Veitia, Andrzej
AU - Jing, Jun
AU - Yu, Ting
AU - Wong, Chee Wei
PY - 2012/9/10
Y1 - 2012/9/10
N2 - We study a generalized double Jaynes-Cummings (JC) model where two entangled pairs of two-level atoms interact indirectly. We show that there exist initial states of the qubit system so that two entangled pairs are available at all times. In particular, the minimum entanglement in the pairs as a function of the initial state is studied. Finally, we extend our findings to a model consisting of multi-mode atom-cavity interactions. We use a non-Markovian quantum state diffusion (QSD) equation to obtain the steady-state density matrix for the qubits. We show that the multi-mode model also displays dynamical preservation of entanglement.
AB - We study a generalized double Jaynes-Cummings (JC) model where two entangled pairs of two-level atoms interact indirectly. We show that there exist initial states of the qubit system so that two entangled pairs are available at all times. In particular, the minimum entanglement in the pairs as a function of the initial state is studied. Finally, we extend our findings to a model consisting of multi-mode atom-cavity interactions. We use a non-Markovian quantum state diffusion (QSD) equation to obtain the steady-state density matrix for the qubits. We show that the multi-mode model also displays dynamical preservation of entanglement.
KW - Open systems
KW - Quantum entanglement
KW - Quantum optics
UR - http://www.scopus.com/inward/record.url?scp=84866171422&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84866171422&partnerID=8YFLogxK
U2 - 10.1016/j.physleta.2012.08.020
DO - 10.1016/j.physleta.2012.08.020
M3 - Article
AN - SCOPUS:84866171422
SN - 0375-9601
VL - 376
SP - 2755
EP - 2764
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 44
ER -