TY - JOUR
T1 - New features of entanglement dynamics with initial system-bath correlations
AU - Li, Lin
AU - Zou, Jian
AU - He, Zhi
AU - Li, Jun Gang
AU - Shao, Bin
AU - Wu, Lian Ao
PY - 2012/2/6
Y1 - 2012/2/6
N2 - We investigate the influence of initial correlations between two qubits and a family of baths on the entanglement dynamics of these two qubits. We show that initial system-bath correlations can effectively avoid the occurrence of entanglement sudden death, and for the initial states with quantum correlations the entanglement between two qubits can be larger than its initial value. Significantly, we find that there exist initial states which we called entanglement preserving states, such that, although the state of the qubit subsystem evolves the entanglement of two qubits does not evolves at all.
AB - We investigate the influence of initial correlations between two qubits and a family of baths on the entanglement dynamics of these two qubits. We show that initial system-bath correlations can effectively avoid the occurrence of entanglement sudden death, and for the initial states with quantum correlations the entanglement between two qubits can be larger than its initial value. Significantly, we find that there exist initial states which we called entanglement preserving states, such that, although the state of the qubit subsystem evolves the entanglement of two qubits does not evolves at all.
KW - Entanglement dynamics
KW - Initial system-bath correlations
KW - Open quantum systems
UR - http://www.scopus.com/inward/record.url?scp=84857061354&partnerID=8YFLogxK
U2 - 10.1016/j.physleta.2012.01.002
DO - 10.1016/j.physleta.2012.01.002
M3 - Article
AN - SCOPUS:84857061354
SN - 0375-9601
VL - 376
SP - 913
EP - 918
JO - Physics Letters, Section A: General, Atomic and Solid State Physics
JF - Physics Letters, Section A: General, Atomic and Solid State Physics
IS - 8-9
ER -