TY - JOUR
T1 - Entanglement dynamics in open two-qubit systems via diffusive quantum trajectories
AU - Viviescas, Carlos
AU - Guevara, Ivonne
AU - Carvalho, André R.R.
AU - Busse, Marc
AU - Buchleitner, Andreas
PY - 2010/11/17
Y1 - 2010/11/17
N2 - We use quantum diffusive trajectories to prove that the time evolution of two-qubit entanglement under spontaneous emission can be fully characterized by optimal continuous monitoring. We analytically determine this optimal unraveling and derive a deterministic evolution equation for the system's concurrence. Furthermore, we propose an experiment to monitor the entanglement dynamics in bipartite two-level systems and to determine the disentanglement time from a single trajectory.
AB - We use quantum diffusive trajectories to prove that the time evolution of two-qubit entanglement under spontaneous emission can be fully characterized by optimal continuous monitoring. We analytically determine this optimal unraveling and derive a deterministic evolution equation for the system's concurrence. Furthermore, we propose an experiment to monitor the entanglement dynamics in bipartite two-level systems and to determine the disentanglement time from a single trajectory.
UR - http://www.scopus.com/inward/record.url?scp=78349279550&partnerID=8YFLogxK
U2 - 10.1103/PhysRevLett.105.210502
DO - 10.1103/PhysRevLett.105.210502
M3 - Article
SN - 0031-9007
VL - 105
JO - Physical Review Letters
JF - Physical Review Letters
IS - 21
M1 - 210502
ER -