1,017 research outputs found
Thermal effects on bipartite and multipartite correlations in fiber coupled cavity arrays
We investigate the thermal influence of fibers on the dynamics of bipartite
and multipartite correlations in fiber coupled cavity arrays where each cavity
is resonantly coupled to a two-level atom. The atom-cavity systems connected by
fibers can be considered as polaritonic qubits. We first derive a master
equation to describe the evolution of the atom-cavity systems. The bipartite
(multipartite) correlations is measured by concurrence and discord (spin
squeezing). Then, we solve the master equation numerically and study the
thermal effects on the concurrence, discord, and spin squeezing of qubits. On
the one hand, at zero temperature, there are steady-state bipartite and
multipartite correlations. One the other hand, the thermal fluctuations of a
fiber may blockade the generation of entanglement of two qubits connected
directly by the fiber while the discord can be generated and stored for a long
time. This thermal-induced blockade effects of bipartite correlations may be
useful for quantum information processing. The bipartite correlations of a
longer chain of qubits is more robust than a shorter one in the presence of
thermal fluctuations
- …