Threshold effect and entanglement enhancement through local squeezing of initial separable states in continuous-variable systems
Er, C. H.
Chung, Ning Ning
Chew, Lock Yue
Date of Issue2013
School of Physical and Mathematical Sciences
We investigate the dynamical enhancement of entanglement by means of local squeezing of initial separable Gaussian states in two coupled harmonic oscillator systems. Interestingly, the maximum generation of entanglement between the two modes is not a monotonically increasing function of the squeezing parameter. Instead, there exists a critical degree of squeezing rc for the maximum entanglement to be enhanced. For the coupled oscillator systems considered, we have derived the analytical expressions of rc.