Dynamics of Nonlocality for A Two-Mode Squeezed State in Thermal   Environment
  We investigate the time evolution of nonlocality for a two-mode squeezed state in the thermal environment. The initial two-mode pure squeezed state is nonlocal with a stronger nonlocality for a larger degree of squeezing. It is found that the larger the degree of initial squeezing is, the more rapidly the squeezed state loses its nonlocality. We explain this by the rapid destruction of quantum coherence for the strongly squeezed state. 
Hyunseok Jeong, Jinhyoung Lee, and M. S. Kim