Non-equilibrium thermal entanglement in a two-particle system
Anne Ghesquière, Ilya Sinayskiy, Francesco Petruccione · Physica Scripta · 2012
An entangled bipartite Gaussian state is coupled to two thermal reservoirs, one for each particle, and a linear interaction is allowed between the two particles. The reservoirs are assumed to have different dynamics and to be coupled to their particles with different coupling strengths. This allows for a realistic situation where a bipartite state may be shared between two parties who 'keep' their part in different environments. The difference in temperature between the bath creates a non-equilibrium situation that we study via the steady state of the system. We find that the steady state does not exist for all values of the system parameters, and offer an explanation for this behaviour.