Quantum entanglement due to modulated Dynamical Casimir Effect

Understand

We study the creation and entanglement of quasiparticle pairs due to a periodic variation of the mode frequencies of a homogeneous quantum system.

• Depending on the values of the parameters describing the periodic modulation, the number of created pairs either oscillates or, in a narrow resonant frequency interval, grows exponentially in time.
• For a system initially in a thermal state, we determine in which cases the final state is quantum mechanically entangled, i.e., where the bipartite state is nonseparable.
• We include some weak dissipation, expected to be found in any experimental setup, and study the corresponding reduction of the quantum entanglement.