Nonlocal quantum memory effects in a correlated multimode field

Understand

We review the model of two qubits coupled locally to an environment which consists of nonlocally correlated field modes [Phys.

• Rev.Lett.
• 108, 210402 (2012)].
• We derive the correct expressions for the reduced dynamics of the two-qubit system and demonstrate that strong nonlocal memory effects are indeed present for suitable initial EPR-type Gaussian environmental states.