Discording power of Hamiltonian interactions

摘要

We analyze the creation of quantum correlations in a two-qubit system, initially prepared in a classical state, when only one qubit is locally coupled to a bath through a Hamiltonian interaction. We argue that a substantial part of the generated correlations is related to the presence of virtual excitations in the qubit-bath subsystem. The appearance of anti-resonances in the maximum amount of generated quantum correlations is analyzed as a function of the coupling constant.