Eur. Phys. J. D (2014) 68: 51
https://doi.org/10.1140/epjd/e2014-40771-9

Regular Article

Discording power of Hamiltonian interactions

¹ Departamento de Física, Universidad de Concepción, Casilla 160 - C, Concepción, Chile
² Departamento de Física, Universidad de Guadalajara, Revolución 1500, 44420 Guadalajara, Jalisco, Mexico
³ Center for Optics and Photonics, Esteban Iturra St., 6th Floor, Faculty of Physical Sciences and Mathematics, Universidad de Concepción, Concepción, Chile

^a e-mail: klimov.andrei@gmail.com

Received: 8 December 2013
Published online: 18 March 2014

Abstract

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.