A first approach to the open dynamics of bipartite systems

TL;DR

This paper reviews the open quantum dynamics of various bipartite systems, comparing effects of the rotating wave approximation and analyzing their dynamics using the QuTiP Toolbox.

Contribution

It provides a comparative analysis of bipartite quantum systems with and without the rotating wave approximation, using a unified computational platform.

Findings

Counter-rotating terms influence system dynamics

Different bipartite systems exhibit both unique and similar behaviors

Codes for dynamics simulation are provided

Abstract

In this work, we review the open quantum dynamics of the most known bipartite systems, such as the qubit-qubit system, the oscillator-oscillator system, and the qubit-oscillator system. First, we compare each system with and without rotating wave approximation. In this analysis, we observe the influence of the counter-rotating term in the system dynamics. Also, we compare and analyze the resulting dynamics of the three bipartite systems where, due to the nature of each system, different dynamics are observed, but some similarities are also observed between them. To obtain the system dynamics, we use the same platform, the Qutip Toolbox starting from the phenomenological master equation of each system. We made the latter have the same platform for comparison. We attach the codes to generate these dynamics.