Study on quantum thermalization from thermal initial states in a
  superconducting quantum computer
Quantum thermalization in contemporary quantum devices, in particular quantum
computers, has recently attracted significant theoretical interest. Unusual
thermalization processes, such as the Quantum Mpemba Effect (QME), have been
explored theoretically. However, there is a shortage of experimental results
due to the difficulty in preparing thermal states. In this paper, we propose a
method to address this challenge. Moreover, we experimentally validate our
approach using IBM quantum devices, providing results for unusal relaxation in
equidistant quenches as predicted for the IBM qubit. We also assess the
formalism introduced for the QME, obtaining results consistent with the
theoretical predictions. This demonstration underscores that our method can
streamline the investigation of thermal states and thermalization in quantum
physics.
Marc Espinosa Edo Lian-Ao Wu