Heat flux and information backflow in cold environments
journal contributionposted on 19.02.2018, 13:25 by Rebecca Schmidt, S. Maniscalco, Tapio Ala-NissilaTapio Ala-Nissila
© 2016 American Physical Society. We examine non-Markovian effects in an open quantum system from the point of view of information flow. To this end, we consider the spin-boson model with a cold reservoir, accounting for the exact time-dependent correlations between the system and the bath to study the exchange of information and heat. We use an information-theoretic measure of the relevant memory effects and demonstrate that the information backflow from the reservoir to the system does not necessarily correlate with the backflow of heat. We also examine the influence of temperature and coupling strength on the loss and gain of information between the system and the bath. Finally, we discuss how additional driving changes the backflow of information, giving rise to potential applications in reservoir engineering.
This work was supported by the COST Action MP1209, the Center of Quantum Engineering at Aalto University School of Science, the EU Collaborative project QuProCS (Grant Agreement No. 641277), the Academy of Finland through its Centres of Excellence Programme (2015–2017) under projects No. 284621 and No. 287750, and the Magnus Ehrnrooth Foundation.
- Mathematical Sciences