Alladi Ramakrishnan Hall

Exploring Thermalization Phenomena: Insights into Closed and Open Quantum Systems

Tanmay Saha

IMSc

In this talk, I will discuss the thermalization phenomena in closed as well as open quantum systems. Starting with the discussion of thermalization in non-integrable closed quantum systems i.e., the eigenstate thermalization hypothesis (ETH), I will highlight the critical role played by entanglement in achieving this closed system thermalization. Afterward, I will shift the discussion to open quantum systems (OQS), as environmental influence is ubiquitous. In the OQS paradigm, we will discuss thermalization through a more general process, called Quantum Homogenization. I will demonstrate how memory effects (non-Markovianity) of the dynamics would affect thermalization, and will then present a qualitative comparison of the same between Markovian and non-Markovian dynamics. Finally, I will shed some light on the process of thermalization via post-Markovian dynamics which is a generalization of Markovian dynamics, incorporating the bath memory effects (hence, it is basically non-Markovian).

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