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Operational models of ‘temperature superpositions’

The interplay between quantum theory, thermodynamics, and general relativity emerges as a promising direction for new insights as thermalisation processes often arise in scenarios of importance for the interplay of quantum and gravitational physics.

In this talk I will discuss operational approaches to the notion of temperature and thermalisation,  where the notion of temperature is associated with a quantum system serving as a thermometer. I will then put the results in the context of relativity and discuss how they relate to, for example, relativistic observers moving in superpositions of different trajectories and due to inherent relativistic effects thus perceive vacuum as a thermal bath at a `superposition' of temperatures.

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Speaker: Magdalena Zych (Stockholm University)