University of Birmingham > Talks@bham > Cold atoms > Bringing "quantumness" into thermodynamics and thermometry

Bringing "quantumness" into thermodynamics and thermometry

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  • UserLuis Correa (Exeter)
  • ClockWednesday 13 November 2019, 13:00-14:00
  • HousePhysics East 217.

If you have a question about this talk, please contact Dr Giovanni Barontini.

In the first part of this talk we are going to try to answer the question: “What is quantum in quantum thermodynamics?”. Quantum coherence is commonly seen as the main detectable non-classical signature in a nanoscale thermodynamic device, and it is usually linked to a superior performance at energy conversion. We will argue, however, that the effect of coherences may often be “classically emulated”; i.e., mimicked by a purely classical (stochastic-thermodynamic) model. Interestingly, there are exceptions to this—some quantum energy conversion models cannot be mimicked classically. Nonetheless, these do not seem to be in any way “superior” to their classically emulable counterparts. We will then change gears and discuss how blending methods from open quantum systems with quantum metrology into a theory of “quantum thermometry” can provide practical insights to enhance the precision of temperature sensing. We will focus on impurity thermometry in Bose–Einstein condensates at extreme temperatures in the 1.0–0.2 nK range.

This talk is part of the Cold atoms series.

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