Berlin 2014 – scientific programme

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SYQS: Symposium Characterization and control of complex quantum systems

SYQS 2: Characterization and control of complex quantum systems II

SYQS 2.6: Invited Talk

Friday, March 21, 2014, 15:30–16:00, Audimax

Feedback control: from Maxwell's demon to quantum phase transitions — •Tobias Brandes — TU Berlin

I will give an overview of our recent attempts to understand the thermodynamics and quantum mechanics of closed loop (feedback) control. I will discuss a minimal implementation of Maxwell's demon in a solid state system with only four states [1], but also the opposite case of many collective degrees of freedom, i.e. models for phase transitions (Dicke superradiance model [2], quantum Ising chain [3]).

[1] P. Strasberg, G. Schaller, T. Brandes, and M. Esposito, Phys. Rev. Lett. 110, 040601 (2013). [2] T. Brandes, Phys.Rev.E 88 032133 (2013). [3] M. Vogl, G. Schaller, T. Brandes, Phys. Rev. Lett. 109, 240402 (2012).