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Quantum Physics Seminar - Gabriele de Chiara: Quantum work distribution in many-body systems

2014.05.21 | Trine Binderup

Date Mon 26 May
Time 14:15 15:30
Location 1520-732

Coffee and cake will be served at 14.05

I will talk about the latest development in quantum thermodynamics regarding the full distribution of work done on a quantum many-body system embodied by chains of harmonic oscillators or spins. I first consider a chain of harmonic oscillators initially uncoupled and in thermal equilibrium. The work done on the system to raise the coupling to a non-zero value is computed. I will discuss the relation between the irreversible work produced and quantum correlations, e.g. entanglement and discord [1]. For a system close to a quantum phase transition, showcased by the 1D transverse Ising model, I will show signatures of criticality in the statistical moments of work and in its characteristic function [2].

[1] A. Carlisle, L. Mazzola, M. Campisi, J. Goold, F. L. Semião, A. Ferraro, F. Plastina, V. Vedral, G. De Chiara, M. Paternostro,  arXiv:1403.0629
[2] L. Fusco, S. Pigeon, T. Apollaro, A. Xuereb, L. Mazzola, M. Campisi, A. Ferraro, M. Paternostro, and G. De Chiara, arXiv:1404.3150.

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