CONDENSATION OF FLUCTUATIONS IN A TEMPERATURE QUENCH
Marco Zannetti - U Salerno
in collaboration with
Federico Corberi - U SalernoGiuseppe Gonnella - U BariAntonio Piscitelli - U Napoli
temperature quench
study of fluctuationsduring relaxation• energy• heat
t
T
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FT
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temperature quench
• Brownian Oscillator• Gaussian Model : collection of independent oscillators condensation of fluctuations
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temperature quench
• Brownian Oscillator• Gaussian Model• Large – N Model: mean field of interacting system
no equilibration!
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J.R.Gomez-Solano, A.Petrosyan, S.Ciliberto – PRL 106, 200602 (2011)
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GAUSSIAN
J. Phys. A: Math. Theor. 46, 042001 (2013)
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conclusions and outlook
• Fluctuations of energy and heat after a temperature quench non trivial even in trivial non interacting systems• Condensation of fluctuations is related to the duality fluctuations in unbiased ensemble ↔ average properties in biased ensemble• Effective temperature key quantity – relation with effective temperature from FDR• Mean field qualitatively different from real system (energy unbounded below) - go beyond mean field