6 S ep 2 00 2 Nonequilibrium Fluctuations and Decoherence in Nanomechanical Devices
نویسندگان
چکیده
We analyze the dynamics of a nanomechanical oscillator coupled to an electrical tunnel junction with an arbitrary voltage applied to the junction and arbitrary temperature of electrons in leads. We obtain the explicit expressions for the fluctuations of oscillator position, its damping/decoherence rate, and the current through the structure. It is shown that quantum heating of the oscillator results in nonlinearity of the current-voltage characteristics. The effects of mechanical vacuum fluctuations are also discussed.
منابع مشابه
ar X iv : h ep - p h / 03 04 01 2 v 1 1 A pr 2 00 3 CHAPTER 1 EVENT BY EVENT FLUCTUATIONS
Contents 1. Introduction 3 2. Fluctuations in a thermal system 6 2.1. Fluctuations in a grand canonical ensemble 6 2.1.1. Fluctuations of the energy and of the conserved charges 7 2.2. Fluctuations in a canonical ensemble 11 2.3. Phase Transitions and Fluctuations 13 3. Other fluctuations 15 3.1. Volume fluctuations 15 3.2. Fluctuation from initial collisions 17 4. Fluctuations and Correlations...
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