Laser-like Instabilities in Quantum Nano-electromechanical Systems

Details Laser-like Instabilities in Quantum Nano-electromechanical Systems Laser-like Instabilities in Quantum Nano-electromechanical Systems

2006-09-13

arxiv.org/abs/cond-mat/0609329v2

Phys. Rev. B 74, 201301(R) (2006)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4+ pages, 1 figure; reference to the work of Dykman and Krivoglaz added

Scientific paper

10.1103/PhysRevB.74.201301

We discuss negative damping regimes in quantum nano-electromechanical systems formed by coupling a mechanical oscillator to a single-electron transistor (normal or superconducting). Using an analogy to a laser with a tunable atom-field coupling, we demonstrate how these effects scale with system parameters. We also discuss the fluctuation physics of both the oscillator and the single-electron transistor in this regime, and the degree to which the oscillator motion is coherent.

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