Quantum Precursor of Shuttle Instability

Details Quantum Precursor of Shuttle Instability Quantum Precursor of Shuttle Instability

2002-12-23

arxiv.org/abs/cond-mat/0212561v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages,1 figure

Scientific paper

The effects of a coupling between the quantized mechanical vibrations of a quantum dot and coherent tunneling of electrons through a single level in the dot are studied. The equation of motion for the reduced density operator describing the vibrational degree of freedom is obtained. It is shown that that the expectation value of the displacement is an oscillating function of time with an exponentially increasing amplitude, which is the signature of a quantum shuttle instability.

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