Damping and decoherence of a nanomechanical resonator due to a few two level systems

Details Damping and decoherence of a nanomechanical resonator due to a few two level systems Damping and decoherence of a nanomechanical resonator due to a few two level systems

2009-07-02

arxiv.org/abs/0907.0431v1

Phys. Rev. B 80, 174103 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1103/PhysRevB.80.174103

We consider a quantum model of a nanomechanical flexing beam resonator interacting with a bath comprising a few damped tunneling two level systems (TLS's). In contrast with a resonator interacting bilinearly with an ohmic free oscillator bath (modeling clamping loss, for example), the mechanical resonator damping is amplitude dependent, while the decoherence of quantum superpositions of mechanical position states depends only weakly on their spatial separation.

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