Cooling a Micromechanical Beam by Coupling it to a Transmission Line

Details Cooling a Micromechanical Beam by Coupling it to a Transmission Line Cooling a Micromechanical Beam by Coupling it to a Transmission Line

2007-06-21

arxiv.org/abs/0706.3100v3

PHYSICAL REVIEW B 76, 205302 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 4 figures

Scientific paper

10.1103/PhysRevB.76.205302

We study a method to cool down the vibration mode of a micro-mechanical beam using a capacitively-coupled superconducting transmission line. The Coulomb force between the transmission line and the beam is determined by the driving microwave on the transmission line and the displacement of the beam. When the frequency of the driving microwave is smaller than that of the transmission line resonator, the Coulomb force can oppose the velocity of the beam. Thus, the beam can be cooled. This mechanism, which may enable to prepare the beam in its quantum ground state of vibration, is feasible under current experimental conditions.

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