微机械梁与传输线耦合冷却
Cooling a Micromechanical Beam by Coupling it to a Transmission Line
摘要：
研究了一种利用电容耦合超导传输线冷却微机械梁振动模式的方法。传输线和梁之间的库仑力由传输线上的驱动微波和梁的位移决定。当驱动微波的频率小于传输线谐振器的频率时，库仑力可以对抗梁的速度。因此，可以冷却梁。这种机制，这可能使准备梁在其量子基态的振动，在目前的实验条件下是可行的。
英文摘要：
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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