论文标题
大型机械膜和低频LC电路之间的固定量子纠缠
Stationary quantum entanglement between a massive mechanical membrane and a low frequency LC circuit
论文作者
论文摘要
我们在一个系统中研究了巨大膜与{\ IT低频} LC谐振器的电力机械纠缠。在光学和电力力学中，巨型（MHz）机械谐振器与Gigahertz（GHz）微波LC谐振器之间的纠缠已广泛且探索，最近在实验中得到了很好的探索。通常，耦合是通过辐射压力样相互作用实现的，并且通过采用适当的微波驱动器而产生纠缠。但是，通过这种方法，在机械和LC振荡器均处于低频（例如1 MHz左右）的情况下，如何创建纠缠尚不明显。在这里，我们提供了一种有效的方法，可以通过将膜与光腔耦合到两个低频谐振器。该腔是由红色驱动激光驱动的，依次冷却机械和电气模式，从而导致在实验可达到的温度下导致固定的电力纠缠。纠缠直接源自电力耦合本身，由于其量子性质，纠缠将允许以比目前更宏观的量表进行量子理论。
We study electro-mechanical entanglement in a system where a massive membrane is capacitively coupled to a {\it low frequency} LC resonator. In opto- and electro-mechanics, the entanglement between a megahertz (MHz) mechanical resonator and a gigahertz (GHz) microwave LC resonator has been widely and well explored, and recently experimentally demonstrated. Typically, coupling is realized through a radiation pressure-like interaction, and entanglement is generated by adopting an appropriate microwave drive. Through this approach it is however not evident how to create entanglement in the case where both the mechanical and LC oscillators are of low frequency, e.g., around 1 MHz. Here we provide an effective approach to entangling two low-frequency resonators by further coupling the membrane to an optical cavity. The cavity is strongly driven by a red-detuned laser, sequentially cooling the mechanical and electrical modes, which results in stationary electro-mechanical entanglement at experimentally achievable temperatures. The entanglement directly originates from the electro-mechanical coupling itself and due to its quantum nature will allow testing quantum theories at a more macroscopic scale than currently possible.
