对称势场中可控三维布朗电动机的证明
Demonstration of a controllable three-dimensional Brownian motor in symmetric potentials
摘要：
我们展示了一个布朗马达，基于冷原子在光晶格，各向同性的随机波动进行整流，以诱导控制原子运动在任意方向。与早期的棘轮效应的演示相反，我们的布朗电机在空间和时间对称的电势中运行，但是时空对称性被电势之间的相移和它们之间的不对称传输速率打破。布朗马达在三维空间中得到了证明，并且噪声引起的漂移在我们的系统中是可控的。
英文摘要：
We demonstrate a Brownian motor, based on cold atoms in optical lattices, where isotropic random fluctuations are rectified in order to induce controlled atomic motion in arbitrary directions. In contrast to earlier demonstrations of ratchet effects, our Brownian motor operates in potentials that are spatially and temporally symmetric, but where spatiotemporal symmetry is broken by a phase shift between the potentials and asymmetric transfer rates between them. The Brownian motor is demonstrated in three dimensions and the noise-induced drift is controllable in our system.
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