论文标题
旋转传感的生存能力使用Bose-Einstein冷凝物中的声子干涉法
Viability of rotation sensing using phonon interferometry in Bose-Einstein condensates
论文作者
论文摘要
我们通过测量两个反向传播的声子模式之间的干扰，在环上围绕环围绕着地位上的方位角，证明了使用环形玻色的凝结物作为旋转传感器。我们观察到激发的快速衰变，最多由$ q \ 27 $的质量因素量化。我们使用C场方法对实验进行数字建模，从而允许我们估算最大化传感器性能的参数。我们探索了观察到的声子衰变的阻尼机制，并确定了两个不同的兰道散射过程，这些过程在不同的驱动幅度和温度下占主导地位。我们的模拟表明，即使在零温度限制下，$ Q $也受到声子的强阻尼的限制。我们使用围绕环上的持续电流进行实验性旋转测量。我们证明了来自单个图像的旋转灵敏度最高$δΩ\约0.3 $ rad/s，理论上可实现的值为$ΔΩ\ of $ΔΩ\约0.04 $ rad/s在原子射击量限制中。这是Marti等人获得的Shot-Noise限制$δΩ\ rad/s敏感性的显着改善。 [物理。 Rev. A 91，013602（2015）用于类似设置。
We demonstrate the use of a ring-shaped Bose-Einstein condensate as a rotation sensor by measuring the interference between two counter-propagating phonon modes imprinted azimuthally around the ring. We observe rapid decay of the excitations, quantified by quality factors of at most $Q \approx 27$. We numerically model our experiment using the c-field methodology, allowing us to estimate the parameters that maximise the performance of our sensor. We explore the damping mechanisms underlying the observed phonon decay, and identify two distinct Landau scattering processes that each dominate at different driving amplitudes and temperatures. Our simulations reveal that $Q$ is limited by strong damping of phonons even in the zero temperature limit. We perform an experimental proof-of-principle rotation measurement using persistent currents imprinted around the ring. We demonstrate a rotation sensitivity of up to $ΔΩ\approx 0.3$ rad/s from a single image, with a theoretically achievable value of $ΔΩ\approx 0.04$ rad/s in the atomic shot-noise limit. This is a significant improvement over the shot-noise-limited $ΔΩ\approx 1$ rad/s sensitivity obtained by Marti et al. [Phys. Rev. A 91, 013602 (2015)] for a similar setup.
