Entangling the motion of two optically trapped objects via time-modulated driving fields
Entangling the motion of two optically trapped objects via time-modulated driving fields
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DOI：
10.1088/1367-2630/17/1/013056
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发表时间：
2015-01-27
影响因子：
3.3
通讯作者：
Hartmann, Michael J.
中科院分区：
文献类型：
--
作者：
Abdi, Mehdi;Hartmann, Michael J.
我们研究单个腔内两个系留和光学捕获微盘的运动自由度的纠缠。通过正确选择光学腔中被捕获物体的位置并驱动腔的正确模式，可以为系统配备线性和二次光机械耦合。我们证明，两个系留微盘的基本振动模式之间的参数耦合可以通过时间调制输入激光产生。为了正确选择调制频率，该机制可以通过两种模式的挤压过程在很长的时间内驱动微盘的运动进入不可分离的状态。我们在数值上确认了我们的方案对于当前技术的性能，并简要讨论了可用于通过二次耦合检测这种纠缠的实验装置。我们还评论了在光学悬浮纳米球的振荡之间产生这种纠缠的观点。
We study entanglement of the motional degrees of freedom of two tethered and optically trapped microdisks inside a single cavity. By properly choosing the position of the trapped objects in the optical cavity and driving proper modes of the cavity, it is possible to equip the system with linear and quadratic optomechanical couplings. We show that a parametric coupling between the fundamental vibrational modes of two tethered microdisks can be generated via a time-modulated input laser. For a proper choice of the modulation frequency, this mechanism can drive the motion of the microdisks into an inseparable state in the long time limit via a two-mode squeezing process. We numerically confirm the performance of our scheme for current technology and briefly discuss an experimental setup that can be used for detecting this entanglement by employing the quadratic coupling. We also comment on the perspectives for generating such entanglement between the oscillations of optically levitated nanospheres.