Backaction-driven transport of Bloch oscillating atoms in ring cavities.
Backaction-driven transport of Bloch oscillating atoms in ring cavities.
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环腔中布洛赫振荡原子的反作用驱动传输。
DOI：
10.1103/physrevlett.113.073003
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发表时间：
2014
影响因子：
8.6
通讯作者：
Goldwin J
中科院分区：
文献类型：
--
作者：
Goldwin J
我们预言，当施加恒定且均匀的偏向力时，强耦合到腔内光学晶格上的玻色-爱因斯坦凝聚体可以发生共振隧穿和定向输运。偏置力诱导布洛赫振荡，引起晶格的振幅和相位调制，从而共振地改变了位到位的隧穿。对于正确的参数选择，会产生净原子电流。传输速度可以与偏向力相反，其幅度和方向由泵浦激光器与腔之间的失谐控制。通过两个反向传播的行波腔模的不平衡泵浦，也可以增强输运。我们的结果增加了冷原子量子模拟工具箱，对量子传感和计量学具有重要意义。
We predict that an atomic Bose-Einstein condensate strongly coupled to an intracavity optical lattice can undergo resonant tunneling and directed transport when a constant and uniform bias force is applied. The bias force induces Bloch oscillations, causing amplitude and phase modulation of the lattice which resonantly modifies the site-to-site tunneling. For the right choice of parameters a net atomic current is generated. The transport velocity can be oriented oppositely to the bias force, with its amplitude and direction controlled by the detuning between the pump laser and the cavity. The transport can also be enhanced through imbalanced pumping of the two counterpropagating running wave cavity modes. Our results add to the cold atoms quantum simulation toolbox, with implications for quantum sensing and metrology.