Bloch振荡原子在环形腔中的反作用驱动输运
Backaction-Driven Transport of Bloch Oscillating Atoms in Ring Cavities
摘要：
我们预言，当施加恒定均匀的偏置力时，与腔内光晶格强耦合的原子玻色-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，其共振地修改了位点到位点的隧穿。为了正确选择参数，产生净原子电流。输运速度的方向可以与偏置力的方向相反，其幅度和方向由泵浦激光器和腔之间的失谐控制。传输也可以通过两个反向传播的行波腔模式的不平衡泵浦来增强。我们的结果增加了冷原子量子模拟工具箱，具有量子传感和计量学的影响。
英文摘要：
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 counter-propagating running wave cavity modes. Our results add to the cold atoms quantum simulation toolbox, with implications for quantum sensing and metrology.
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