Steering Matter Wave Superradiance with an Ultranarrow-Band Optical Cavity
Steering Matter Wave Superradiance with an Ultranarrow-Band Optical Cavity
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DOI：
10.1103/physrevlett.113.070404
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发表时间：
2014-08-12
影响因子：
8.6
通讯作者：
Hemmerich, A.
中科院分区：
文献类型：
--
作者：
Kessler, H.;Klinder, J.;Hemmerich, A.
在光学谐振腔内制备了超流原子气体，其超远带宽约为单光子反冲能量级。当单色非共振激光束照射原子时，在临界强度以上，腔发射超辐射光脉冲，持续时间约为其光子存储时间的量级。原子被集体散射成离散动量态的相干叠加，可以通过调节腔的共振频率来精确控制。通过适当的脉冲序列，整个原子样品可以以两个反冲动量的倍数集体加速或减速。记录了物质波超辐射开始的不稳定性边界，并用平均场模型解释了它的主要特征。
A superfluid atomic gas is prepared inside an optical resonator with an ultranarrow bandwidth on the order of the single photon recoil energy. When a monochromatic off-resonant laser beam irradiates the atoms, above a critical intensity the cavity emits superradiant light pulses with a duration on the order of its photon storage time. The atoms are collectively scattered into coherent superpositions of discrete momentum states, which can be precisely controlled by adjusting the cavity resonance frequency. With appropriate pulse sequences the entire atomic sample can be collectively accelerated or decelerated by multiples of two recoil momenta. The instability boundary for the onset of matter wave superradiance is recorded and its main features are explained by a mean field model.