Müller Holger, Chiow Sheng-wey, Herrmann Sven, Chu Steven
Department of Physics, University of California, Berkeley, California 94720-7300, USA.
Phys Rev Lett. 2009 Jun 19;102(24):240403. doi: 10.1103/PhysRevLett.102.240403. Epub 2009 Jun 18.
Bloch oscillations (i.e., coherent acceleration of matter waves by an optical lattice) and Bragg diffraction are integrated into light-pulse atom interferometers with large momentum splitting between the interferometer arms, and hence enhanced sensitivity. Simultaneous acceleration of both arms in the same internal states suppresses systematic effects, and simultaneously running a pair of interferometers suppresses the effect of vibrations. Ramsey-Bordé interferometers using four such Bloch-Bragg-Bloch beam splitters exhibit 15% contrast at 24variant Planck's over 2pik splitting, the largest so far (variant Planck's over 2pik is the photon momentum); single beam splitters achieve 88variant Planck's over 2pik. The prospects for reaching 100 s of variant Planck's over 2pik and applications such as gravitational wave sensors are discussed.
布洛赫振荡（即通过光学晶格对物质波进行相干加速）和布拉格衍射被集成到干涉仪臂之间具有大动量分裂的光脉冲原子干涉仪中，从而提高了灵敏度。在相同内部状态下对双臂同时进行加速可抑制系统效应，同时运行一对干涉仪可抑制振动的影响。使用四个这样的布洛赫 - 布拉格 - 布洛赫分束器的拉姆齐 - 博尔德干涉仪在24个约化普朗克常数除以2πk分裂时展现出15%的对比度，这是目前为止最大的（约化普朗克常数除以2πk是光子动量）；单个分束器可实现88个约化普朗克常数除以2πk。文中还讨论了达到100多个约化普朗克常数除以2πk的前景以及诸如引力波传感器等应用。
