Recoil-Sensitive Lithium Interferometer without a Subrecoil Sample

Kayleigh Cassella, Eric Copenhaver, Brian Estey, Yanying Feng, Chen Lai, Holger Müller
2017 Physical Review Letters  
We report simultaneous conjugate Ramsey-Bord\'e interferometers with a sample of low-mass (lithium-7) atoms at 50 times the recoil temperature. We optically pump the atoms to a magnetically insensitive state using the $2S_{1/2} - 2P_{1/2}$ line. Fast stimulated Raman beam splitters address a broad velocity class and unavoidably drive two conjugate interferometers that overlap spatially. We show that detecting the summed interference signals of both interferometers, using state labeling, allows
more » ... e labeling, allows recoil measurements and suppression of phase noise from vibrations. The use of "warm" atoms allows for simple, efficient, and high-flux atom sources and broadens the applicability of recoil-sensitive interferometry to particles that remain difficult to trap and cool.
doi:10.1103/physrevlett.118.233201 pmid:28644660 fatcat:4ln3bdtgpfavbkl5k4m4u2spje