Velocity rephased coherences in a longitudinal atom interferometer

Ivan Hromada, William F. Holmgren, Catherine E. Klauss +1 more

Jonathan M. Kwolek, Mark Bashkansky, Adam T. Black

Edward T. Smith, Al-Amin Dhirani, David A. Kokorowski +4 more

Localized oscillating fields are beam splitters that can entangle internal and longitudinal momentum states in an atomic beam. Differentially detuned separated oscillatory fields and an am modulator constitute a ``white fringe'' longitudinal interferometer which rephases velocity averaging by a process analogous to half a spin echo. Differentially detuned separated oscillatory fields are used to produce a downstream coherence or rephase an upstream coherence in an atomic beam.

Subhadeep Gupta, David A. Kokorowski, Richard A. Rubenstein +1 more

J�rg Schmiedmayer, Christopher R. Ekstrom, Michael Chapman +2 more

We have used a separated beam atom interferometer to investigate magnetically-induced phase shifts of the different magnetic substates of the sodium ground state. We have observed periodic rephasing of the 8 independent magnetic substates present in an unpolarized sodium beam as the differential magnetic field is increased on opposite sides of the interferometer. We have also demonstrated that two phase shifts with similar velocity dependences can be used to cancel each other, creating an interference pattern from one magnetic substate although an unpolarized beam is sent into the interferometer. Finally we discuss some applications of these techniques.

David E. Pritchard, Michael Chapman, Troy D. Hammond +4 more