Abstract
A standing-wave light-pulse sequence is demonstrated that places atoms into a superposition of wave packets with precisely controlled displacements that remain constant for times as long as 1 s. The separated wave packets are subsequently recombined, resulting in atom interference patterns that probe energy differences of $\ensuremath{\approx}{10}^{\ensuremath{-}34}$ J and can provide acceleration measurements that are insensitive to platform vibrations.
Highlights
Atom interferometry employs the interference of atomic de Broglie waves for precision measurements [1]
Interferometry experiments using either condensed atoms in a weak trap or noncondensate atoms in a waveguide with precise angular alignments have been shown to have phase-stable interrogation times of ≈50 ms, where the dephasing is induced by inhomogeneities in the confining potential [9,10,11,12]
We have demonstrated a four-pulse grating echo interferometer scheme to study the dephasing effects for atoms confined in a magnetic guide
Summary
Atom interferometry employs the interference of atomic de Broglie waves for precision measurements [1]. Atom interferometry experiments using atoms confined in magnetic waveguides showed that the external state coherence of the atoms decayed quite quickly, limiting interferometric measurements to times
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