An atom interferometer driven by a picosecond frequency comb

Abstract

We demonstrate a light-pulse atom interferometer based on the diffraction of free-falling atoms by a picosecond frequency-comb laser. More specifically, we coherently split and recombine wave packets of cold ${}^{87}$Rb atoms by driving stimulated Raman transitions between the $|5s{}^2{S}_{1/2},F=1⟩$ and $|5s{}^2{S}_{1/2},F=2⟩$ hyperfine states, using two trains of picosecond pulses in a counter-propagating geometry. We study the impact of the pulses length as well as of the interrogation time onto the contrast of the atom interferometer. Our experimental data are well reproduced by a numerical simulation based on an effective coupling which depends on the overlap between the pulses and the atomic cloud. These results pave the way for extending light-pulse interferometry to transitions in other spectral regions and therefore to other species, for new possibilities in metrology, sensing of gravito-inertial effects and tests of fundamental physics.

References in corpus (13)

• Frequency comb spectroscopy
• Direct Frequency Comb Spectroscopy in the Extreme Ultraviolet
• Extreme ultraviolet frequency comb metrology
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• Improved isotope-shift-based bounds on bosons beyond the Standard Model through measurements of the ${}^2$D${}_{3/2}{-}^2$D${}_{5/2}$ interval in Ca${}^{+}$
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• XUV frequency comb operation in an astigmatism-compensated enhancement cavity
• High-Precision Ramsey-Comb Spectroscopy Based on High-Harmonic Generation

Cited by in corpus (2)

• A large-momentum-transfer matter-wave interferometer to measure the effect of gravity on positronium
• Monte-Carlo simulation for the frequency comb spectrum of an atom laser