Light shifts in atomic Bragg diffraction

Abstract

Bragg diffraction of an atomic wave packet in a retroreflective geometry with two counterpropagating optical lattices exhibits a light shift induced phase. We show that the temporal shape of the light pulse determines the behavior of this phase shift: In contrast to Raman diffraction, Bragg diffraction with Gaussian pulses leads to a significant suppression of the intrinsic phase shift due to a scaling with the third power of the inverse Doppler frequency. However, for box-shaped laser pulses, the corresponding shift is twice as large as for Raman diffraction. Our results are based on approximate, but analytical expressions as well as a numerical integration of the corresponding Schrödinger equation.

6 pages, 5 figures

References in corpus (7)

• Atom Interferometry with up to 24-Photon-Momentum-Transfer Beam Splitters
• Test of Equivalence Principle at $10^{-8}$ Level by a Dual-species Double-diffraction Raman Atom Interferometer
• Precision atomic gravimeter based on Bragg diffraction
• Enhancing the area of a Raman atom interferometer using a versatile double-diffraction technique
• Atom-wave diffraction between the Raman-Nath and the Bragg regime: Effective Rabi frequency, losses, and phase shifts
• Testing the universality of free fall with rubidium and ytterbium in a very large baseline atom interferometer
• Off-resonant Raman transitions impact in an atom interferometer