High-Resolution Atom Interferometers with Suppressed Diffraction Phases
Journal
Physical Review Letters
Journal Volume
115
Journal Issue
8
Start Page
083002
ISSN
0031-9007
1079-7114
Date Issued
2015-08-20
Author(s)
Abstract
We experimentally and theoretically study the diffraction phase of large-momentum transfer beam splitters in atom interferometers based on Bragg diffraction. We null the diffraction phase and increase the sensitivity of the interferometer by combining Bragg diffraction with Bloch oscillations. We demonstrate agreement between experiment and theory, and a 1500-fold reduction of the diffraction phase, limited by measurement noise. In addition to reduced systematic effects, our interferometer has high contrast with up to 4.4×106 radians of phase difference, and a resolution in the fine structure constant of δα/α=0.25ppb in 25 h of integration time.
SDGs
Publisher
American Physical Society (APS)
Type
journal article