Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevLett.89.140401
Title: Contrast interferometry using Bose-Einstein condensates to measure h/m and alpha
Authors: Gupta, S
Dieckmann, K 
Hadzibabic, Z
Pritchard, DE
Keywords: Science & Technology
Physical Sciences
Physics, Multidisciplinary
Physics
OPTICAL FREQUENCY-MEASUREMENT
FINE-STRUCTURE CONSTANT
ELECTRON
HYDROGEN
LASER
Issue Date: 30-Sep-2002
Publisher: AMERICAN PHYSICAL SOC
Citation: Gupta, S, Dieckmann, K, Hadzibabic, Z, Pritchard, DE (2002-09-30). Contrast interferometry using Bose-Einstein condensates to measure h/m and alpha. PHYSICAL REVIEW LETTERS 89 (14) : 140401-. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevLett.89.140401
Abstract: The kinetic energy of an atom recoiling due to absorption of a photon was measured as a frequency, using an interferometric technique called “contrast interferometry.” Optical standing wave pulses were used to create a symmetric three-path interferometer with a Bose-Einstein condensate. Its recoil phase, measurable with a single shot, varies quadratically with additional recoils and is insensitive to errors from vibrations and ac Stark shifts. We have measured the photon recoil frequency of sodium to 7 ppm precision, using a simple realization of this scheme. Plausible extensions should yield sufficient precision to attain a ppb-level determination of [Formula presented] and the fine structure constant [Formula presented]. © 2002 The American Physical Society.
Source Title: PHYSICAL REVIEW LETTERS
URI: https://scholarbank.nus.edu.sg/handle/10635/229540
ISSN: 00319007
10797114
DOI: 10.1103/PhysRevLett.89.140401
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