A quantum sensor: simultaneous precision gravimetry and magnetic gradiometry with a Bose-Einstein condensate
Abstract
A Bose-Einstein condensate is used as an atomic source for a high precision sensor. A 5× 106 atom F=1 spinor condensate of 87Rb is released into free fall for up to 750ms and probed with a Mach-Zehnder atom interferometer based on Bragg transitions. The Bragg interferometer simultaneously addresses the three magnetic states, | mf=1,0,-1 , facilitating a simultaneous measurement of the acceleration due to gravity with an asymptotic precision of 2.1× 10-9/g and the magnetic field gradient to a precision 8pT/m.
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