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Ultracold atom interferometry in space

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arxiv 2101.00972 v2 pith:OVRDFABL submitted 2021-01-04 physics.atom-ph quant-ph

Ultracold atom interferometry in space

classification physics.atom-ph quant-ph
keywords interferometrymatter-wavebecscoherencecondensatesfallfreeobservation
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Bose-Einstein condensates (BECs) in free fall constitute a promising source for space-borne matter-wave interferometry. Indeed, BECs enjoy a slowly expanding wave function, display a large spatial coherence and can be engineered and probed by optical techniques. On a sounding rocket, we explore matter-wave fringes of multiple spinor components of a BEC released in free fall employing light-pulses to drive Bragg processes and induce phase imprinting. The prevailing microgravity played a crucial role in the observation of these interferences which not only reveal the spatial coherence of the condensates but also allow us to measure differential forces. Our work establishes matter-wave interferometry in space with future applications in fundamental physics, navigation and Earth observation.

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