Accurate trajectory alignment in cold-atom interferometers with separated laser beams
Autor: | Leonid A. Sidorenkov, Romain Gautier, Arnaud Landragin, Denis Savoie, Remi Geiger, M. Altorio |
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Přispěvatelé: | Systèmes de Référence Temps Espace (SYRTE), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
Rok vydání: | 2019 |
Předmět: |
Wavefront
Physics Quantum Physics Gravitational-wave observatory Physics - Instrumentation and Detectors Atomic Physics (physics.atom-ph) Wave packet FOS: Physical sciences Instrumentation and Detectors (physics.ins-det) Coupling (probability) 01 natural sciences Measure (mathematics) [PHYS.PHYS.PHYS-GEN-PH]Physics [physics]/Physics [physics]/General Physics [physics.gen-ph] 010305 fluids & plasmas Physics - Atomic Physics Interferometry Matter waves and collective properties of cold atoms and molecules Ultracold atom 0103 physical sciences Astronomical interferometer [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] Physics::Atomic Physics Atomic physics 010306 general physics Quantum Physics (quant-ph) |
Zdroj: | Phys.Rev.A Phys.Rev.A, 2020, 101 (3), pp.033606. ⟨10.1103/PhysRevA.101.033606⟩ |
DOI: | 10.48550/arxiv.1912.04793 |
Popis: | Cold-atom interferometers commonly face systematic effects originating from the coupling between the trajectory of the atomic wave packet and the wave front of the laser beams driving the interferometer. Detrimental for the accuracy and the stability of such inertial sensors, these systematics are particularly enhanced in architectures based on spatially separated laser beams. Here we analyze the effect of a coupling between the relative alignment of two separated laser beams and the trajectory of the atomic wave packet in a four-light-pulse cold-atom gyroscope operated in fountain configuration. We present a method to align the two laser beams at the $0.2 \ \mu$rad level and to determine the optimal mean velocity of the atomic wave packet with an accuracy of $0.2\ \textrm{mm}\cdot\textrm{s}^{-1}$. Such fine tuning constrains the associated gyroscope bias to a level of $1\times 10^{-10}~\textrm{rad}\cdot\textrm{s}^{-1}$. In addition, we reveal this coupling using the point-source interferometry technique by analyzing single-shot time-of-flight fluorescence traces, which allows us to measure large angular misalignments between the interrogation beams. The alignment method which we present here can be employed in other sensor configurations and is particularly relevant to emerging gravitational wave detector concepts based on cold-atom interferometry. Comment: 10 pages including appendices, 23 references |
Databáze: | OpenAIRE |
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