Bose-Einstein Condensate Comagnetometer

Year: 2020

Authors: Gomez P., Martin F., Mazzinghi C., Orenes D.B., Palacios S., Mitchell M.W.

Autors Affiliation: Barcelona Inst Sci & Technol, ICFO Inst Ciencies Foton, Castelldefels 08860, Barcelona, Spain; Quside Technol SL, C Esteve Terradas 1,Of 217, Castelldefels, Barcelona, Spain; ICREA, Barcelona 08010, Spain.

Abstract: We describe a comagnetometer employing the f = 1 and f = 2 ground state hyperfine manifolds of a Rb-87 spinor Bose-Einstein condensate as colocated magnetometers. The hyperfine manifolds feature nearly opposite gyromagnetic ratios and thus the sum of their precession angles is only weakly coupled to external magnetic fields, while being highly sensitive to any effect that rotates both manifolds in the same way. The f = 1 and f = 2 transverse magnetizations and azimuth angles are independently measured by nondestructive Faraday rotation probing, and we demonstrate a 44.0(8) dB common-mode rejection in good agreement with theory. We show how the magnetometer coherence time can be extended to similar to 1 s, by using spin-dependent interactions to inhibit hyperfine relaxing collisions between f = 2 atoms. The technique could be used in high sensitivity searches for new physics on submillimeter length scales, precision studies of ultracold collision physics, and angle-resolved studies of quantum spin dynamics.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 124 (17)      Pages from: 170401-1  to: 170401-6

More Information: We thank D. Budker and M. Romalis for helpful discussions. This project was supported by Spanish MINECO projects MAQRO (Grant No. FIS2015-68039-P), OCARINA (Grant No. PGC2018-097056-B-I00) and Q-CLOCKS (Grant No. PCI2018-092973), the Severo Ochoa program (Grant No. SEV-2015-0522); Agencia de Gestio d’Ajuts Universitaris i de Recerca (AGAUR) project (Grant No. 2017-SGR-1354); Fundacio Privada Cellex and Generalitat de Catalunya (CERCA program); Quantum Technology Flagship project MACQSIMAL (Grant No. 820393); Marie Sklodowska-Curie ITN ZULF-NMR (Grant No. 766402); 17FUN03-USOQS, which has received funding from the EMPIR programme cofinanced by the Participating States and from the European Union’s Horizon 2020 research and innovation program.
KeyWords: Search; Limit; Atom
DOI: 10.1103/PhysRevLett.124.170401

Citations: 13
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