High Precision, Quantum-Enhanced Gravimetry with a Bose-Einstein Condensate

We show that the inherently large interatomic interactions of a Bose-Einstein condensate (BEC) can enhance the sensitivity of a high precision cold-atom gravimeter beyond the shot-noise limit (SNL). Through detailed numerical simulation, we demonstrate that our scheme produces spin-squeezed states w...

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Bibliographic Details
Published in:arXiv.org 2020-09
Main Authors: Szigeti, Stuart S, Nolan, Samuel P, Close, John D, Haine, Simon A
Format: Article
Language:English
Subjects:
Bose-Einstein condensates
Computer simulation
Gravimetry
Matter & antimatter
Robustness (mathematics)
Sensitivity enhancement
Shot
Squeezed states (quantum theory)
Online Access:Get full text
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Summary:We show that the inherently large interatomic interactions of a Bose-Einstein condensate (BEC) can enhance the sensitivity of a high precision cold-atom gravimeter beyond the shot-noise limit (SNL). Through detailed numerical simulation, we demonstrate that our scheme produces spin-squeezed states with variances up to 14 dB below the SNL, and that absolute gravimetry measurement sensitivities between 2 and 5 times below the SNL are achievable with BECs between \(10^4\) and \(10^6\) in atom number. Our scheme is robust to phase diffusion, imperfect atom counting, and shot-to-shot variations in atom number and laser intensity. Our proposal is immediately achievable in current laboratories, since it needs only a small modification to existing state-of-the-art experiments and does not require additional guiding potentials or optical cavities.
ISSN:2331-8422
DOI:10.48550/arxiv.2005.00368