High-Precision Quantum-Enhanced Gravimetry with a Bose-Einstein Condensate
Authors: Szigeti SS., Nolan S.P., Close JD., Haine SA.
Autors Affiliation: Australian Natl Univ, Res Sch Phys, Dept Quantum Sci, Canberra, ACT 2601, Australia; CNR, INO, QSTAR, Largo Enrico Fermi 2, I-50125 Florence, Italy; LENS, Largo Enrico Fermi 2, I-50125 Florence, Italy
Abstract: 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 two and five 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.
Journal/Review: PHYSICAL REVIEW LETTERS
Volume: 125 (10) Pages from: 100402 to: 100402
KeyWords: ATOM INTERFEROMETER; GRAVITATIONAL ACCELERATION; ENTANGLEMENT; STATES; NOISE; REPRESENTATION; GASESDOI: 10.1103/PhysRevLett.125.100402Citations: 11data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2021-10-17References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here