Squeezing on Momentum States for Atom Interferometry

Year: 2018

Authors: Salvi L., Poli N., Vuletic V., Tino GM.

Autors Affiliation: Univ Firenze, Dipartimento Fis & Astron, INFN, Sez Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Italy; Univ Firenze, LENS, INFN, Sez Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Italy; MIT, Dept Phys, Elect Res Lab, Cambridge, MA 02139 USA; CNR, INO, Florence, Italy; CNR, IFAC, Sesto Fiorentino, Italy.

Abstract: We propose and analyze a method that allows for the production of squeezed states of the atomic centerof- mass motion that can be injected into an atom interferometer. Our scheme employs dispersive probing in a ring resonator on a narrow transition in order to provide a collective measurement of the relative population of two momentum states. We show that this method is applicable to a Bragg diffraction-based strontium atom interferometer with large diffraction orders. This technique can be extended also to small diffraction orders and large atom numbers N by inducing atomic transparency at the frequency of the probe field, reaching an interferometer phase resolution scaling Delta phi similar to N-3/4. We show that for realistic parameters it is possible to obtain a 20 dB gain in interferometer phase estimation compared to the standard quantum limit. Our method is applicable to other atomic species where a narrow transition is available or can be synthesized.

Journal/Review: PHYSICAL REVIEW LETTERS

Volume: 120 (3)      Pages from: 33601-1  to: 33601-5

More Information: Maria Luisa Chiofalo, Alice Sinatra, and James K. Thompson are acknowledged for useful discussions. We thank James K. Thompson for pointing out that the EIT method is applicable to a broader class of atomic transitions. This work was supported by INFN and the Italian Ministry of Education, University and Research (MIUR) under the Progetto Premiale Interferometro Atomico and the PRIN 2015 project Interferometro Atomico Avanzato per Esperimenti su Gravita e Fisica Quantistica e Applicazioni alla Geofisica. V.V. acknowledges suppor t by NSF, the NSF-funded Center for Ultracold Atoms, and ONR.
KeyWords: Standard Quantum Limit; Entanglement; Noise; Spectroscopy; Times
DOI: 10.1103/PhysRevLett.120.033601

Citations: 41
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