Scientific Results

Squeezing on Momentum States for Atom Interferometry

Year: 2018

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

Autors Affiliation: [Salvi, Leonardo; Poli, Nicola; Tino, Guglielmo M.] Univ Firenze, Dipartimento Fis & Astron, INFN, Sez Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Italy and Univ Firenze, LENS, INFN, Sez Firenze, Via Sansone 1, I-50019 Sesto Fiorentino, Italy.
[Vuletic, Vladan] MIT, Dept Phys, Elect Res Lab, Cambridge, MA 02139 USA.
[Poli, Nicola] CNR, INO, Florence, Italy.
[Tino, Guglielmo M.] 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.


Volume: 120 (3)      Pages from: 033601-1  to: 033601-5

KeyWords: standard quantum limit; entanglement; noise; spectroscopy; times
DOI: 10.1103/PhysRevLett.120.033601

Citations: 6
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