Bose-Einstein Condensation 2023

Quantum-enhanced multiparameter estimation and compressed sensing of a field

13 Sept 2023, 09:55

35m

Hotel Eden Roc

Talk Other Quantum sensing

Speaker

Alice Sinatra (Laboratoire Kastler Brossel Ecole Normale Supérieure)

Description

We show that a significant quantum gain corresponding to squeezed or over-squeezed spin states can be obtained in multiparameter estimation by measuring the Hadamard coefficients of a 1D or 2D signal. The physical platform we consider consists of two-level atoms in an optical lattice in a squeezed-Mott configuration, or more generally by correlated spins distributed in spatially separated modes. Our protocol requires the possibility to locally flip the spins, but relies on collective measurements. We give examples of applications to scalar or vector field mapping and compressed sensing.

Bibliography

{Spin-squeezed states for metrology},
A. Sinatra, Applied Physics Letters, Perspective Letter 120, 120501 (2022).

{Scaling laws for the sensitivity enhancement of non-Gaussian spin states}, Y. Baamara, A. Sinatra, M. Gessner, Phys. Rev. Lett. 127, 160501 (2021).

{Spin-squeezed atomic crystal},
D. Kajtoch, E. Witkowska, A. Sinatra, Europhys. Lett. 123, 20012 (2018).

{Quantum-enhanced multiparameter estimation and compressed sensing of a field}, Y. Baamara, M. Gessner, A. Sinatra, SciPost Physics, 14, 050 (2023).