Spontanous spin squezing in a rubidium BEC
Quantum Gases
2018-08-01 v1 Quantum Physics
Abstract
We describe an experiment where spin squeezing occurs spontaneously within a standard Ramsey sequence driving a two-component Bose-Einstein condensate (BEC) of 87Rb atoms trapped in an elongated magnetic trap. Multiparticle entanglement is generated by state-dependent collisional interactions, despite the near-identical scattering lengths of the spin states in 87Rb. In our proof-of-principle experiment, we observe a metrological spin squeezing that reaches 1.3+/-0.4dB for 5000 atoms, with a contrast of 90+/-1%. The method may be applied to realize spin-squeezed BEC sources for atom interferometry without the need for cavities, state-dependent potentials or Feshbach resonances.
Cite
@article{arxiv.1804.07536,
title = {Spontanous spin squezing in a rubidium BEC},
author = {Théo Laudat and Vincent Dugrain and Tommaso Mazzoni and Meng-Zi Huang and Carlos L. Garrido Alzar and Alice Sinatra and Peter Rosenbusch and Jakob Reichel},
journal= {arXiv preprint arXiv:1804.07536},
year = {2018}
}