Spontanous spin squezing in a rubidium BEC

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, despi...

Full description

Saved in:
Bibliographic Details
Published inarXiv.org
Main Authors Laudat, Théo, Dugrain, Vincent, Mazzoni, Tommaso, Meng-Zi Huang, Garrido Alzar, Carlos L, Sinatra, Alice, Rosenbusch, Peter, Reichel, Jakob
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 20.04.2018
Subjects
Atom interferometry
Compressing
Entanglement
Physics - Quantum Gases
Physics - Quantum Physics
Rubidium
Online AccessGet full text

Cover

More Information
Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.1804.07536