Extended Coherence Time with Atom-Number Squeezed Sources

Abstract

Coherence properties of Bose-Einstein condensates offer the potential for improved interferometric phase contrast. However, decoherence effects due to the mean-field interaction shorten the coherence time, thus limiting potential sensitivity. In this work, we demonstrate increased coherence times with number squeezed states in an optical lattice using the decay of Bloch oscillations to probe the coherence time. We extend coherence times by a factor of 2 over those expected with coherent state BEC interferometry. We observe quantitative agreement with theory both for the degree of initial number squeezing as well as for prolonged coherence times.

4 pages, 4 figures

References in corpus (2)

• Characterizing the entanglement of symmetric many-particle spin-1/2 systems
• Mott insulators in strong electric fields

Cited by in corpus (11)

• Squeezing and entanglement in a Bose-Einstein condensate
• Dynamical control of matter-wave tunneling in periodic potentials
• Atom interferometry with a weakly-interacting Bose Einstein condensate
• Spin squeezing in a generalized one-axis twisting model
• Magnetic dipolar interaction in an atomic Bose Einstein condensate interferometer
• Bogoliubov theory of quantum correlations in the time-dependent Bose-Hubbard model
• Relationship between spin squeezing and single-particle coherence in two-component Bose-Einstein condensates with Josephson coupling
• Superfluid properties of a Bose-Einstein condensate in an optical lattice confined in a cavity
• Finite temperature coherence of the ideal Bose gas in an optical lattice
• Coherence Properties of a Bose-Einstein Condensate in an Optical Superlattice
• A number filter for matter-waves