Observation of atom-number fluctuations in optical lattices via quantum collapse and revival dynamics

Abstract

Using the quantum collapse and revival phenomenon of a Bose--Einstein condensate in three-dimensional optical lattices, the atom number statistics on each lattice site are experimentally investigated. We observe an interaction driven time evolution of on-site number fluctuations in a constant lattice potential with the collapse and revival time ratio as the figure of merit. Through a shortcut loading procedure, we prepare a three-dimensional array of coherent states with Poissonian number fluctuations. The following dynamics clearly show the interaction effect on the evolution of the number fluctuations from Poissonian to sub-Poissonian. Our method can be used to create squeezed states which are important in precision measurement.

7 pages, 3 figures

References in corpus (10)

• Atom Interferometers
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Squeezing and entanglement in a Bose-Einstein condensate
• Long Phase Coherence Time and Number Squeezing of two Bose-Einstein Condensates on an Atom Chip
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• Preparing and probing atomic number states with an atom interferometer
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• On-site number statistics of ultracold lattice bosons
• Atomic matter-wave revivals with definite atom number in an optical lattice
• Local and spatially extended sub-Poisson atom number fluctuations in optical lattices

Cited by in corpus (4)

• Full counting statistics and symmetry resolved entanglement for free conformal theories with interface defects
• Critical points of the three-dimensional Bose-Hubbard model from on-site atom number fluctuations
• Interference-induced suppression of particle emission from a Bose-Einstein condensate in lattice with time-periodic modulations
• Dimension Crossing Turbulent Cascade in an Excited Lattice Bose Gas