Characteristics of Bose-Einstein condensation in an optical lattice
arXiv:0802.0700 · doi:10.1103/PhysRevA.77.043626
Abstract
We discuss several possible experimental signatures of the Bose-Einstein condensation (BEC) transition for an ultracold Bose gas in an inhomogeneous optical lattice. Based on the commonly used time-of-flight imaging technique, we show that the momentum-space density profile in the first Brillouin zone, supplemented by the visibility of interference patterns, provides valuable information about the system. In particular, by crossing the BEC transition temperature, the appearance of a clear bimodal structure sets a qualitative and universal signature of this phase transition. Furthermore, the momentum distribution can also be applied to extract the condensate fraction, which may serve as a promising thermometer in such a system.
12 pages, 13 figures; Revised version with new figures; Phys. Rev. A 77, 043626 (2008)
References in corpus (14)
- Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
- Theory of Bose-Einstein condensation in trapped gases
- Quantum phases in an optical lattice
- Theory of the Weakly Interacting Bose Gas
- Evidence for Superfluidity of Ultracold Fermions in an Optical Lattice
- Phase coherence of an atomic Mott insulator
- Non-equilibrium Gross-Pitaevskii dynamics of boson lattice models
- Condensate fraction in a 2D Bose gas measured across the Mott-insulator transition
- Ultracold atoms confined in an optical lattice plus parabolic potential: a closed-form approach
- Bogoliubov approach to superfluidity of atoms in an optical lattice
- Effective Hamiltonian for fermions in an optical lattice across Feshbach resonance
- Criterion for bosonic superfluidity in an optical lattice
- Single-atom density of states of an optical lattice
- Signal of Bose condensation in an optical lattice at finite temperature
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- Controlled Generation of Nonlinear Resonances through Sinusoidal Lattice Modes in Bose-Einstein Condensate
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- Quantum fluctuations and condensate fraction during the time-of-flight expansion
- Thermal and quantum noncondensate particles near the superfluid to Mott insulator transition
- Tomography of correlation functions for ultracold atoms via time-of-flight images
- Cooperative scattering measurement of coherence in a spatially modulated Bose gas
- Phase transition to Bose-Einstein condensation for a Bosonic gas confined in a combined trap
- Cooling ultracold bosons in optical lattices by spectral transform
- Tunneling of a few strongly repulsive hard-sphere bosons in an optical lattice with tight external harmonic confinement: A quantum Monte Carlo investigation in continuous space
- One Dimensional Magnetized TG Gas Properties in an External Magnetic Field
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