Direct cooling in an optical lattice by amplitude modulation
arXiv:1809.06086 · doi:10.1103/PhysRevA.100.013416
Abstract
We report on a generic cooling technique for atoms trapped in optical lattices. It consists in modulating the lattice depth with a proper frequency sweeping. This filtering technique removes the most energetic atoms, and provides with the onset of thermalization a cooling mechanism reminiscent of evaporative cooling. However, the selection is here performed in quasi-momentum space rather than in position space. Interband selection rules are used to protect the population with a zero quasi-momentum, namely the Bose Einstein condensate. Direct condensation of thermal atoms in an optical lattice is also achieved with this technique. It offers an interesting complementary cooling mechanism for quantum simulations performed with quantum gases trapped in optical lattices.
5 pages, 3 figures
References in corpus (20)
- Atom Interferometers
- Exploring phase coherence in a 2D lattice of Bose-Einstein condensates
- Fermionic atoms in a 3D optical lattice: Observing Fermi-surfaces, dynamics and interactions
- A Bose-Einstein condensate in an optical lattice
- Superfluidity of Bose-Einstein Condensate in An Optical Lattice: Landau-Zener Tunneling and Dynamical Instability
- Laser cooling to quantum degeneracy
- Scattering Theory for Floquet-Bloch States
- Interaction dependent heating and atom loss in a periodically driven optical lattice
- Creation of a Bose-condensed gas of rubidium 87 by laser cooling
- Stability of a Floquet Bose-Einstein condensate in a one-dimensional optical lattice
- Parametric Instability Rates in Periodically-Driven Band Systems
- Avoided level crossing spectroscopy with dressed matter waves
- Parametric instabilities in a 2D periodically-driven bosonic system: Beyond the weakly-interacting regime
- Effective preparation and collisional decay of atomic condensate in excited bands of an optical lattice
- Direct tunneling delay time measurement in an optical lattice
- Cooling atoms in an optical trap by selective parametric excitation
- Matter wave scattering on an amplitude-modulated optical lattice
- Ultrarobust calibration of an optical lattice depth based on a phase shift
- Realization of tunnel barriers for matter waves using spatial gaps
- Band gap structures for matter waves
Cited by in corpus (4)
- Suppressing dissipation in a Floquet-Hubbard system
- Floquet engineering of individual band gaps in an optical lattice using a two-tone drive
- Controlling vortical motion of particles in two-dimensional driven superlattices
- A Lawson-time-splitting extended Fourier pseudospectral method for the Gross-Pitaevskii equation with time-dependent low regularity potential