Optical lattices: cold atoms ordered by light

Guidoni, L.; Verkerk, P.

doi:10.1088/1464-4266/1/5/201

Cited by 48 publications

(32 citation statements)

References 112 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the numerical complexity of the 3D case, we restrict ourselves to a 1D lin ⊥ lin configuration, reproducing the same alternation of σ + and σ − potential wells (see, e.g., ref. [8]). The time dependence of the cooling process is obtained by considering a series of different histories where the initial momentum of the atom is chosen randomly from a normal distribution corresponding to a temperature of 50 µK.…”

Section: Methodsmentioning

confidence: 99%

Time dependence of laser cooling in optical lattices

et al. 2005

View full text Add to dashboard Cite

We study the dynamics of the cooling of a gas of caesium atoms in an optical lattice, both experimentally and with 1D full-quantum Monte Carlo simulations. We find that, contrary to the standard interpretation of the Sisyphus model, the cooling process does not work by a continuous decrease of the average kinetic energy of the atoms in the lattice. Instead, we show that the momentum of the atoms follows a bimodal distribution, the atoms being gradually transferred from a hot to a cold mode. We suggest that the cooling mechanism should be depicted in terms of a rate model, describing the transfer between the two modes along with the processes occurring within each mode.

show abstract

Section: Methodsmentioning

confidence: 99%

Time dependence of laser cooling in optical lattices

et al. 2005

View full text Add to dashboard Cite

show abstract

“…The FW M signa l exhi bi ts very narro w resona nces at a di stance of a few hundred ki l ohertz fro m the pum p l aser frequency tha t are ba rel y vi sibl e i n the absorpti on spectrum . One of the p ossibl e expl a nati ons of these resona nces i s the e˜ect of opti cal l atti ces (see the revi ew pap er [19]). Six tra ppi ng b eam s create a p eri odi c spati al mo dul a ti on of i ntensi ty and/ or p ol ari zati on of the l i ght Ùeld.…”

Section: Cen T R Al R Eson An Cementioning

confidence: 99%

Nonlinear Spectroscopy of Cold, Trapped Atoms

et al. 2002

View full text Add to dashboard Cite

show abstract

“…However, as the cloud of atoms in a far detuned optical potential [20] is cooled further down, one can obtain a system where quantum effects become relevant. Many studies of quantum ratchets are based on the kicked rotor model [7,16,21,22], which is readily treated numerically.…”

Section: Introductionmentioning

confidence: 99%

Periodically driven quantum ratchets: Symmetries and resonances

et al. 2007

View full text Add to dashboard Cite

We study the quantum version of a tilting and flashing Hamiltonian ratchets, consisting of a periodic potential and a time-periodic driving field. The system dynamics is governed by a Floquet evolution matrix bearing the symmetry of the corresponding Hamiltonian. The dc-current appears due to the desymmetrization of Floquet eigenstates, which become transporting when all the relevant symmetries are violated. Those eigenstates which mostly contribute to a directed transport reside in phase space regions corresponding to classical resonances. Quantum dynamics leads to the dependence of the average velocity on the initial phase of the ac-field. A resonant enhancement (or suppression) of the dc-current, due to avoided crossings between different Floquet states takes place upon tuning some control parameters. Our studies are predominantly aimed at experimental realizations of ac-driven quantum ratchets with cold atoms.

show abstract

Optical lattices: cold atoms ordered by light

Cited by 48 publications

References 112 publications

Time dependence of laser cooling in optical lattices

Time dependence of laser cooling in optical lattices

Nonlinear Spectroscopy of Cold, Trapped Atoms

Periodically driven quantum ratchets: Symmetries and resonances

Contact Info

Product

Resources

About