Cavity-assisted nondestructive laser cooling of atomic qubits
Journal of Physics B: Atomic, Molecular and Optical Physics 37:7 (2004) 1419-1432
Abstract:
We analyse two configurations for laser cooling of neutral atoms whose internal states store qubits. The atoms are trapped in an optical lattice which is placed inside a cavity. We show that the coupling of the atoms to the damped cavity mode can provide a mechanism which leads to cooling of the motion without destroying the quantum information.Cavity Assisted Nondestructive Laser Cooling of Atomic Qubits
Journal of Physics B: Atomic, Molecular and Optical Physics IOP Publishing (2004)
Abstract:
We analyze two configurations for laser cooling of neutral atoms whose internal states store qubits. The atoms are trapped in an optical lattice which is placed inside a cavity. We show that the coupling of the atoms to the damped cavity mode can provide a mechanism which leads to cooling of the motion without destroying the quantum information.Three-dimensional simulation of jet formation in collapsing condensates
Journal of Physics B: Atomic, Molecular and Optical Physics 37:2 (2004) 329-343
Abstract:
We numerically study the behaviour of collapsing and exploding condensates using the parameters of the experiments by Donley et al (2001 Nature 412 295). Our studies are based on a full three-dimensional numerical solution of the Gross-Pitaevskii equation (GPE) including three-body loss. We determine the three-body loss rate from the number of remnant condensate atoms and collapse times, and obtain only one possible value which fits with the experimental results. We then study the formation of jet atoms by interrupting the collapse, and find very good agreement with the experiment. Furthermore, we investigate the sensitivity of the jets to the initial conditions. According to our analysis, the dynamics of the burst atoms is not described by the GPE with three-body loss incorporated.Dynamics of the superfluids to Mott-insulator transition in one dimension
Physical Review A - Atomic, Molecular, and Optical Physics 70:4 (2004)
Abstract:
Dyanamics of the superfluid to Mott-insulator transition in one dimensional lattice was studied numerically. The applicability of time-evolving block decimation (TEBD) algorithm to Bose-Hubbard model was also demonstrated. The results suggest that for slow ramping of the lattice depth the SF growth is consistent with single atom hoping as might naively be expected. It was also suggested that for very rapid ramping of the lattice depth we find that the SF growth is much greater than can be explained by this mechanism.Entangling strings of neutral atoms in 1D atomic pipeline structures.
Phys Rev Lett 91:7 (2003) 073601