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Nature

Shaping atoms in optical lattices

Christopher R. Monroe

Published Jan 1, 1997• 0 citations
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Atomic physics Shaping atoms in optical lattices

Christopher R. Monroe

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In the present work we demonstrate how to realize a 1D closed optical lattice experimentally, including a tunable boundary phase twist. The latter may induce "persistent currents" visible by studying the atoms' momentum distribution. We show how important phenomena in 1D physics can be studied by physical realization of systems of trapped atoms in ring-shaped optical lattices. A mixture of bosonic and/or fermionic atoms can be loaded into the lattice, realizing a generic quantum system of many interacting particles.

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For a series of incoherent and ultracold atoms with an orbital angular momentum (or vortices) released from an optical lattice, we consider the density-density correlation of this freely expanding ultracold gases. Because of the unique phase structure originating from the quantized angular momentum, it is shown that the phase structure plays an important role in the distribution of the density-density correlation through the appearance of crescent-shaped peaks accompanying the ordinary round-shaped peaks. In particular, it is found that the orientation of the crescent-shaped peaks corresponds with the rotation direction of the atoms prepared in the optical lattices.

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Optical Lattices for Optimal Atom Lenses

Chang Jae Lee

Optical lattices have been used for focusing atomic beams to produce arrays of parallel nanowires and nanodots. Atomic dynamics in optical lattice lenses can be treated with either a method analogous to classical ray‐optics or wave mechanics. In this article, we investigate the dynamics by treating atoms quantum mechanically, moving in semiclassical optical lattices. The goal is to provide general conditions for achieving optimal atom focusing. Effects of experimental parameters such as detuning, laser power, and atom–lattice interaction time, and the shape of the optical lattice potentials on atom focusing are studied. Based on these analyses, strategies for achieving optimal atom focusing are provided.

Bulletin of the Korean Chemical Society•Jan 20, 2017•0 citations
In the present work we demonstrate how to realize a 1D closed optical lattice experimentally, including a tunable boundary phase twist. The latter may induce "persistent currents" visible by studying the atoms' momentum distribution. We show how important phenomena in 1D physics can be studied by physical realization of systems of trapped atoms in ring-shaped optical lattices. A mixture of bosonic and/or fermionic atoms can be loaded into the lattice, realizing a generic quantum system of many interacting particles.
For a series of incoherent and ultracold atoms with an orbital angular momentum (or vortices) released from an optical lattice, we consider the density-density correlation of this freely expanding ultracold gases. Because of the unique phase structure originating from the quantized angular momentum, it is shown that the phase structure plays an important role in the distribution of the density-density correlation through the appearance of crescent-shaped peaks accompanying the ordinary round-shaped peaks. In particular, it is found that the orientation of the crescent-shaped peaks corresponds with the rotation direction of the atoms prepared in the optical lattices.
Optical lattices have been used for focusing atomic beams to produce arrays of parallel nanowires and nanodots. Atomic dynamics in optical lattice lenses can be treated with either a method analogous to classical ray‐optics or wave mechanics. In this article, we investigate the dynamics by treating atoms quantum mechanically, moving in semiclassical optical lattices. The goal is to provide general conditions for achieving optimal atom focusing. Effects of experimental parameters such as detuning, laser power, and atom–lattice interaction time, and the shape of the optical lattice potentials on atom focusing are studied. Based on these analyses, strategies for achieving optimal atom focusing are provided.