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Low Energy Excitation Spectra of Trapped Bose Condensates

100%

You L., Hoston W., Lewenstein M., Marinescu M.

Acta Physica Polonica A

1998

vol. 93

issue 1

211-235

We discuss our numerical studies of the low energy excitations of trapped Bose condensates using a Bogoliubov-Hartree treatment. In the zero temperature limit, the lowest few excitation frequencies calculated within the Bogoliubov approximation agree well with the experimental data. Finite temperature results obtained using the Popov approximation display qualitative differences from the experimental data close to the critical temperature region. Details of our numerical approach are presented and comparison with other results is discussed.

Quantum Optics of a Bose-Einstein Condensate

100%

Lewenstein M., You L., Cooper J.

Acta Physica Polonica A

1994

vol. 86

issue 1

173-190

We present a review of recent experimental and theoretical attempts to realize and investigate Bose-Einstein condensation in systems of cooled alkali atoms. We discuss a second quantized theory that describes quantum optics of such systems. We study in detail: (a) the weak field scattering off the condensate; and (b), the probing of the condensate with short laser pulses.

Cold Atomic Gases in Optical Lattices with Disorder

52%

Schulte T., Drenkelforth S., Kruse J., Ertmer W., Arlt J., Kantian A., Sanchez-Palencia L., Santos L., Sanpera A., Sacha K., Zoller P., Lewenstein M., Zakrzewski J.

Acta Physica Polonica A

2006

vol. 109

issue 1

89-99

Cold atomic gases placed in optical lattices enable studies of simple condensed matter theory models with parameters that may be tuned relatively easily. When the optical potential is randomized (e.g. using laser speckle to create a random intensity distribution) one may be able to observe Anderson localization of matter waves for non-interacting bosons, the so-called Bose glass in the presence of interactions, as well as the Fermi glass or quantum spin glass for mixtures of fermions and bosons.

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3 Acta Physica Polonica A

1 2006

1 1998

1 1994

3 Lewenstein M.

2 You L.

1 Arlt J.

1 Cooper J.

1 Drenkelforth S.

1 Ertmer W.

1 Hoston W.

1 Kantian A.

1 Kruse J.

1 Marinescu M.

1 Sacha K.

1 Sanchez-Palencia L.

1 Sanpera A.

1 Santos L.

1 Schulte T.

1 Zakrzewski J.

1 Zoller P.

Search results

Low Energy Excitation Spectra of Trapped Bose Condensates

Quantum Optics of a Bose-Einstein Condensate

Cold Atomic Gases in Optical Lattices with Disorder