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Nonsequential Double Ionization of Atoms in Strong Laser Pulses

100%

Prauzner-Bechcicki J., Sacha K., Eckhardt B., Zakrzewski J.

Acta Physica Polonica A

2007

vol. 112

issue 4

699-706

It is now possible to produce laser pulses with reproducible pulse shape and controlled carrier envelope phase. It is discussed how that can be explored in double ionisation studies. To this end we solve numerically the Schrödinger equation for a limited dimensionality model which nevertheless treats electron repulsion qualitatively correctly and allows to study correlation effects due to the Coulomb repulsion.

Quantum Bright Soliton in a Disorder Potential

100%

Sacha K., Delande D., Zakrzewski J.

Acta Physica Polonica A

2009

vol. 116

issue 5

772-778

At very low temperature, a quasi-one-dimensional ensemble of atoms with attractive interactions tend to form a bright soliton. When exposed to a sufficiently weak external potential, the shape of the soliton is not modified, but its external motion is affected. We develop in detail the Bogoliubov approach for the problem, treating, in a non-perturbative way, the motion of the center of mass of the soliton. Quantization of this motion allows us to discuss its long time properties. In particular, in the presence of a disordered potential, the quantum motion of the center of mass of a bright soliton may exhibit Anderson localization, on a localization length which may be much larger than the soliton size and could be observed experimentally.

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 2009

1 2007

1 2006

3 Sacha K.

3 Zakrzewski J.

1 Arlt J.

1 Delande D.

1 Drenkelforth S.

1 Eckhardt B.

1 Ertmer W.

1 Kantian A.

1 Kruse J.

1 Lewenstein M.

1 Prauzner-Bechcicki J.

1 Sanchez-Palencia L.

1 Sanpera A.

1 Santos L.

1 Schulte T.

1 Zoller P.

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Nonsequential Double Ionization of Atoms in Strong Laser Pulses

Quantum Bright Soliton in a Disorder Potential

Cold Atomic Gases in Optical Lattices with Disorder