Dresden 2011 – wissenschaftliches Programm
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A: Fachverband Atomphysik
A 13: Poster II
A 13.14: Poster
Dienstag, 15. März 2011, 18:00–20:00, P1
Spectral properties of finite, laser-driven lattices of ultra-cold Rydberg atoms — •Wolfgang Zeller2, Nikolas Tezak1,2, Michael Mayle3, and Peter Schmelcher2 — 1Physikalisches Institut, Universität Heidelberg, Philosophenweg 12, 69120 Heidelberg, Germany — 2Zentrum für Optische Quantentechnologien, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 3JILA, NIST and University of Colorado, Boulder, Colorado 80309-0440, USA
We investigate the spectral properties of a finite lattice of coherently excited Rydberg atoms in the frozen Rydberg gas regime. Both uniform as well as multiply-spaced one-dimensional lattices are studied.
In the case of a weak laser coupling we give a comprehensive description for the excitation patterns and degeneracies. We find a multitude of Rydberg states with well-defined excitation properties which are adiabatically accessible starting from the ground state. The precise analysis and knowledge of the spectral features suggest a method to experimentally probe the strong and long-ranged mutual interaction of Rydberg atoms.
In the strong laser regime, the system can be approximated with analytical solutions by performing site-specific rotations and introducing fermionic ladder operators.
Patterned lattices allow us to design certain ground state crossovers involving different Rydberg excitation patterns.