DocumentCode :
2224262
Title :
Effects of chaotic energy band transport on the quantum properties of cold atoms and condensates in an optical lattice with a tilted harmonic trap
Author :
Fromhold, T.M. ; Scott, R.G. ; Bujkiewicz ; Wilkinson, P.B. ; Sheard, F.W.
Author_Institution :
Sch. of Phys. & Astron., Nottingham Univ., UK
fYear :
2002
fDate :
19-24 May 2002
Firstpage :
89
Lastpage :
90
Abstract :
Summary form only given. Since optical lattices can be used to investigate both classical energy band transport and the corresponding quantized states, they are ideal for studying the classical-quantum correspondence. Here, we investigate this correspondence for cold sodium atoms in a one-dimensional optical lattice along the x-direction and a three-dimensional harmonic trap. The energy versus crystal momentum dispersion relation for the lowest energy band of the optical lattice, together with the harmonic potential, define an effective Hamiltonian that we use to calculate classical atom paths. When a symmetry axis of the harmonic trap is aligned with the optical lattice, the atoms follow stable trajectories similar to Bloch oscillations But tilting this symmetry axis away from the optical lattice direction induces a transition to strongly chaotic dynamics.
Keywords :
Bose-Einstein condensation; laser cooling; optical chaos; radiation pressure; Bloch oscillations; Bose-Einstein condensates; atom paths; chaotic energy band transport; classical-quantum correspondence; cold atoms; collective time-dependent dynamics; effective Hamiltonian; harmonic potential; one-dimensional lattice; optical lattice; quantum properties; stable trajectories; tilted harmonic trap; Chaos;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2002. QELS '02. Technical Digest. Summaries of Papers Presented at the
Conference_Location :
Long Beach, CA, USA
Print_ISBN :
1-55752-708-3
Type :
conf
DOI :
10.1109/QELS.2002.1031139
Filename :
1031139
Link To Document :
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