Wave-function-renormalization effects in resonantly enhanced tunneling
| Autor: | Paolo Facchi, Giuseppe Florio, Saverio Pascazio, Niels Lörch, Oliver Morsch, Donatella Ciampini, Sandro Wimberger, Riccardo Mannella, Ennio Arimondo, Francesco V. Pepe, H. Lignier |
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| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Wave function renormalization Optical lattice NONEXPONENTIAL DECAY Quantum Physics Condensed matter physics TEMPORAL BEHAVIOR Time evolution FOS: Physical sciences OPTICAL LATTICES Atomic and Molecular Physics and Optics Survival probability Ultracold atom Quantum Gases (cond-mat.quant-gas) SEMICONDUCTOR SUPERLATTICES Lattice (order) Atomic and Molecular Physics QUANTUM-FIELD THEORY and Optics Quantum Physics (quant-ph) Condensed Matter - Quantum Gases Quantum tunnelling |
| Zdroj: | Physical review. A 85 (2012): 053602–053602. doi:10.1103/PhysRevA.85.053602 info:cnr-pdr/source/autori:Loerch N. [ 1 ] ; Pepe F.V. [ 2,3,4 ] ; Lignier H. [ 5 ] ; Ciampini D. [ 6,7 ] ; Mannella R. [ 6 ] ; Morsch O. [ 7 ] ; Arimondo E. [ 6,7 ] ; Facchi P. [ 4,8,9 ] ; Florio G. [ 2,3,4 ] ; Pascazio S. [ 2,3,4 ] ; Wimberger S. [ 1,10 ]/titolo:Wave-function-renormalization effects in resonantly enhanced tunneling/doi:10.1103%2FPhysRevA.85.053602/rivista:Physical review. A/anno:2012/pagina_da:053602/pagina_a:053602/intervallo_pagine:053602–053602/volume:85 |
| DOI: | 10.1103/PhysRevA.85.053602 |
| Popis: | We study the time evolution of ultra-cold atoms in an accelerated optical lattice. For a Bose- Einstein condensate with a narrow quasi-momentum distribution in a shallow optical lattice the decay of the survival probability in the ground band has a step-like structure. In this regime we establish a connection between the wave function renormalization parameter Z introduced in [Phys. Rev. Lett. 86, 2699 (2001)] to characterize non-exponential decay and the phenomenon of resonantly enhanced tunneling, where the decay rate is peaked for particular values of the lattice depth and the accelerating force. 12 pages |
| Databáze: | OpenAIRE |
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