Nonmonotonic diffusion rates in an atom-optics Lévy kicked rotor
| Autor: | Chetan Vishwakarma, Jay Mangaonkar, Umakant D. Rapol, Sumit Sarkar, M. S. Santhanam, S. Paul |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Quantum Physics Optical lattice Quantum decoherence Rotor (electric) Condensed Matter - Disordered Systems and Neural Networks Quantum Hall effect Nonlinear Sciences - Chaotic Dynamics 01 natural sciences Classical limit 010305 fluids & plasmas law.invention Nonlinear Sciences::Chaotic Dynamics law Quantum mechanics 0103 physical sciences Atom optics Diffusion (business) 010306 general physics Quantum |
| Zdroj: | Physical Review E. 100 |
| ISSN: | 2470-0053 2470-0045 |
| DOI: | 10.1103/physreve.100.060201 |
| Popis: | The dynamics of chaotic Hamiltonian systems such as the kicked rotor continues to guide our understanding of transport and localization processes. The localized states of the quantum kicked rotor decay due to decoherence effects if subjected to stationary noise. The associated quantum diffusion increases monotonically as a function of a parameter characterising the noise distribution. In this work, for the Levy kicked atom-optics rotor, it is experimentally shown that by tuning a parameter characterizing the Levy distribution, quantum diffusion displays non-monotonic behaviour. The parameters for optimal diffusion rates are analytically obtained and they reveal a good agreement with the cold atom experiments and numerics. The non-monotonicity is shown to be a quantum effect that vanishes in the classical limit. Comment: 5 pages, revtex |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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