Experimental investigation of early-time diffusion in the quantum kicked rotor using a Bose-Einstein condensate
| Autor: | Scott Parkins, Mark Sadgrove, Andrew C. Wilson, T. Müller, Rainer Leonhardt, G. J. Duffy |
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| Rok vydání: | 2004 |
| Předmět: |
Physics
Condensed Matter::Quantum Gases Quantum decoherence FOS: Physical sciences Condensed Matter - Soft Condensed Matter Quantum chaos law.invention Momentum diffusion Standing wave Nonlinear Sciences::Chaotic Dynamics Ultracold atom law Quantum mechanics Soft Condensed Matter (cond-mat.soft) Diffusion (business) Quantum Bose–Einstein condensate |
| Zdroj: | Physical review. E, Statistical, nonlinear, and soft matter physics. 70(5 Pt 2) |
| ISSN: | 1539-3755 |
| Popis: | We report the experimental observation of resonances in the early-time momentum diffusion rates for the atom-optical delta-kicked rotor. In this work a Bose-Einstein condensate provides a source of ultra-cold atoms with an ultra-narow initial momentum distribution, which is then subjected to periodic pulses (or "kicks") using an intense far-detuned optical standing wave. A quantum resonance occurs when the momentum eigenstates accumulate the same phase between kicks leading to ballistic energy growth. Conversely, an anti-resonance is observed when the phase accumulated from successive kicks cancels and the system returns to its initial state. Our experimental results are compared with theoretical predictions. 6 pages, 6 figures |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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