High-order resonances of the quantum δ-kicked accelerator

Author： Ramareddy V.   Behinaein G.   Talukdar I.   Ahmadi P.   Summy G. S.  

Publisher： Edp Sciences

E-ISSN： 1286-4854|89|3|33001-33001

ISSN： 0295-5075

Source： EPL (EUROPHYSICS LETTERS), Vol.89, Iss.3, 2010-02, pp. : 33001-33001

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

We report the observation of high-order resonances of the quantum δ-kicked accelerator using a BEC kicked by a standing wave of light. The signature of these resonances is the existence of quantum accelerator modes. For the first time quantum accelerator modes were seen near 1/2, 2/3 and 1/3 of the half-Talbot time. Using a BEC enabled the internal momentum state structure of the modes and resonances to be studied for the first time. This structure has many similarities to that present in the fractional Talbot effect. We present a theory for this system based on rephasing of momentum orders and apply it to predict the behavior of the accelerator modes around a resonance of any order.

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