Quantum resonances and decoherence for δ-kicked atoms

被引:103
作者
Wimberger, S
Guarneri, I
Fishman, S
机构
[1] Max Planck Inst Phys Komplexer Syst, D-01187 Dresden, Germany
[2] Univ Studi Insubria, I-22100 Como, Italy
[3] Univ Milan, Ist Nazl Fis Mat, I-20133 Milan, Italy
[4] Sez Pavia, Ist Nazl Fis Nucl, I-27100 Pavia, Italy
[5] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel
关键词
D O I
10.1088/0951-7715/16/4/312
中图分类号
O29 [应用数学];
学科分类号
070104 ;
摘要
The quantum resonances occurring with delta-kicked atoms when the kicking period is an integer multiple of the half-Talbot time are analysed in detail. Exact results about the momentum distribution at exact resonance are established, both in the case of totally coherent dynamics and in the case when decoherence is induced by spontaneous emission. A description of the dynamics when the kicking period is close to, but not exactly at resonance, is derived by means of a quasi-classical approximation where the detuning from exact resonance plays the role of the Planck constant. In this way scaling laws describing the shape of the resonant peaks are obtained. Such analytical results are supported by extensive numerical simulations, and explain some recent surprising experimental observations.
引用
收藏
页码:1381 / 1420
页数:40
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