Non-dissipative decoherence for quantum carpets

被引:0
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作者
Bonifacio, R [1 ]
Marzoli, I
Schleich, WP
机构
[1] Univ Milan, Dipartimento Fis, Ist Nazl Fis Nucl, I-20133 Milan, Italy
[2] INFM, Sez Milano, I-20133 Milan, Italy
[3] Univ Camerino, Dipartimento Matemat & Fis, I-62032 Camerino, Italy
[4] Univ Camerino, INFM, I-62032 Camerino, Italy
[5] Univ Ulm, Abt Quantenphys, D-89069 Ulm, Germany
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中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We describe decoherence for quantum carpets using a model-independent formalism ruled by a characteristic time tau. We rnd that the rate of decoherence depends critically on the ratio between tau and tau (E) = h/2 sigma (H). When tau = tau (E) << 1 decoherence is very slow, while it becomes very fast for the opposite case. The rate of decoherence is described in terms of the fidelity function.
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页码:2891 / 2904
页数:14
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