Quantum spiral bandwidth of entangled two-photon states

被引：197
|
作者：
Torres, JP [1 ]
Alexandrescu, A
Torner, L
机构：
[1] Univ Politecn Cataluna, ICFO, ES-08034 Barcelona, Spain
[2] Univ Politecn Cataluna, Dept Signal Theory & Commun, ES-08034 Barcelona, Spain
来源：
PHYSICAL REVIEW A | 2003年 / 68卷 / 05期
关键词：
D O I：
10.1103/PhysRevA.68.050301
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
We put forward the concept of quantum spiral bandwidth of the spatial mode function of the two-photon entangled state generated in spontaneous parametric down-conversion. We obtain the bandwidth using the eigenstates of the orbital angular momentum of the biphoton states, and reveal its dependence with the length of the down-converting crystals and waist of the pump beam. The connection between the quantum spiral bandwidth and the entropy of entanglement of the quantum state is discussed.
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页数：4
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