Decoherence time in high energy heavy ion collisions

被引：14

作者：

Muller, Berndt ^{[1
]}

Schaefer, Andreas

机构：

[1] Duke Univ, Dept Phys, Durham, NC 27708 USA

[2] Univ Regensburg, Inst Theoret Phys, D-93040 Regensburg, Germany

来源：

PHYSICAL REVIEW C | 2006年 / 73卷 / 05期

关键词：

D O I：

10.1103/PhysRevC.73.054905

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

We calculate the decoherence time of the ground state wave function of a nucleus in a high energy heavy ion collision. We define this time as the decay time of the ratio Tr D-2/(Tr D)(2) of traces of the density matrix D. We find that this time is smaller or equal to 1/Q(s), where the saturation scale Q(s) is defined within the color glass condensate model of parton saturation. Our result supports the notion that the extremely rapid entropy production deduced for the early stage of heavy ion collisions at collider energies is to a large extent caused by the decoherence of the initial-state wave functions.

引用

页数：10

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