Quantum renormalization group

被引：13
|
作者：
Nagy, S. [1 ]
Polonyi, J. [2 ]
Steib, I. [1 ]
机构：
[1] Univ Debrecen, Dept Theoret Phys, H-4010 Debrecen, Hungary
[2] Strasbourg Univ, CNRS IPHC, F-67037 Strasbourg 2, France
来源：
PHYSICAL REVIEW D | 2016年 / 93卷 / 02期
关键词：
GRAINED EFFECTIVE ACTION; GROUP EQUATION;
D O I：
10.1103/PhysRevD.93.025008
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
The observed IR and the spectator UV particles of a regulated, cutoff quantum field theory are entangled by their interactions; hence, the IR sector can be described by the help of the density matrix only. The tree-level renormalized trajectory is obtained for a self-interacting scalar field theory, containing the mixed state contributions. One needs a sharp cutoff in the momentum space as a regulator to realize the true loss of information caused by massive particles.
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页数：8
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