Infrared dressing in real time: Emergence of anomalous dimensions

Infrared dressing in real time: Emergence of anomalous dimensions
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实时红外敷料:异常尺寸的出现

DOI:
10.1103/physrevd.104.085021
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发表时间:
2021
期刊:
影响因子:
5
通讯作者:
Boyanovsky, Daniel
Boyanovsky, Daniel
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Rai, Mudit;Chen, Lisong;Boyanovsky, Daniel

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本文采用动力学重整化群方法(DRM)研究了非规范理论中红外敷料的时间演化。超级可重整化和可重整化模型的特征是红外发散类似于临界点理论的发散,激发了传播子的重整化群改进,产生了生存概率的幂律衰减。DRM证实了这种衰变,产生了修饰态,并确定了反常维数完全由阈值处谱密度的斜率决定,与紫外行为无关,这表明红外现象具有一定的普遍性。缀饰态是带电量子与无质量量子的纠缠态。纠缠熵是通过追踪未观测到的无质量量子而得到的。它的时间演化由DRM决定,是红外有限的,描述了从初始单粒子到渐近多粒子缀饰态的信息流。我们表明,耦合到费米子场的无质量类轴子粒子的有效场论不具有红外发散,并提供了一个标准的红外发散有效场论的nongauge理论的一个循环。
We implement a dynamical resummation method (DRM) as an extension of the dynamical renormalization group to study the time evolution of infrared dressing in nongauge theories. Super renormalizable and renormalizable models feature infrared divergences similar to those of a theory at a critical point, motivating a renormalization group improvement of the propagator that yields a power-law decay of the survival probability. The DRM confirms this decay, yields the dressed state, and determines that the anomalous dimensionis completely determined by the slope of the spectral density at threshold independent of the ultraviolet behavior, suggesting certain universality for infrared phenomena. The dressed state is an entangled state of the charged and massless quanta. The entanglement entropy is obtained by tracing over the unobserved massless quanta. Its time evolution is determined by the DRM, is infrared finite, and describes the information flow from the initial single particle to the asymptotic multiparticle dressed state. We show that effective field theories of massless axionlike particles coupled to fermion fields do not feature infrared divergences and provide a criterion for infrared divergences in effective field theories valid for nongauge theories up to one loop.
红外发散和量子相干性
DOI: --
发表时间: 2017
期刊: The European Physical Journal C
影响因子: --
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关于红外线灾难的注释
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相干软光子态和红外发散 I. 经典电流。
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初始状态:IR 和共线散度
DOI: --
发表时间: 2006
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