Dressed infrared quantum information

被引：29

作者：

Carney, Daniel ^{[1
,2
,3
]}

Chaurette, Laurent ^{[1
]}

Neuenfeld, Dominik ^{[1
]}

Semenoff, Gordon Walter ^{[1
]}

机构：

[1] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z4, Canada

[2] Univ Maryland, Joint Ctr Quantum Informat & Comp Sci, College Pk, MD 20742 USA

[3] NIST, Joint Quantum Inst, College Pk, MD 20742 USA

来源：

PHYSICAL REVIEW D | 2018年 / 97卷 / 02期

基金：

加拿大自然科学与工程研究理事会;

关键词：

DIVERGENCE;

D O I：

10.1103/PhysRevD.97.025007

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We study information-theoretic aspects of the infrared sector of quantum electrodynamics, using the dressed-state approach pioneered by Chung, Kibble, Faddeev-Kulish, and others. In this formalism QED has an IR-finite S-matrix describing the scattering of electrons dressed by coherent states of photons. We show that measurements sensitive only to the outgoing electronic degrees of freedom will experience decoherence in the electron momentum basis due to unobservable photons in the dressing. We make some comments on possible refinements of the dressed-state formalism, and how these considerations relate to the black hole information paradox.

引用

页数：6

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