Inflation and gauge field holonomy

被引:11
作者
Barvinsky, Andrey O. [1 ]
Zhitnitsky, Ariel R. [2 ]
机构
[1] Lebedev Phys Inst, Theory Dept, Leninsky Prospect 53, Moscow 119991, Russia
[2] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
基金
俄罗斯基础研究基金会; 加拿大自然科学与工程研究理事会;
关键词
QUANTUM FLUCTUATIONS; COSMOLOGICAL CONSTANT; STANDARD MODEL; QCD; INSTANTONS; CREATION; UNIVERSE; FLATNESS; HORIZON; U(1);
D O I
10.1103/PhysRevD.98.045008
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
We discuss a novel scenario for early cosmology, when the inflationary quasi-de Sitter phase dynamically originates from the initial quantum state represented by the microcanonical density matrix. This genuine quantum effect occurs as a result of the dynamics of the topologically nontrivial sectors in a (conjectured) strongly coupled QCD-like gauge theory in expanding universe. The crucial element of our proposal is the presence in our framework of a nontrivial S-1 which plays the dual role in construction: it defines the periodic gravitational instanton (on the gravity side) and it also defines a nontrivial gauge holonomy (on the gauge side) generating the vacuum energy. The effect is global in nature and cannot be formulated in terms of a gradient expansion in an effective local field theory. We also discuss a graceful exit from holonomy inflation due to the helical instability. The number of e-folds in the holonomy inflation framework is determined by the gauge coupling constant at the moment of inflation, and estimated as N-infl similar to a(-2) (H-0) similar to 10(2). We also comment on the relation of our framework with the noboundary and tunneling cosmological proposals and their recent criticism.
引用
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页数:28
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