Physics – Condensed Matter – Strongly Correlated Electrons
Scientific paper
2005-07-19
AIPConf.Proc.850:26-33,2006
Physics
Condensed Matter
Strongly Correlated Electrons
prepared for Proceedings of LT-24, minor corrections after referee report, oral presentation is in http://ltl.tkk.fi/personn
Scientific paper
10.1063/1.2354594
The phenomenon of emergent physics in condensed-matter many-body systems has become the paradigm of modern physics, and can probably also be applied to high-energy physics and cosmology. This encouraging fact comes from the universal properties of the ground state (the analog of the quantum vacuum) in fermionic many-body systems, described in terms of the momentum-space topology. In one of the two generic universality classes of fermionic quantum vacua the gauge fields, chiral fermions, Lorentz invariance, gravity, relativistic spin, and other features of the Standard Model gradually emerge at low energy. The condensed-matter experience provides us with some criteria for selecting the proper theories in particle physics and gravity, and even suggests specific solutions to different fundamental problems. In particular, it provides us with a plausible mechanism for the solution of the cosmological constant problem, which I will discuss in some detail.
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