Quantum decoherence in strongly correlated electron systems

TL;DR

This paper explores how quantum decoherence affects strongly correlated electron systems, revealing the emergence of metastable states like pseudogaps and inhomogeneity through the interplay of superconductivity and spin density waves.

Contribution

It introduces a model analyzing decoherence between localized and itinerant states, linking quantum processes to complex phases in correlated electrons.

Findings

Decoherence leads to coexistence of superconducting and spin density wave states.

Metastable pseudogap phase arises from entropy maximization.

Electronic inhomogeneity is connected to quantum decoherence processes.

Abstract

Complexity in strongly correlated electron systems is analyzed by considering decoherence process between the localized state, |L> and the itinerant state, |I>. The coherent superposition state of a|I> + b|L> decoheres to the pointer states in the proximity of both extremes of the correlation where the symmetry-breaking ground states of the charge pairing emerge. For maximizing the entropy of the system, the superconducting pairing and the spin density wave coexist within the uncertainty principle, which invokes the metastable states as like pseudogap phase and electronic inhomogenity.