One-Dimensional Quantum Transport Affected by a Background Medium: Fluctuations versus Correlations

Details One-Dimensional Quantum Transport Affected by a Background Medium: Fluctuations versus Correlations One-Dimensional Quantum Transport Affected by a Background Medium: Fluctuations versus Correlations

2009-09-03

arxiv.org/abs/0909.0606v2

Phys. Rev. B 80, 155101 (2009)

Physics

Condensed Matter

Strongly Correlated Electrons

6 pages, 5 figures, final version

Scientific paper

We analyze the spectral properties of a very general two-channel fermion-boson transport model in the insulating and metallic regimes, and the signatures of the metal-insulator quantum phase transition in between. To this end we determine the single particle spectral function related to angle-resolved photoemission spectroscopy, the momentum distribution function, the Drude weight and the optical response by means of a dynamical (pseudo-site) density-matrix renormalization group technique for the one-dimensional half-filled band case. We show how the interplay of correlations and fluctuations in the background medium controls the charge dynamics of the system, which is a fundamental problem in a great variety of advanced materials.

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