Excited-state spectra at the superfluid-insulator transition out of paired condensates
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CitationPowell, Stephen, and Subir Sachdev. 2007. “Excited-State Spectra at the Superfluid-Insulator Transition out of Paired Condensates.” Physical Review A 75 (3). https://doi.org/10.1103/physreva.75.031601.
AbstractWe describe gapped single-particle and collective excitations across a superfluid to insulator quantum phase transition of particles (bosons or fermions) in a periodic potential, with an even number of particles per unit cell. We demonstrate that the dynamics are controlled by a quantum impurity problem of a localized particle interacting with the bulk critical modes. Critical exponents are determined by a renormalization group analysis. We discuss applications to spin oscillations of ultracold atoms in optical lattices and to the electronic phases in the cuprate and related compounds.
Citable link to this pagehttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41417417
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