Particle-Hole Character of the Higgs and Goldstone Modes in Strongly Interacting Lattice Bosons
Abstract
We study the low-energy excitations of the Bose-Hubbard model in the strongly interacting superfluid phase using a Gutzwiller approach. We extract the single-particle and single-hole excitation amplitudes for each mode and report emergent mode-dependent particle-hole symmetry on specific arc-shaped lines in the phase diagram connecting the well-known Lorentz-invariant limits of the Bose-Hubbard model. By tracking the in-phase particle-hole...
Paper Details
Title
Particle-Hole Character of the Higgs and Goldstone Modes in Strongly Interacting Lattice Bosons
Published Date
Feb 15, 2018
Journal
Volume
120
Issue
7
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