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cond-mat.dis-nn2021★ 6 cited
Localization of the Higgs mode at the superfluid-Mott glass transition
Jack Crewse, Thomas Vojta
The amplitude (Higgs) mode near the two-dimensional superfluid-Mott glass quantum phase transition is studied. We map the Bose-Hubbard Hamiltonian of disordered interacting bosons…
cond-mat.dis-nn2019★ 11 cited
Collective modes at a disordered quantum phase transition
Martin Puschmann, Jack Crewse, Jose A. Hoyos +1
We study the collective excitations, i.e., the Goldstone (phase) mode and the Higgs (amplitude) mode, near the superfluid--Mott glass quantum phase transition in a two-dimensional…