2015/09/30 by Longxiang Liu, Kun Chen, Youjin Deng +4 · 1 citation
Chemistry · Physics and Astronomy · #Amplitude #Cold Atom Physics and Bose-Einstein Condensates #Condensed matter physics #Critical point (mathematics) #Goldstone #Higgs boson #Lattice (music) #Monte Carlo method #Optical lattice #Phase transition #Physics #Quantum #Quantum Monte Carlo #Quantum critical point #Quantum mechanics #Quantum phase transition #Quantum, superfluid, helium dynamics #Spectroscopy and Laser Applications #Superfluidity #Ultracold atom #cond-mat.quant-gas #cond-mat.stat-mech #cond-mat.str-el #hep-th
paper · pdf · doi:10.1103/physrevb.92.174521
published as Phys. Rev. B 92, 174521 (2015) · 7 pages, 5 figures
openalex publication_date 2015/11/18 · arxiv created 2015/11/27 · arxiv updated 2015/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/06
The two-dimensional superfluid-to-insulator quantum critical point is expected to be accompanied by a collective Goldstone Higgs mode that is massive. However, experimental confirmation within ultracold atoms in an optical lattice is not straightforward. Using Monte Carlo methods and a comparison with recent experiments, the authors of this paper have found that the signature of this massive mode can be observed in the spectral function of the amplitude response under the right conditions.