Particle-hole character of the Higgs and Goldstone modes in strongly-interacting lattice bosons
| Autor: | C. Menotti, M. Di Liberto, Alessio Recati, Nandini Trivedi, Iacopo Carusotto |
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| Rok vydání: | 2017 |
| Předmět: |
QCD vacuum
General Physics and Astronomy FOS: Physical sciences Technicolor 01 natural sciences 010305 fluids & plasmas Superconductivity (cond-mat.supr-con) symbols.namesake Condensed Matter - Strongly Correlated Electrons Critical point (thermodynamics) Quantum mechanics 0103 physical sciences 010306 general physics Boson Quantum Phase Transition Physics Condensed Matter::Quantum Gases Strongly Correlated Electrons (cond-mat.str-el) Physique Condensed Matter - Superconductivity Higgs field Bose-Hubbard model Quantum Gases (cond-mat.quant-gas) Goldstone boson symbols Higgs boson Condensed Matter - Quantum Gases Higgs modes Higgs mechanism |
| Zdroj: | Physical review letters 120 (2018). doi:10.1103/PhysRevLett.120.073201 info:cnr-pdr/source/autori:Di Liberto, M.; Recati, A.; Trivedi, N.; Carusotto, I.; Menotti, C./titolo:Particle-Hole Character of the Higgs and Goldstone Modes in Strongly Interacting Lattice Bosons/doi:10.1103%2FPhysRevLett.120.073201/rivista:Physical review letters (Print)/anno:2018/pagina_da:/pagina_a:/intervallo_pagine:/volume:120 Physical review letters, 120 |
| DOI: | 10.48550/arxiv.1709.06575 |
| Popis: | We study the low-energy excitations of the Bose-Hubbard model in the strongly-interacting superfluid phase using a Gutzwiller approach and extract the single-particle and single-hole excitation amplitudes for each mode. We 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 symmetric oscillations of the order parameter, we provide an answer to the long-standing question about the fate of the pure amplitude Higgs mode away from the integer-density critical point. Furthermore, we point out that out-of-phase oscillations are responsible for a full suppression of the condensate density oscillations of the gapless Goldstone mode. Possible detection protocols are also discussed. Comment: 6 pages, 3 figures |
| Databáze: | OpenAIRE |
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