Long-lived Higgs modes in strongly correlated condensates
arXiv:2305.19188 · doi:10.1103/PhysRevLett.132.026501
Abstract
We investigate order parameter fluctuations in the Hubbard model within a time-dependent Gutzwiller approach. While in the weak coupling limit we find that the amplitude fluctuations are short-lived due to a degeneracy with the energy of the edge of the quasiparticle continua (and in agreement with Hartree-Fock + RPA theory), these are shifted below the edge upon increasing the interaction. Our calculations therefore predict undamped amplitude (Higgs) oscillations of the order parameter in strongly coupled superconductors, cold atomic fermion condensates and in strongly interacting charge- and spin-density wave systems. We propose an experimental realization for the detection of the spin-type Higgs mode in undoped cuprates and related materials where, due to the Dzyaloshinsky-Moriya interaction, it can couple to an out-of plane ferromagnetic excitation which is visible via the Faraday effect.
6 pages, 5 figures
References in corpus (15)
- Collective excitations of a degenerate gas at the BEC-BCS crossover
- Amplitude / Higgs Modes in Condensed Matter Physics
- Spontaneous Magnon Decays
- Time-Dependent Mean Field Theory for Quench Dynamics in correlated electron systems
- The Higgs Mode in Disordered Superconductors Close to a Quantum Phase Transition
- Higgs mode in a strongly interacting fermionic superfluid
- Nature and Raman signatures of the Higgs amplitude mode in the coexisting superconducting and charge-density-wave state
- Third harmonic generation from collective modes in disordered superconductors
- Theory of antibound states in partially filled narrow band systems
- Current-enabled optical conductivity of superconductors
- THz non-linear optical response in cuprates: predominance of the BCS response over the Higgs mode
- Supercurrent induced resonant optical response
- Charge Transfer and excitations in AgF
- Time-dependent Gutzwiller theory of pairing fluctuations in the Hubbard model
- Engineering Higgs dynamics by spectral singularities