Higgs mode in a strongly interacting fermionic superfluid
arXiv:1912.01867 · doi:10.1038/s41567-018-0128-6
Abstract
Higgs and Goldstone modes are possible collective modes of an order parameter upon spontaneously breaking a continuous symmetry. Whereas the low-energy Goldstone (phase) mode is always stable, additional symmetries are required to prevent the Higgs (amplitude) mode from rapidly decaying into low-energy excitations. In high-energy physics, where the Higgs boson has been found after a decades-long search, the stability is ensured by Lorentz invariance. In the realm of condensed--matter physics, particle--hole symmetry can play this role and a Higgs mode has been observed in weakly-interacting superconductors. However, whether the Higgs mode is also stable for strongly-correlated superconductors in which particle--hole symmetry is not precisely fulfilled or whether this mode becomes overdamped has been subject of numerous discussions. Experimental evidence is still lacking, in particular owing to the difficulty to excite the Higgs mode directly. Here, we observe the Higgs mode in a strongly-interacting superfluid Fermi gas. By inducing a periodic modulation of the amplitude of the superconducting order parameter , we observe an excitation resonance at frequency . For strong coupling, the peak width broadens and eventually the mode disappears when the Cooper pairs turn into tightly bound dimers signalling the eventual instability of the Higgs mode.
References in corpus (30)
- Observation of the Pairing Gap in a Strongly Interacting Fermi Gas
- Using photoemission spectroscopy to probe a strongly interacting Fermi gas
- Higgs Amplitude Mode in BCS Superconductors NbTiN induced by Terahertz Pulse Excitation
- Amplitude / Higgs Modes in Condensed Matter Physics
- Thermodynamics of the BCS-BEC crossover
- The `Higgs' Amplitude Mode at the Two-Dimensional Superfluid-Mott Insulator Transition
- Quantum Magnets under Pressure: Controlling Elementary Excitations in TlCuCl3
- Observation of a pairing pseudogap in a two-dimensional Fermi gas
- Quantum Monte Carlo Studies of Superfluid Fermi Gases
- Strongly paired fermions: Cold atoms and neutron matter
- Monitoring and manipulating Higgs and Goldstone modes in a supersolid quantum gas
- Visibility of the Amplitude (Higgs) Mode in Condensed Matter
- Determination of the Superfluid Gap in Atomic Fermi Gases by Quasiparticle Spectroscopy
- The Higgs Mode in Disordered Superconductors Close to a Quantum Phase Transition
- Dynamical vanishing of the order parameter in a fermionic condensate
- Quantum Monte Carlo Simulations of the BCS-BEC Crossover at Finite Temperature
- Observation of pair condensation in the quasi-2D BEC-BCS crossover
- Superfluidity and collective modes in a uniform gas of Fermi atoms with a Feshbach resonance
- Probing the excitation spectrum of a Fermi gas in the BCS-BEC crossover regime
- BCS-BEC crossover at finite temperature in the broken-symmetry phase
- Detecting the Amplitude Mode of Strongly Interacting Lattice Bosons by Bragg Scattering
- Goldstone mode and pair-breaking excitations in atomic Fermi superfluids
- Rapid ramps across the BEC-BCS crossover: a novel route to measuring the superfluid gap
- Characterizing the energy gap and demonstrating an adiabatic quench in an interacting spin system
- Evolution of Higgs mode in a Fermion Superfluid with Tunable Interactions
- Low energy monopole Modes of a Trapped atomic Fermi Gas
- Collective excitations of a trapped Fermi gas at finite temperature
- Observability of Higgs Mode in a system without Lorentz invariance
- Effect of the particle-hole channel on BCS--Bose-Einstein condensation crossover in atomic Fermi gases
- Density response of a trapped Fermi gas: a crossover from the pair vibration mode to the Goldstone mode
Cited by in corpus (71)
- The low-energy Goldstone mode in a trapped dipolar supersolid
- Higgs Mode in Superconductors
- Collective Excitations and Nonequilibrium Phase Transition in Dissipative Fermionic Superfluids
- The Fate of the Higgs Mode in a Trapped Dipolar Supersolid
- Infrared activation of the Higgs mode by supercurrent injection in superconducting NbN
- Excitation Spectrum and Superfluid Gap of an Ultracold Fermi Gas
- Observing the emergence of a quantum phase transition -- shell by shell
- Collective Modes in Excitonic Insulators: Effects of Electron-Phonon Coupling and Signatures in Optical Response
- Parametric excitation of an optically silent Goldstone-like phonon mode
- Pair-Breaking Collective Branch in BCS Superconductors and Superfluid Fermi Gases
- Emergent parametric resonances and time-crystal phases in driven BCS systems
- Observing dynamical phases of BCS superconductors in a cavity QED simulator
- Gap equation with pairing correlations beyond mean field and its equivalence to a Hugenholtz-Pines condition for fermion pairs
- Thermal crossover, transition, and coexistence in Fermi polaronic spectroscopies
- A Holographic Superfluid Symphony
- Persistent oscillations of the order parameter and interaction quench phase diagram for a confined Bardeen-Cooper-Schrieffer Fermi gas
- Generalized Higgs mechanism in long-range interacting quantum systems
- Population inversion and dynamical phase transitions in a driven superconductor
- Dynamical phases transitions in periodically driven Bardeen-Cooper-Schrieffer systems
- Dynamics of a Fermi gas quenched to unitarity
- Dynamical structure factors of a two-dimensional Fermi superfluid within random phase approximation
- Spectral fingerprints of the non-linear dynamics of driven superconductors with dissipation
- Following the Higgs mode across the BCS-BEC crossover in two dimensions
- Pairing dynamics and solitonic excitations in collisions of medium-mass, identical nuclei
- Recovering quantum correlations in optical lattices from interaction quenches
- Hidden charge-conjugation, parity, and time-reversal symmetries and massive Goldstone (Higgs) modes in superconductors
- Simulating a Mott insulator using attractive interaction
- Non-equilibrium dynamics across the BEC-BCS crossover
- Magnon Bose-Einstein condensates: from time crystals and quantum chromodynamics to vortex sensing and cosmology
- Mass hierarchy in collective modes of pair-density-wave superconductors
- Engineering Higgs dynamics by spectral singularities
- Excitation of the Higgs Mode in a Superfluid Fermi Gas in the BCS-BEC Crossover
- A compact and fast magnetic coil for the interaction manipulation of quantum gases with Feshbach resonances
- Maximum Energy Growth Rate in Dilute Quantum Gases
- Generation and decay of Higgs mode in a strongly interacting Fermi gas
- Topological Micromotion of Floquet Quantum Systems
- Exciting the Higgs mode in a strongly-interacting Fermi gas by interaction modulation
- Decay and revival of a transient trapped Fermi condensate
- Quench-induced spontaneous currents in rings of ultracold fermionic atoms
- Probing two Higgs oscillations in a one-dimensional Fermi superfluid with Raman-type spin-orbit coupling
- Pair-amplitude dynamics in strongly-coupled superconductor-quantum dot hybrids
- Direct observation of the quantum-fluctuation driven amplitude mode in a microcavity polariton condensate
- Non-local correlation and entanglement of ultracold bosons in the two-dimensional Bose-Hubbard lattice at finite temperature
- Chirped amplitude mode in photo-excited superconductors
- Long-lived Higgs modes in strongly correlated condensates
- Phase diagram of non-Hermitian BCS superfluids in a dissipative asymmetric Hubbard model
- Collisionless dynamics of superconducting gap excited by spin-splitting field
- Exciting the long-lived Higgs mode in superfluid Fermi gases with particle removal
- BCS-BCS crossover between atomic and molecular superfluids in a Bose-Fermi mixture
- Detecting the phase transition in a strongly-interacting Fermi gas by unsupervised machine learning
- Dynamic structure factor of two-dimensional Fermi superfluid with Rashba spin-orbit coupling
- Vortex and soliton dynamics in particle-hole symmetric superfluids
- Higgs and Nambu-Goldstone modes in condensed matter physics
- Damping of the Anderson-Bogolyubov mode by spin and mass imbalance in Fermi mixtures
- Higgs response and pair condensation energy in superfluid nuclei
- Tuning Dissipation and Excitations in Superfluid Fermi Gases with a Moving Impurity
- Attenuating Dynamics of Strongly Interacting Fermionic Superfluids in SYK Solvable Models
- Spatially resolved collective modes in d-wave superconductors
- Hybrid-pair superfluidity in a strongly driven Fermi gas
- Spectrum of density, spin and pairing fluctuations of an attractive two-dimensional Fermi gas
- Hybridization of the amplitude mode in a confined fermionic superfluid
- Optical absorption activated by an ultrashort half-cycle pulse in metallic and superconducting states of the Hubbard model
- Collective terahertz fluctuation modes in a polariton laser
- Bragg spectroscopy and pair-breaking-continuum mode in a superfluid Fermi gas
- Linear response of a superfluid Fermi gas inside its pair-breaking continuum
- Probing pair correlations in Fermi gases with Ramsey-Bragg interferometry
- Electron wave functions in beta-decay formulas revisited (II): Completion including recoil-order and induced currents
- Higgs and Nambu-Goldstone modes in a spin-1 model with long-range interactions
- Resonant superfluidity in the Rabi-coupled spin-dependent Fermi-Hubbard model
- Quasiparticle disintegration in fermionic superfluids
- Radio-frequency driving of an attractive Fermi gas in a one-dimensional optical lattice