Bose polarons near quantum criticality

Abstract

The emergence of quasiparticles in strongly interacting matter represents one of the cornerstones of modern physics. However, when different phases of matter compete near a quantum critical point, the very existence of quasiparticles comes under question. Here we create Bose polarons near quantum criticality by immersing atomic impurities in a Bose-Einstein condensate (BEC) with near-resonant interactions. Using locally-resolved radiofrequency spectroscopy, we probe the energy, spectral width, and short-range correlations of the impurities as a function of temperature. Far below the superfluid critical temperature, the impurities form well-defined quasiparticles. However, their inverse lifetime, given by their spectral width, is observed to increase linearly with temperature at the Planckian scale $\frac{k_{B}T}{\hslash }$, a hallmark of quantum critical behavior. Close to the BEC critical temperature, the spectral width exceeds the binding energy of the impurities, signaling a breakdown of the quasiparticle picture.

17 pages, 14 figures

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• Field-theoretical study of the Bose polaron
• Contact Measurements on Atomic BEC
• Feynman path-integral treatment of the BEC-impurity polaron
• Small polarons in dilute gas Bose-Einstein condensates
• Ultracold Fermionic Feshbach Molecules of ${}^{23}$Na${}^{40}$K
• Bose polarons near quantum criticality
• Impurity in a Bose-Einstein condensate: study of the attractive and repulsive branch using quantum Monte-Carlo methods
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• Quantum Impurity in a Nearly Critical Two Dimensional Antiferromagnet
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• Bipolarons in a Bose-Einstein Condensate
• High temperature expansion applied to fermions near Feshbach resonance
• Variational study of polarons in Bose-Einstein condensates
• Boiling a Unitary Fermi Liquid
• Theory of RF-spectroscopy of strongly interacting Fermions
• Quantum degenerate Bose-Fermi mixture of chemically different atomic species with widely tunable interactions
• Measurement of the Zero Crossing in a Feshbach Resonance of Fermionic 6-Li
• Two and Three-body Contacts in the Unitary Bose Gas
• Interaction-Induced Localization of an Impurity in a Trapped Bose Condensate
• Renormalization group approach to the Fröhlich polaron model: application to impurity-BEC problem
• Analyzing a Bose polaron across resonant interactions
• Short-Time Operator Product Expansion for rf Spectroscopy of a Strongly-interacting Fermi Gas
• Radio-Frequency Transitions on Weakly-Bound Ultracold Molecules
• Spectral response and contact of the unitary Fermi gas
• Theory of finite temperature crossovers near quantum critical points close to, or above, their upper-critical dimension
• Coherence and clock shifts in ultracold Fermi gases with resonant interactions
• Bose polarons at finite temperature and strong coupling
• Diagrammatic Monte Carlo study of the acoustic and the BEC polaron
• p-wave Cooper Pairing of Fermions in Mixtures of Dilute Fermi and Bose Gases
• Analytical description of a trapped semi-ideal Bose gas at finite temperature
• Probing the Spectral Function Using Momentum Resolved Radio Frequency Spectroscopy in Trapped Fermi Gases
• Universality of an impurity in a Bose-Einstein condensate
• The Bose polaron problem: effect of mass imbalance on binding energy
• Observation of a Degenerate Fermi Gas Trapped by a Bose-Einstein Condensate
• Observation of the phononic Lamb shift with a synthetic vacuum
• Contact and sum-rules in a near-uniform Fermi gas at unitarity
• Induced $p$-wave pairing in Bose-Fermi mixtures
• Tunable Fröhlich Polarons of slow-light polaritons in a two-dimensional Bose-Einstein condensate
• Finite-temperature behavior of the Bose polaron
• Quantum Monte Carlo Study of a Resonant Bose-Fermi Mixture
• Quantum phase transition in Bose-Fermi mixtures
• Phase transition of a Bose gas in a harmonic potential
• Quantum critical transport in the unitary Fermi gas
• Bose-Fermi Pair Correlations in Attractively Interacting Bose-Fermi Atomic Mixtures
• Local observation of pair-condensation in a Fermi gas at unitarity
• Single-particle spectral functions in the normal phase of a strongly-attractive Bose-Fermi mixture

Cited by in corpus (165)

• Bose polarons near quantum criticality
• Non-equilibrium quantum dynamics and formation of the Bose polaron
• Transition from a polaronic condensate to a degenerate Fermi gas of heteronuclear molecules
• An optical lattice with sound
• Observation of a smooth polaron-molecule transition in a degenerate Fermi gas
• Mobile impurity in a Bose-Einstein condensate and the orthogonality catastrophe
• Quasiparticle lifetime of the repulsive Fermi polaron
• Polaron Interactions and Bipolarons in One-Dimensional Bose Gases in the Strong Coupling Regime
• Stability and breakdown of Fermi polarons in a strongly interacting Fermi-Bose mixture
• Universal aspects of a strongly interacting impurity in a dilute Bose condensate
• Ionic polaron in a Bose-Einstein condensate
• Theory of a resonantly interacting impurity in a Bose-Einstein condensate
• Strong coupling Bose polarons in a two-dimensional gas
• Quantum mixtures of ultracold gases of neutral atoms
• Quantum behavior of a heavy impurity strongly coupled to a Bose gas
• Charged polarons and molecules in a Bose-Einstein Condensate
• Strong-coupling Bose polarons in 1D: Condensate deformation and modified Bogoliubov phonons
• Non-Hermitian Squeezed Polarons
• Induced correlations between impurities in a one-dimensional quenched Bose gas
• Dynamical quantum Cherenkov transition of fast impurities in quantum liquids
• Dynamical variational approach to Bose polarons at finite temperatures
• Theory of radio-frequency spectroscopy of impurities in quantum gases
• Coherent and dephasing spectroscopy for single-impurity probing of an ultracold bath
• Cold chemistry: a few-body perspective on impurity physics of a single ion in an ultracold bath
• Mediated interaction between polarons in a one-dimensional Bose gas
• From Efimov Physics to the Bose Polaron using Gaussian States
• Heavy polarons in ultracold atomic Fermi superfluids at the BEC-BCS crossover: formalism and applications
• Exact quasiparticle properties of a heavy polaron in BCS Fermi superfluids
• Sub-nK thermometry of an interacting $d$-dimensional homogeneous Bose gas
• Life and death of the Bose polaron
• Pinpointing Feshbach Resonances and Testing Efimov Universalities in ${}^{39}$K
• Mediated interactions and photon bound states in an exciton-polariton mixture
• Quantum dynamics of Bose-polaron in a $d$-dimensional Bose Einstein condensate
• Quench Dynamics of the Ideal Bose Polaron at Zero and Nonzero Temperatures
• Renormalization group study of Bose polarons
• Lattice polarons across the superfluid to Mott insulator transition
• Mediated interactions between ions in quantum degenerate gases
• Crossover polarons in a strongly interacting Fermi superfluid
• Fermi polarons at finite temperature: Spectral function and rf-spectroscopy
• Polaron spectroscopy of a bilayer excitonic insulator
• Sound propagation in a Bose-Fermi mixture: from weak to strong interactions
• Suppression of Unitary Three-body Loss in a Degenerate Bose-Fermi Mixture
• Universal van der Waals Force Between Heavy Polarons in Superfluids
• Pump Probe Spectroscopy of Bose Polarons: Dynamical Formation and Coherence
• Polarons and their induced interactions in highly imbalanced triple mixtures
• Polarons and bipolarons in a two-dimensional square lattice
• Emergence of a sharp quantum collective mode in a one-dimensional Fermi polaron
• Dynamical formation of polarons in a Bose-Einstein condensate: A variational approach
• Ramsey interferometry of non-Hermitian quantum impurities
• Radio-frequency response and contact of impurities in a quantum gas
• Pattern formation in one-dimensional polaron systems and temporal orthogonality catastrophe
• Chemistry of a light impurity in a Bose-Einstein condensate
• The effect of boson-boson interaction on the Bipolaron formation
• Inducing spin-order with an impurity: phase diagram of the magnetic Bose polaron
• Induced interactions and quench dynamics of bosonic impurities immersed in a Fermi sea
• Phase diagram for strong-coupling Bose polarons
• Collective flow of fermionic impurities immersed in a Bose-Einstein Condensate
• Medium-induced Interaction Between Impurities in a Bose-Einstein Condensate
• Radiofrequency spectroscopy of one-dimensional trapped Bose polarons: crossover from the adiabatic to the diabatic regime
• Intersections of ultracold atomic polarons and nuclear clusters: How is a chart of nuclides modified in dilute neutron matter?
• Superconductivity induced by strong electron-exciton coupling in doped atomically thin semiconductor heterostructures
• Strongly interacting Bose-Fermi mixture: mediated interaction, phase diagram and sound propagation
• Observation of $1/k^4$-tails after expansion of Bose-Einstein Condensates with impurities
• Impurities in quasi-one-dimensional droplets of binary Bose mixtures
• Mobile impurities interacting with a few one-dimensional lattice bosons
• Thermodynamics of a dilute Bose gas: A path-integral Monte Carlo study
• Non-equilibrium dynamics of dipolar polarons
• Particle imbalanced weakly interacting quantum droplets in one-dimension
• Strongly interacting impurities in a dilute Bose condensate
• Emergence of Crystalline Few-body Correlations in Mass-imbalanced Fermi Polarons
• Slow dynamics of a mobile impurity interacting with an Anderson insulator
• Spin drag and fast response in a quantum mixture of atomic gases
• Fermi polaron in low-density spin-polarized neutron matter
• Interspecies entanglement with impurity atoms in a lattice gas
• A mobile ion in a Fermi sea
• Bogoliubov excitations driven by thermal lattice phonons in a quantum fluid of light
• Polaron-Depleton Transition in the Yrast Excitations of a One-Dimensional Bose Gas with a Mobile Impurity
• Multidimensional Spectroscopy of Time-Dependent Impurities in Ultracold Fermions
• Analytical approach to the Bose polaron \\ via $q$-deformed Lie algebra
• Rabi oscillations and magnetization of a mobile spin-1/2 impurity in a Fermi sea
• Impurity in a three-dimensional unitary Bose gas
• Phase separation in binary Bose mixtures at finite temperature
• Pattern formation of correlated impurities subjected to an impurity-medium interaction pulse
• Bound impurities in a one-dimensional Bose lattice gas: low-energy properties and quench-induced dynamics
• Dynamics of polaron formation in 1D Bose gases in the strong-coupling regime
• Variational approach to the two-dimensional Bose polaron
• Superfluid flow of polaron polaritons above Landau's critical velocity
• Mobile impurity probing a two-dimensional superfluid phase transition
• Modified mean field ansatz for charged polarons in a Bose-Einstein condensate
• Suppression of Bogoliubov momentum pairing and emergence of non-Gaussian correlations in ultracold interacting Bose gases
• Stochastic dynamics of a few sodium atoms in a cold potassium cloud
• Polaronic Proton and Diproton Clustering in Neutron-Rich Matter
• Dissipative dynamics of an impurity with spin-orbit coupling
• Thermal fading of the $1/k^4$-tail of the momentum distribution induced by the hole anomaly
• Exact result for the polaron mass in a one-dimensional Bose gas
• Stochastic-field approach to the quench dynamics of the one-dimensional Bose polaron
• Bistability of Bose-Fermi mixtures
• Competing few-body correlations in ultracold Fermi polarons
• Finite-range effects in the two-dimensional repulsive Fermi polaron
• Measuring the environment of a Cs qubit with dynamical decoupling sequences
• Emergence of a Bose polaron in a small ring threaded by the Aharonov-Bohm flux
• Exact results for heavy unitary Bose polarons
• Mean-field vs RPA calculation of the energy of an impurity immersed in a spin 1/2 superfluid
• Weakly-interacting Bose-Bose mixtures from the functional renormalisation group
• Universal properties of dipolar Bose polarons in two dimensions
• Bosonic Functional Determinant Approach and its Application to Polaron Spectra
• Quantum Cherenkov transition of finite momentum Bose polarons
• Entangling lattice-trapped bosons with a free impurity: impact on stationary and dynamical properties
• Disorder in order: Localization without randomness in a cold atom system
• General memory kernels and further corrections to the variational path integral approach for the Bogoliubov-Fröhlich Hamiltonian
• Production of dual species Bose-Einstein condensates of ${}^{39}$K and ${}^{87}$Rb
• Polaritons for testing the universality of an impurity in a Bose-Einstein condensate
• Fermi polaron in atom-ion hybrid systems
• Universal quantum dynamics of Bose polarons
• Observation of a Halo Trimer in an Ultracold Bose-Fermi Mixture
• Fermions meet two bosons -- the heteronuclear Efimov effect revisited
• Observation of Magnon-Polarons in the Fermi-Hubbard Model
• Dual Spectroscopy of Quantum Simulated Fermi-Hubbard Systems
• Boson-fermion pairing and condensation in two-dimensional Bose-Fermi mixtures
• A unified theory of strong coupling Bose polarons: From repulsive polarons to non-Gaussian many-body bound states
• Probing polaron clouds by Rydberg atom spectroscopy
• Polarons in Binary Bose-Einstein Condensates
• Temperature-induced miscibility of impurities in trapped Bose gases
• Momentum-dependent quasiparticle properties of the Fermi polaron from the functional renormalization group
• Accelerating analysis of Boltzmann equations using Gaussian mixture models: Application to quantum Bose-Fermi mixtures
• An experimental platform for studying the heteronuclear Efimov effect with an ultracold mixture of ${}^6$Li and ${}^{133}$Cs atoms
• Creation of a degenerate Bose-Bose mixture of erbium and lithium atoms
• Mediated Interactions and Damping Effects in Superfluid Mixtures of Bose and Fermi Gases
• Interaction between an impurity and nonlinear excitations in a polariton condensate
• Nonergodic dynamics for an impurity interacting with bosons in tilted lattice
• Self-stabilized Bose polarons
• Thermally induced localization of dopants in a magnetic spin ladder
• Functional renormalisation group approach to the finite-temperature Bose polaron
• Quantum dynamics of impurities in a Bose-Einstein condensate
• Few particles with an impurity in a one-dimensional harmonic trap
• Linear rotor in an ideal Bose gas near the threshold for binding
• The Gor'kov and Melik-Barkhudarov correction to an imbalanced Fermi gas in the presence of impurities
• An efficient high-current circuit for fast radio-frequency spectroscopy in cold atomic gases
• Excitonic Bose-polarons in electron-hole bilayers
• Polaronic neutron in dilute alpha matter: A $p$-wave Bose polaron
• Medium-enhanced polaron repulsion in a dilute Bose mixture
• Counterflow of lattice polarons in harmonically confined optical lattices
• Mechanical stability of resonant Bose-Fermi mixtures
• Cooling dynamics of a free ion in a Bose-Einstein condensate
• Repulsive Fermi and Bose Polarons in Quantum Gases
• Exploring kinetically induced bound states in triangular lattices with ultracold atoms: spectroscopic approach
• Fast Single-shot Imaging of Individual Ions via Homodyne Detection of Rydberg-Blockade-Induced Absorption
• Magnetic monopole induced polarons in atomic superlattices
• Bound states in two-dimensional Fermi systems with quadratic band touching
• Functional-renormalization-group approach to strongly coupled Bose-Fermi mixtures in two dimensions
• Weak and strong coupling polarons in binary Bose-Einstein condensates
• Polaronic dressing of bound states
• Preparation of quasi-two-dimensional Bose mixture of ultracold ${}^{23}$Na and ${}^{87}$Rb atoms
• Signatures of the orthogonality catastrophe in a coherently driven impurity
• Complex-valued in-medium potential between heavy impurities in ultracold atoms
• Three-body Physics in the Impurity Limit of 39K Bose-Einstein Condensates
• Quasiparticle nature of the Bose polaron at finite temperature
• Bose Polaron in a quantum fluid of light
• Optical response of the supersolid polaron
• Competition of light- and phonon-dressing in microwave-dressed Bose polarons
• Validity of the Fröhlich model for a mobile impurity in a Bose-Einstein condensate
• Quench dynamics and quantum flutter properties of one-dimensional attractive single-spin flipped Fermi gases
• Phenomenological model of decaying Bose polarons
• Particle-hole origin of thermal beating in dipole-compression modes of a 1D Bose gas
• Mobile impurity interacting with a Hubbard chain and the role of Friedel oscillations