Decay and recurrence of non-Gaussian correlations in a quantum many-body system
arXiv:2003.01808 · doi:10.1038/s41567-020-01139-2
Abstract
Gaussian models provide an excellent effective description of many quantum many-body systems ranging from condensed matter systems all the way to neutron stars. Gaussian states are common at equilibrium when the interactions are weak. Recently it was proposed that they can also emerge dynamically from a non-Gaussian initial state evolving under non-interacting dynamics. In this work, we present the experimental observation of such a dynamical emergence of Gaussian correlations in a quantum many-body system. This non-equilibrium evolution is triggered by abruptly switching off the effective interaction between the observed collective degrees of freedom, while leaving the interactions between the microscopic constituents unchanged. Starting from highly non-Gaussian correlations, consistent with the sine-Gordon model, we observe a Gaussian state to emerge over time as revealed by the decay of the fourth and sixth order connected correlations in the quantum field. A description of this dynamics requires a novel mechanism for the emergence of Gaussian correlations, which is relevant for a wide class of quantum many-body systems. In our closed system with non-interacting effective degrees of freedom, we do not expect full thermalization. This memory of the initial state is confirmed by observing recurrences of non-Gaussian correlations.
arXiv commentauthor accepted manuscript
References in corpus (27)
- Nonequilibrium dynamics of closed interacting quantum systems
- Observation of many-body localization of interacting fermions in a quasi-random optical lattice
- Quantum many-body systems out of equilibrium
- Time-dependence of correlation functions following a quantum quench
- Relaxation and Pre-thermalization in an Isolated Quantum System
- Matter-wave interferometry in a double well on an atom chip
- Quantum Quench in the Transverse Field Ising Chain
- Experimental Observation of a Generalized Gibbs Ensemble
- Exact relaxation in a class of non-equilibrium quantum lattice systems
- Inter-isotope determination of ultracold rubidium interactions from three high-precision experiments
- Local emergence of thermal correlations in an isolated quantum many-body system
- On solving quantum many-body problems by experiment
- A quantum central limit theorem for non-equilibrium systems: Exact local relaxation of correlated states
- Validity of the GGE for quantum quenches from interacting to noninteracting models
- Linear response theory for a pair of coupled one-dimensional condensates of interacting atoms
- Neutron Matter from Low to High Density
- The dynamics and prethermalization of one dimensional quantum systems probed through the full distributions of quantum noise
- Recurrences in an isolated quantum many-body system
- Designing Arbitrary One-dimensional Potentials on an Atom Chip
- Local relaxation and light-cone-like propagation of correlations in a trapped one-dimensional Bose gas
- Equilibration towards generalized Gibbs ensembles in non-interacting theories
- Relaxation to gaussian and generalized Gibbs states in systems of particles with quadratic hamiltonians
- Double light-cone dynamics establish thermal states in integrable 1D Bose gases
- Non-perturbative method to compute thermal correlations in one-dimensional systems
- Coherence and Josephson oscillations between two tunnel-coupled one-dimensional atomic quasicondensates at finite temperature
- Strong Eigenstate Thermalization within a Generalized Shell in Noninteracting Integrable Systems
- Relaxation to Gaussian Generalized Gibbs Ensembles in Quadratic Bosonic Systems in the Thermodynamic Limit
Cited by in corpus (34)
- Quantum Gases in Optical Boxes
- Atomtronic circuits: from many-body physics to quantum technologies
- Hydrodynamics of weak integrability breaking
- Nonlinear interferometry beyond classical limit facilitated by cyclic dynamics
- Experimental verification of the area law of mutual information in a quantum field simulator
- Quantum field thermal machines
- Generalized hydrodynamics: a perspective
- Experimental Observation of Curved Light-Cones in a Quantum Field Simulator
- Quantum simulation of thermodynamics in an integrated quantum photonic processor
- Quantum nonlinear spectroscopy of single nuclear spins
- Floquet engineering a bosonic Josephson junction
- The sine-Gordon model from coupled condensates: a Generalized Hydrodynamics viewpoint
- Quenches in initially coupled Tomonaga-Luttinger Liquids: a conformal field theory approach
- Perspective on new implementations of atomtronic circuits
- Many-body parametric resonances in the driven sine-Gordon model
- Inelastic decay from integrability
- Thermometry of one-dimensional Bose gases with neural networks
- Generalized-Hydrodynamic approach to Inhomogeneous Quenches: Correlations, Entanglement and Quantum Effects
- Squeezing oscillations in a multimode bosonic Josephson junction
- Experimentally probing Landauer's principle in the quantum many-body regime
- Hamiltonian Learning in Quantum Field Theories
- Identifying diffusive length scales in one-dimensional Bose gases
- Quantifying fermionic interactions from the violation of Wick's theorem
- Resonance triplet dynamics in the quenched unitary Bose gas
- Typical thermalization of low-entanglement states
- Persistent non-Gaussian correlations in out-of-equilibrium Rydberg atom arrays
- Measurement of total phase fluctuation in cold-atomic quantum simulators
- Tunnel-coupled optical microtraps for ultracold atoms
- Anomalous charge transport in the sine-Gordon model
- Sine-Gordon dynamics in spin transport
- Emergence of Gaussianity in the thermodynamic limit of interacting fermions
- Breaking of Huygens-Fresnel principle in inhomogeneous Tomonaga-Luttinger liquids
- Inhomogeneous quantum quenches in the sine-Gordon theory
- Momentum-resolved two-dimensional spectroscopy as a probe of nonlinear quantum field dynamics