Exploring local quantum many-body relaxation by atoms in optical superlattices

Abstract

We establish a setting - atoms in optical superlattices with period 2 - in which one can experimentally probe signatures of the process of local relaxation and apparent thermalization in non-equilibrium dynamics without the need of addressing single sites. This opens up a way to explore the convergence of subsystems to maximum entropy states in quenched quantum many-body systems with present technology. Remarkably, the emergence of thermal states does not follow from a coupling to an environment, but is a result of the complex non-equilibrium dynamics in closed systems. We explore ways of measuring the relevant signatures of thermalization in this analogue quantum simulation of a relaxation process, exploiting the possibilities offered by optical superlattices.

4 pages, 3 figures, version to published in Physical Review Letters

References in corpus (21)

• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Non-equilibrium coherence dynamics in one-dimensional Bose gases
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• Lieb-Robinson bounds and the generation of correlations and topological quantum order
• Quench dynamics and non equilibrium phase diagram of the Bose-Hubbard model
• The Luttinger model following a sudden interaction switch-on
• Interaction Quench in the Hubbard model
• Exact relaxation in a class of non-equilibrium quantum lattice systems
• Dephasing and the steady state in quantum many-particle systems
• Quench dynamics across quantum critical points
• Strongly correlated fermions after a quantum quench
• General entanglement scaling laws from time evolution
• Nonthermal steady states after an interaction quench in the Falicov-Kimball model
• Evolution of entanglement after a local quench
• On entropy growth and the hardness of simulating time evolution
• Quantum Many-Body Dynamics of Coupled Double-Well Superlattices
• Bogoliubov theory of quantum correlations in the time-dependent Bose-Hubbard model
• Preparation and detection of magnetic quantum phases in optical superlattices
• Observations Outside the Light-Cone: Algorithms for Non-Equilibrium and Thermal States
• Migration of bosonic particles across a Mott insulator to superfluid phase interface
• Fast initialization of a high-fidelity quantum register using optical superlattices

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• Long time dynamics following a quench in an integrable quantum spin chain: local versus non-local operators and effective thermal behavior
• Quantum Quench from a Thermal Initial State
• Many-body Landau-Zener dynamics in coupled 1D Bose liquids
• Relaxation and thermalization in the one-dimensional Bose-Hubbard model: A case study for the interaction quantum quench from the atomic limit
• Quenches in quantum many-body systems: One-dimensional Bose-Hubbard model reexamined
• Quantum quenches from integrability: the fermionic pairing model
• Fate of Majorana fermions and Chern numbers after a quantum quench
• Relaxation and Thermalization after a Quantum Quench: Why Localization is Important
• Exploiting Quench Dynamics in Spin Chains for Distant Entanglement and Quantum Communication
• Relaxation Dynamics of Disordered Spin Chains: Localization and the Existence of a Stationary State
• Interplay of Soundcone and Supersonic Propagation in Lattice Models with Power Law Interactions
• Emergence of fluctuating hydrodynamics in chaotic quantum systems
• Thermalization in a coherently driven ensemble of two-level systems
• Lieb-Robinson bound and almost-linear light-cone in interacting boson systems
• Non-equilibrium quantum relaxation across a localization-delocalization transition
• Magnetism, coherent many-particle dynamics, and relaxation with ultracold bosons in optical superlattices
• Typical Relaxation of Isolated Many-Body Systems Which Do Not Thermalize
• Relaxation dynamics of an exactly solvable electron-phonon model
• Quench dynamics of one-dimensional interacting bosons in a disordered potential: Elastic dephasing and critical speeding-up of thermalization
• Temporal decay of Neel order in the one-dimensional Fermi-Hubbard model
• Effective light cone and digital quantum simulation of interacting bosons
• Dynamical simulations of charged soliton transport in conjugated polymers with the inclusion of electron-electron interactions
• Equivalence condition for the canonical and microcanonical ensembles in coupled spin systems
• Entanglement witnesses in the XY chain: Thermal equilibrium and postquench nonequilibrium states
• Ultracold Chemistry and its Reaction Kinetics
• Optimal control of many-body quantum dynamics: chaos and complexity
• Evolution of the magnetization after a local quench in the critical transverse-field Ising chain
• Flux enhanced localization and reentrant delocalization in the quench dynamics of two interacting bosons on a Bose-Hubbard ladder
• Transient effects in the backscattered current of a Luttinger liquid
• Adiabatic processes like isothermal processes
• Long-Range Four-body Interactions in Structured Nonlinear Photonic Waveguides
• How to seed ergodic dynamics of interacting bosons under conditions of many-body quantum chaos
• Loading and detecting a three-dimensional Fermi gas in one-dimensional optical superlattice
• Quasi-particle propagation across semiconductor-Mott insulator interfaces
• Rényi entanglement entropy after a quantum quench starting from insulating states in a free boson system
• Propagation of two-particle correlations across the chaotic phase for interacting bosons
• Entanglement entropy dynamics of non-Gaussian states in free boson systems: Random sampling approach
• Observation of strong and weak thermalization in a superconducting quantum processor