Generation and Detection of Atomic Spin Entanglement in Optical Lattices

Abstract

Ultracold atoms in optical lattices offer a great promise to generate entangled states for scalable quantum information processing owing to the inherited long coherence time and controllability over a large number of particles. We report on the generation, manipulation and detection of atomic spin entanglement in an optical superlattice. Employing a spin-dependent superlattice, atomic spins in the left or right sites can be individually addressed and coherently manipulated by microwave pulses with near unitary fidelities. Spin entanglement of the two atoms in the double wells of the superlattice is generated via dynamical evolution governed by spin superexchange. By observing collisional atom loss with in-situ absorption imaging we measure spin correlations of atoms inside the double wells and obtain the lower boundary of entanglement fidelity as $0.79\pm 0.06$, and the violation of a Bell's inequality with $S=2.21\pm 0.08$. The above results represent an essential step towards scalable quantum computation with ultracold atoms in optical lattices.

12 pages, 10 figures

References in corpus (13)

• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Quantum Computing
• Single-Spin Addressing in an Atomic Mott Insulator
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• Controlled exchange interaction between pairs of neutral atoms in an optical lattice
• Multi-Component Quantum Gases in Spin-Dependent Hexagonal Lattices
• Two Fermions in a double well: Exploring a fundamental building block of the Hubbard model
• Atomic quantum simulator for lattice gauge theories and ring exchange models
• Spatially Resolved Detection of a Spin-Entanglement Wave in a Bose-Hubbard Chain
• Controlling and Detecting Spin Correlations of Ultracold Atoms in Optical lattices
• Minimum instances of topological matter in an optical plaquette
• Creation of resilient entangled states and a resource for measurement-based quantum computation with optical superlattices
• Preparation of Decoherence Free Cluster States with Optical Superlattices

Cited by in corpus (45)

• Entanglement Certification $-$ From Theory to Experiment
• Spatially distributed multipartite entanglement enables Einstein-Podolsky-Rosen steering of atomic clouds
• Cooling and entangling ultracold atoms in optical lattices
• Observation of Four-body Ring-exchange Interactions and Anyonic Fractional Statistics
• Floquet Higher-Order Topological Insulators with Anomalous Dynamical Polarization
• Experimental Characterization of Two-Particle Entanglement through Position and Momentum Correlations
• Entanglement-enhanced quantum metrology: from standard quantum limit to Heisenberg limit
• Observation of Quantum Criticality and Luttinger Liquid in One-dimensional Bose Gases
• Spin pumping and measurement of spin currents in optical superlattices
• Nonreciprocal enhancement of remote entanglement between nonidentical mechanical oscillators
• Nano-Scale `Dark State' Optical Potentials for Cold Atoms
• Spin-dependent Optical Superlattice
• Macroscopic Quantum Superpositions via Dynamics in a Wide Double-Well Potential
• Probing quantum correlations in many-body systems: a review of scalable methods
• Realization of a Bosonic Antiferromagnet
• Witnessing Entanglement and Quantum Correlations in Condensed Matter: A Review
• Functional building blocks for scalable multipartite entanglement in optical lattices
• Preparation of a Heteronuclear Two-atom System in the 3D Motional Ground State in an Optical Tweezer
• Characterizing twin-particle entanglement in double-well potentials
• Rabi Spectroscopy and Sensitivity of a Floquet Engineered Optical Lattice Clock
• Bell inequality, Einstein-Podolsky-Rosen steering and quantum metrology with spinor Bose-Einstein condensates
• Collective excitations of dipolar gases based on local tunneling in superlattices
• Tripartite quantum entanglement with squeezed optomechanics
• Observation of counterflow superfluidity in a two-component Mott insulator
• Optical superlattice for engineering Hubbard couplings in quantum simulation
• Topological magnon insulator and quantized pumps from strongly-interacting bosons in optical superlattices
• Three-body interaction effects on the ground state of one-dimensional anyons
• Multi-frequency optical lattice for dynamic lattice-geometry control
• Qudit hypergraph states and their properties
• A scheme to create and verify scalable entanglement in optical lattice
• Sample-efficient estimation of entanglement entropy through supervised learning
• Quantum metrology with precision reaching beyond-$1/N$ scaling through $N$-probe entanglement generating interactions
• Splitting and connecting singlets in atomic quantum circuits
• Keyless Semi-Quantum Point-to-point Communication Protocol with Low Resource Requirements
• Non-equilibrium quantum phase transition in a spinor quantum gas in a lattice coupled to a membrane
• Quantum Non-Demolition Measurement on the Spin Precession of Laser-Trapped ${}^{171}$Yb Atoms
• Correlations generated from high-temperature states: nonequilibrium dynamics in the Fermi-Hubbard model
• Distilling momentum-space entanglement in Luttinger liquids at finite temperature
• Trends of information backflow in disordered spin chains
• Interaction effects of pseudospin-based magnetic monopoles and kinks in a doped dipolar superlattice gas
• Tunnel-coupled optical microtraps for ultracold atoms
• Microscopic Study on Superexchange Dynamics of Composite Spin-1 Bosons
• Generating scalable entanglement of ultracold bosons in superlattices through resonant shaking
• Gaussian state entanglement witnessing through lossy compression
• Preparation of quasi-two-dimensional Bose mixture of ultracold ${}^{23}$Na and ${}^{87}$Rb atoms