Functional building blocks for scalable multipartite entanglement in optical lattices

Abstract

Featuring excellent coherence and operated parallelly, ultracold atoms in optical lattices form a competitive candidate for quantum computation. For this, a massive number of parallel entangled atom pairs have been realized in superlattices. However, the more formidable challenge is to scale-up and detect multipartite entanglement due to the lack of manipulations over local atomic spins in retro-reflected bichromatic superlattices. Here we developed a new architecture based on a cross-angle spin-dependent superlattice for implementing layers of quantum gates over moderately-separated atoms incorporated with a quantum gas microscope for single-atom manipulation. We created and verified functional building blocks for scalable multipartite entanglement by connecting Bell pairs to one-dimensional 10-atom chains and two-dimensional plaquettes of $2\times 4$ atoms. This offers a new platform towards scalable quantum computation and simulation.

References in corpus (16)

• Many-Body Physics with Ultracold Gases
• Quantum phase transition from a superfluid to a Mott insulator in a gas of ultracold atoms
• Single-Atom Resolved Fluorescence Imaging of an Atomic Mott Insulator
• Single-Spin Addressing in an Atomic Mott Insulator
• Time-resolved Observation and Control of Superexchange Interactions with Ultracold Atoms in Optical Lattices
• Demonstration of multi-qubit entanglement and algorithms on a programmable neutral atom quantum computer
• Strongly Correlated Quantum Walks in Optical Lattices
• Entanglement Detection in the Stabilizer Formalism
• Controlling and Detecting Spin Correlations of Ultracold Atoms in Optical lattices
• Metrological Detection of Multipartite Entanglement from Young Diagrams
• Manipulation of Single Neutral Atoms in Optical Lattices
• Spin-dependent Optical Superlattice
• Tuning the Topological $\theta$-Angle in Cold-Atom Quantum Simulators of Gauge Theories
• Tunable Confinement-Deconfinement Transition in an Ultracold Atom Quantum Simulator
• Creation of resilient entangled states and a resource for measurement-based quantum computation with optical superlattices
• A scheme to create and verify scalable entanglement in optical lattice

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• Observation of counterflow superfluidity in a two-component Mott insulator
• Optical superlattice for engineering Hubbard couplings in quantum simulation
• State-dependent potentials for the ${}^1{\text{S}}_0$ and ${}^3{\text{P}}_0$ clock states of neutral ytterbium atoms
• Variational quantum state preparation for quantum-enhanced metrology in noisy systems
• Quantifying Quantum Computational Advantage on a Processor of Ultracold Atoms
• Hamiltonian and Liouvillian learning in weakly-dissipative quantum many-body systems
• Splitting and connecting singlets in atomic quantum circuits
• Simulating Chemistry with Fermionic Optical Superlattices
• Efficient fidelity estimation: Alternative derivation and related applications
• Microscopic Study on Superexchange Dynamics of Composite Spin-1 Bosons
• Partial confinement in a quantum-link simulator
• Protected quantum gates using qubit doublons in dynamical optical lattices
• Fast collisional $\sqrt{\mathrm{SWAP}}$ gate for fermionic atoms in an optical superlattice