Cluster State Generation with Spin-Orbit Coupled Fermionic Atoms in Optical Lattices

Abstract

Measurement-based quantum computation, an alternative paradigm for quantum information processing, uses simple measurements on qubits prepared in cluster states, a class of multiparty entangled states with useful properties. Here we propose and analyze a scheme that takes advantage of the interplay between spin-orbit coupling and superexchange interactions, in the presence of a coherent drive, to deterministically generate macroscopic arrays of cluster states in fermionic alkaline earth atoms trapped in three dimensional (3D) optical lattices. The scheme dynamically generates cluster states without the need of engineered transport, and is robust in the presence of holes, a typical imperfection in cold atom Mott insulators. The protocol is of particular relevance for the new generation of 3D optical lattice clocks with coherence times $>10$ s, two orders of magnitude larger than the cluster state generation time. We propose the use of collective measurements and time-reversal of the Hamiltonian to benchmark the underlying Ising model dynamics and the generated many-body correlations.

6+5 pages, 4+2 figures

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• Physical Realization of Measurement Based Quantum Computation
• Experimental test of high-dimensional quantum contextuality based on contextuality concentration
• High-fidelity imaging of a band insulator in a three-dimensional optical lattice clock
• Quantum computation toolbox for decoherence-free qubits using multi-band alkali atoms
• Coherent control over the high-dimensional space of the nuclear spin of alkaline-earth atoms
• Superfluid transition temperature and fluctuation theory of spin-orbit and Rabi-coupled fermions with tunable interactions
• Entanglement of weighted graphs uncovers transitions in variable-range interacting models