Quantum Computing with Metastable Strontium Qubits

IQOQI Quantum Seminar

Atom arrays have shaped the research frontier in quantum simulation, quantum metrology and quantum computation in recent years. In this talk, I will present our approach to realizing an atom array platform based on directly loaded large-scale optical lattices. Utilizing a specialized, highly anisotropic lattice geometry, we directly load thousands of individually addressable strontium atoms from the magneto-optical trap. We demonstrate high-fidelity and low-loss imaging and show how iterative assembly as well as continuous operation of atom arrays is possible in our architecture. For applications in quantum computing and quantum simulation, we realize a qubit in the meta-stable fine-structure states of strontium. We demonstrate long coherence times and high-fidelity manipulation of this qubit, as well as fast initialization via coherent three-photon coupling from the ground state. Our work showcases the scalability of atom arrays trapped in optical lattices and establishes the fine-structure qubit in strontium as a promising qubit platform for neutral-atom quantum computers.

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