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Highly parallel coherent qubit transport and entanglement in a quantum information architecture
Bluvstein, Dolev - Harvard University
Presentation on Thursday, Sept. 30, 2021, noon
Location: Virtual Seminars over Zoom Until Further Notice
The ability to engineer highly parallel, programmable operations between desired qubits within a quantum processor is central for building scalable quantum information systems. In most state-of-the-art approaches qubits interact locally, constrained by the connectivity associated with the fixed geometry of the layout. Here, we demonstrate a dynamically reconfigurable quantum architecture which allows for entangled qubits to be coherently transported in a highly parallel manner across two spatial dimensions, in-between layers of single- and two-qubit operations. Our approach makes use of neutral atom arrays shuttled by optical tweezers: hyperfine states are used for quantum information storage and transport, while excitation into Rydberg states is used for entanglement generation. This architecture is used to demonstrate programmable generation of entangled graph states such as cluster states and various topological error correcting code states. Finally, we show these tools allow merging many-body Hamiltonian evolution with digital quantum gates; as an example application, we measure entanglement entropy following many-body dynamics, observing in particular non-thermal entanglement behavior associated with quantum many-body scars. Realizing a long-standing goal in quantum science and engineering, these results pave a way towards scalable quantum processing and new applications in quantum information.