Implementation of π-periodic Josephson Elements for Topologically Protected Charge-Parity Qubits
ORAL
Abstract
Superconducting qubits with topological protection against local noise hold the promise of significantly enhanced coherence times and higher gate fidelities than is possible with conventional qubits. We are developing one such protected design — the hybrid charge-parity qubit that combines arrays of high kinetic inductance nanowires and conventional Josephson junctions and involves the individual flux control in each plaquette. For appropriate values of the Josephson energy and charging energy of the junctions and the inductive energy of the nanowires, the arrays can be tuned between a periodicity of 2π and π by varying the external magnetic flux through the array. We describe the fabrication of these arrays and experiments to characterize the periodicity with phase by incorporating the array into an rf SQUID.
*Supported by the U.S. Government under Grant W911NF-18-1-0106
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Presenters
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Yebin Liu
- Physics, Syracuse University
- Syracuse University