A full-vortex flux qubit for charged particle optics

Abstract

We introduce a design of a superconducting flux qubit capable of holding a full magnetic flux quantum ${\varphi }_0$, which arguably is an essential property for applications in charged particle optics. The qubit comprises a row of $N$ constituent qubits, which hold a fractional magnetic flux quantum ${\varphi }_0/N$. Insights from physics of the transverse-field Ising chain reveal that properly designed interaction between these constituent qubits enables their collective behavior while also maintaining the overall quantumness.

15 pages, 4 figures, 1 table, version prior to proofreading before publication

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