Qudits employing nonlinear dielectrics

Abstract

The disclosed qudits interchange the roles of linear and nonlinear in the nonlinear LC resonators formed by existing superconducting qudits. The disclosed qudits include a nonlinear capacitor (e.g., a material that forms charge density waves, a material that forms spin density waves, a ferroelectric material, an incipient ferroelectric material, or a quantum paraelectric material) coupled to a linear or nearly linear inductance (e.g., a high temperature superconductive coil, an array of Josephson junctions in series, etc.). The disclosed qudits can operate at significantly higher temperatures than existing quantum computing technologies due to reduced quasiparticle poisoning and collective quantum behavior that enhance thermal robustness. The disclosed qudits are also easier to manufacture uniformly at scale than existing qubits. Finally, the disclosed qudits are also compatible with many of the gating, coupling, readout, and pulse-sequence methodologies that have already been developed for existing superconducting qubits.

Dependencies are inferred from the claim text.