Protomon: A Multimode Qubit in the Fluxonium Molecule
Protomon: A Multimode Qubit in the Fluxonium Molecule
Qubits that are intrinsically insensitive to depolarization and dephasing errors promise to significantly reduce the overhead of fault-tolerant quantum computing. At their optimal operating points, the logical states of these qubits exhibit both exponentially suppressed matrix elements and sweet spots in energy dispersion, rendering the qubits immune to depolarization and …