Decoherence of Phase Qubit using High-Tc Superconductor

TL;DR

This paper explores the use of high-temperature superconductor Josephson junctions in phase qubits, focusing on how quasiparticle dissipation and zero energy bound states impact quantum tunneling and measurement processes.

Contribution

It introduces a novel approach to constructing phase qubits with high-Tc d-wave superconductors and analyzes their decoherence mechanisms.

Findings

Quasiparticle dissipation affects quantum tunneling in d-wave phase qubits.

Zero energy bound states influence measurement fidelity.

High-Tc superconductor junctions offer potential advantages for qubit design.

Abstract

We discuss how to make use of high-Tc d-wave Josephson junctions in the construction of a phase qubit. We especially focus on the effect of the quasiparticle dissipation and the zero energy bound state on the macroscopic quantum tunneling which corresponds to the final measurement process of the d-wave phase qubit.