Quasiparticle Dissipation in d-wave Superconductor Phase Qubit

TL;DR

This paper explores the use of d-wave Josephson junctions in phase qubits, focusing on how quasiparticle dissipation affects quantum tunneling and measurement in high-temperature superconductor-based qubits.

Contribution

It introduces a design for d-wave phase qubits and analyzes the impact of quasiparticle dissipation on their quantum tunneling behavior.

Findings

Quasiparticle dissipation influences macroscopic quantum tunneling.

D-wave Josephson junctions can be used for phase qubits.

Implications for high-Tc superconductor qubit design.

Abstract

Recent phase sensitive experiments on high Tc superconductors, e.g., YBa_2Cu_3O_7 single crystals, have established the d-wave nature of the cuprate materials. Here we discuss how to make use of d-wave Josephson junctions in the construction of a phase qubit. We especially focus on the effect of quasiparticle dissipation on the macroscopic quantum tunneling which corresponds to the measurement process for the d-wave phase qubit.