Non-Hermitian description of a superconducting phase qubit measurement

TL;DR

This paper introduces a non-Hermitian Hamiltonian framework to model the measurement process of a superconducting phase qubit, providing analytical expressions that align with experimental observations.

Contribution

It presents a novel non-Hermitian approach to describe qubit measurement dynamics, offering analytical tools for understanding superconducting phase qubit measurements.

Findings

Derived simple analytical expressions for measurement dynamics.

Validated the model against experimental data.

Enhanced understanding of tunneling-based qubit measurement processes.

Abstract

We present an approach based on a non-Hermitian Hamiltonian to describe the process of measurement by tunneling of a phase qubit state. We derive simple analytical expressions which describe the dynamics of measurement, and compare our results with those experimentally available.