Decoherence of a solid-state qubit by different noise correlation spectra

TL;DR

This paper investigates how different environmental noise spectra, including thermal Ohmic and 1/f noise, cause decoherence in solid-state qubits, providing insights for improving quantum information processing.

Contribution

It analyzes the effects of longitudinal and transversal noise on superconducting qubits using a master equation approach, highlighting how various noise spectra influence decoherence.

Findings

Thermal Ohmic environments induce specific decoherence patterns.

Low-frequency 1/f noise significantly affects qubit coherence.

Results inform experimental design for superconducting qubits.

Abstract

The interaction between solid-state qubits and their environmental degrees of freedom produces non-unitary effects like decoherence and dissipation. Uncontrolled decoherence is one of the main obstacles that must be overcome in quantum information processing. We study the dynamically decay of coherences in a solid-state qubit by means of the use of a master equation. We analyse the effects induced by thermal Ohmic environments and low-frequency 1/f noise. We focus on the effect of longitudinal and transversal noise on the superconducting qubit's dynamics. Our results can be used to design experimental future setups when manipulating superconducting qubits.