The decoherence of coupled spin qubits system

TL;DR

This paper investigates how coupled spin qubits decohere due to interactions with a spin chain and Gaussian noise, providing insights into their quantum coherence dynamics.

Contribution

It introduces a combined analytical and numerical approach to study decoherence in coupled spin qubits with specific interactions and noise models.

Findings

Decoherence behavior depends on the spin chain interaction strength.

Numerical simulations reveal the time evolution of the density matrix under Gaussian noise.

Influence functional method effectively captures decoherence mechanisms.

Abstract

In this report, we examine the decoherence of a spin qubits system coupled to counted spin chain with a $1/r^2$ interaction by using influence functional. We also examine the time evolution of density matrix numerically when environment is Gaussian noise.