Single-qubit remote manipulation by magnetic solitons

TL;DR

This paper demonstrates how magnetic solitons can remotely manipulate qubits in solid-state devices, enabling nonlocal quantum control without direct magnetic field application.

Contribution

It introduces a method to generate and utilize magnetic solitons in Heisenberg spin chains for remote qubit manipulation, a novel approach in quantum control.

Findings

Simulated realistic soliton generation in spin chains.

Soliton passage induces nontrivial qubit operations.

Effective control persists under moderate thermal noise.

Abstract

Magnetic solitons can constitute a means for manipulating qubits from a distance. This would overcome the necessity of directly applying selective magnetic fields, which is unfeasible in the case of a matrix of qubits embedded in a solid-state quantum device. If the latter contained one-dimensional Heisenberg spin chains coupled to each qubit, one can originate a soliton in a selected chain by applying a time-dependent field at one end of it, far from the qubits. The generation of realistic solitons has been simulated. When a suitable soliton passes by, the coupled qubit undergoes nontrivial operations, even in the presence of moderate thermal noise.