  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.
