Transporting quantum information is an important prerequisite for quantum computers. We study how this can be done in Heisenberg-coupled spin networks using adiabatic control over the coupling strengths. We find that qudits can be transferred and entangled pairs can be created between distant sites of bipartite graphs with a certain balance between the maximum spin of both parts, extending previous results that were limited to linear chains. The transfer fidelity in a small star-shaped network is numerically analysed, and possible experimental implementations are discussed.

Antiferromagnets, Heisenberg spin chains, Quantum information
SciPost Foundation
SciPost Physics
Algorithms and Complexity

Groenland, K.L. (2019). Adiabatic state distribution using anti-ferromagnetic spin systems. SciPost Physics, 6(011). doi:10.21468/SciPostPhys.6.1.011