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
dx.doi.org/10.21468/SciPostPhys.6.1.011
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