Using the J 1 – J 2 quantum spin chain as an adiabatic quantum data bus
Nicholas Chancellor, Stephan Haas · New Journal of Physics · 2012
This paper investigates numerically a phenomenon which can be used to transport a single q-bit down a J 1 – J 2 Heisenberg spin chain using a quantum adiabatic process. The motivation for investigating such processes comes from the idea that this method of transport could potentially be used as a means of sending data to various parts of a quantum computer made of artificial spins, and that this method could take advantage of the easily prepared ground state at the so-called Majumdar–Ghosh point. We examine several annealing protocols for this process and find similar results for all of them. The annealing process works well up to a critical frustration threshold. There is also a brief section examining what other models this protocol could be used for, examining its use in the XXZ and XYZ models.