Always on non-nearest-neighbour coupling in scalable quantum computing
Yong Hu, Zheng-Wei Zhou, Guang‐Can Guo · New Journal of Physics · 2007
In many previous 'always-on' quantum computing (QC) schemes the non-nearest-neighbour couplings are often omitted because of their weak strength compared with the nearest-neighbour coupling. In this paper, we consider the problem of residual long-range interaction. We propose a QC scheme in which by the method of generalized 'barrier spin' encoding, the influence of the long-range coupling can be significantly suppressed. The universal quantum gates could be deterministically established. We also study the application of this scheme in a Josephson junction system.