Spin Star as Switch for Quantum Networks
Abstract
Quantum state transfer is an important task in quantum information processing. It is known that one can engineer the couplings of a one-dimensional spin chain to achieve the goal of perfect state transfer. To leverage the value of these spin chains, a spin star is potentially useful for connecting different parts of a quantum network. In this work, we extend the spin-chain engineering problem to the problems with a topology of a star network. We show that a permanently coupled spin star can function as a network switch for transferring quantum states selectively from one node to another by varying the local potentials only. Together with one-dimensional chains, this result allows applications of quantum state transfer be applied to more general quantum networks.
Cite
@article{arxiv.0705.1560,
title = {Spin Star as Switch for Quantum Networks},
author = {Man-Hong Yung},
journal= {arXiv preprint arXiv:0705.1560},
year = {2016}
}