Co-Processors for Quantum Devices
Abstract
Quantum devices, from simple fixed-function tools to the ultimate goal of a universal quantum computer, will require high quality, frequent repetition of a small set of core operations, such as the preparation of entangled states. These tasks are perfectly suited to realisation by a co-processor or supplementary instruction set, as is common practice in modern CPUs. In this paper, we present two quintessentially quantum co-processor functions: production of a GHZ state, and implementation of optimal universal (asymmetric) quantum cloning. Both are based on the evolution of a fixed Hamiltonian. We introduce a new technique for deriving the parameters of these Hamiltonians based on the numerical integration of Toda-like flows.
Cite
@article{arxiv.1710.04932,
title = {Co-Processors for Quantum Devices},
author = {Alastair Kay},
journal= {arXiv preprint arXiv:1710.04932},
year = {2018}
}
Comments
11 pages, 5 figures v2: added neat new observation that the Ising evolution can be converted into creating a controlled-not gate, controlled off parity of a pair of qubits, targeting every qubit in the system v3: extended version