Cluster-state quantum computing enhanced by high-fidelity generalized measurements
Quantum Physics
2009-12-15 v1
Abstract
We introduce and implement a technique to extend the quantum computational power of cluster states by replacing some projective measurements with generalized quantum measurements (POVMs). As an experimental demonstration we fully realize an arbitrary three-qubit cluster computation by implementing a tunable linear-optical POVM, as well as fast active feedforward, on a two-qubit photonic cluster state. Over 206 diferent computations, the average output fidelity is 0.9832 +/- 0.0002; furthermore the error contribution from our POVM device and feedforward is only of order 10e-3, less than some recent thresholds for fault-tolerant cluster computing.
Cite
@article{arxiv.0909.2843,
title = {Cluster-state quantum computing enhanced by high-fidelity generalized measurements},
author = {Devon N. Biggerstaff and Terry Rudolph and Rainer Kaltenbaek and Deny Hamel and Gregor Weihs and Kevin J. Resch},
journal= {arXiv preprint arXiv:0909.2843},
year = {2009}
}
Comments
4 pages, 4 figures