Universal Quantum Circuits
Date
2008-02-15
DOI
Authors
Bera, Debajyoti
Fenner, Stephen
Green, Frederic
Homer, Steve
Version
OA Version
Citation
Abstract
We define and construct efficient depth universal and almost size universal quantum circuits. Such circuits can be viewed as general purpose simulators for central classes of quantum circuits and can be used to capture the computational power of the circuit class being simulated. For depth we construct universal circuits whose depth is the same order as the circuits being simulated. For size, there is a log factor blow-up in the universal circuits constructed here. We prove that this construction is nearly optimal. Our results apply to a number of well-studied quantum circuit classes.