QOperAv, a Code Generator for Generating Quantum Circuits for Evaluating Certain Quantum Operator Averages

摘要

This paper introduces QOperAv v1.5, a Java application available for free.(Source code included in the distribution.) QOperAv is a "code generator" forgenerating quantum circuits. The quantum circuits generated by QOperAv can beused to evaluate with polynomial efficiency the average of $f(A)$ for somesimple (that is, computable with polynomial efficiency) function $f$ and aHermitian operator $A$, provided that we know how to compile $\exp(iA)$ withpolynomial efficiency. QOperAv implements an algorithm described in earlierpapers, that combines various standard techniques such as quantum phaseestimation and quantum multiplexors.