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Equivalence Checking of Quantum Finite-State Machines

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arxiv 1901.02173 v3 pith:4ST3YIPD submitted 2019-01-08 cs.FL quant-ph

Equivalence Checking of Quantum Finite-State Machines

classification cs.FL quant-ph
keywords checkingequivalencemachinesquantumminimisationalgorithmsapplicationcircuits
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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In this paper, we introduce the model of quantum Mealy machines and study the equivalence checking and minimisation problems of them. Two efficient algorithms are developed for checking equivalence of two states in the same machine and for checking equivalence of two machines. As an application, they are used in equivalence checking of quantum circuits. Moreover, the minimisation problem is proved to be in $\textbf{PSPACE}$.

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