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Simulation of Quantum Computation with Wolfram Mathematica Package ”QuantumCircuit” Alexander N. Prokopenya Department of Applied Informatics, Warsaw University of Life Sciences, Nowoursynowska str. 159, 02-776 Warsaw, Poland E-mail: alexander [email protected] Quantum computation and quantum information is a rapidly developing research area of modern science and technology. Quantum computers are to be able to perform certain computational tasks much more efficiently than classical computers. At the same time a realistic quantum computer is still not available and the majority of studies in this field are theoretical ones. This stimulates development of classical simulators of quantum computation which help to understand better existing quantum algorithms and can be used for searching and testing new effective algorithms. The purpose of this talk is to present the Wolfram Mathematica package ”QuantumCircuit” for simulation of quantum computation based on the circuit model (see [1, 2, 3, 4]). The package provides a user-friendly interface to specify a quantum circuit, to draw it, and to construct the corresponding unitary matrix for quantum computation defined by the circuit. Using this matrix, one can find the final state of the quantum memory register by its given initial state and to check the operation of the algorithm determined by the quantum circuit. As an application of the package ”QuantumCircuit” we demonstrate simulation of quantum circuits implementing several the best known quantum algorithms [5]. Among them we consider the Grover search algorithm and the Shor algorithm for integer factorization. In addition, we analyze some examples of the circuits used for quantum error correction. References [1] V. P. Gerdt, R. Kragler, A. N. Prokopenya. A Mathematica program for constructing quantum circuits and computing their unitary matrices. Physics of Particles and Nuclei, Letters, Vol. 6, No. 7 (2009) 526–529. [2] V. P. Gerdt, A. N. Prokopenya. Some Algorithms for Calculating Unitary Matrices for Quantum Circuits. Programming and Computer Software, 36 (2010) 111–116. [3] V. P. Gerdt, A. N. Prokopenya. The circuit model of quantum computation and its simulation with Mathematica. In: ”Mathematical Modeling and Computational Science”, G. Adam, J. Bua, M. Hnati (Eds.), LNCS, vol. 7125, Springer-Verlag, Berlin Heidelberg (2012) 43–55. [4] V. P. Gerdt, A. N. Prokopenya. Simulation of quantum error correction with Mathematica. In: ”Computer Algebra in Scientific Computing”, V.P. Gerdt, W. Koepf, E.W. Mayr, E.V. Vorozhtsov (Eds.), LNCS, vol. 8136, Springer-Verlag, Berlin Heidelberg (2013) 116–129. [5] M. Nielsen, I. Chuang Quantum Computation and Quantum Information, Cambridge University Press (2000). 1