## Quantum Computer Science: An IntroductionIn the 1990's it was realized that quantum physics has some spectacular applications in computer science. This book is a concise introduction to quantum computation, developing the basic elements of this new branch of computational theory without assuming any background in physics. It begins with an introduction to the quantum theory from a computer-science perspective. It illustrates the quantum-computational approach with several elementary examples of quantum speed-up, before moving to the major applications: Shor's factoring algorithm, Grover's search algorithm, and quantum error correction. The book is intended primarily for computer scientists who know nothing about quantum theory, but will also be of interest to physicists who want to learn the theory of quantum computation, and philosophers of science interested in quantum foundational issues. It evolved during six years of teaching the subject to undergraduates and graduate students in computer science, mathematics, engineering, and physics, at Cornell University. |

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please tell me the name of computers which uses quantum technology.........

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1Qbit measurement gate 1Qbit unitary 2Qbit gates 5Qbit code action additional Qbits algorithm Alice and Bob Alice’s amplitudes ancilla ancillary Qbits anticommutes Appendix applies a Hadamard associated bits Bob’s Born rule Cbit circuit diagram circuit in Figure classical computer cNOT gates codeword complex numbers computational basis computationalbasis constructed control Qbit controlledU corrupted described Deutsch’s problem eigenstates eigenvalues flips gates acting Grover’s Hadamard gates Hadamard transformation identity initial inner product input register integer interactions interchanges inthe matrix modulo modulo2 multiple nQbit ofthe onthe operators orthogonal orthonormal output register periodfinding phase factor physicists possible probability procedure quantum computation quantum error correction quantum Fourier transform quantum mechanics random randomly represented result rotation Shor’s single Qbit subroutine subspace superposition target Qbit teleportation tensor product theinput thestate threedimensional Toffoli gates tothe twodimensional unit vectors unitary gates unitary transformation wires