Introduction to Optical Quantum Information Processing 1. Quantum Entanglement in A Photon-Pair

Introduction to Quantum Information Processing

2 Quantum Information 5 2.1 The Quantum Bit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 2.2 Processing One Qubit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 2.3 Two Quantum Bits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.4 Processing Two Qubits . . . . . . . . . . . . . . . . . . . . . . . ...

Engineering an ideal indistinguishable photon-pair source for optical quantum information processing

Engineering an ideal indistinguishable photon-pair source for optical quantum information processing Radhika Rangarajan a , Luis Edgar Vicent b , Alfred B. U’Ren b & Paul G. Kwiat a a Department of Physics , University of Illinois at Urbana-Champaign , 1110 W Green St., Urbana, IL 61801, USA b Instituto de Ciencias Nucleares, Universidad Nacional Autónoma de México , Apartado Postal 70–543, 045...

GEOMETRY OF QUANTUM STATES An Introduction to Quantum Entanglement GEOMETRY OF QUANTUM STATES An Introduction to Quantum Entanglement

Quantum Algorithms: Entanglement Enhanced Information Processing

We discuss the fundamental role of entanglement as the essential nonclassical feature providing the computational speedup in the known quantum algorithms. We review the construction of the Fourier transform on an Abelian group and the principles underlying the fast Fourier transform algorithm. We describe the implementation of the FFT algorithm for the group of integers modulo 2 in the quantum ...

NMR quantum information processing and entanglement

In this essay we discuss the issue of quantum information and recent nuclear magnetic resonance (NMR) experiments. We explain why these experiments should be regarded as quantum information processing (QIP) despite the fact that, in present liquid state NMR experiments, no entanglement is found. We comment on how these experiments contribute to the future of QIP and include a brief discussion o...