János Bergou is a Professor at Hunter College and the Graduate Center of the City University of New York. He received his Diploma (MS) and Ph.D. from the Eötvös University in Budapest, and a Doctor of Science degree from the Hungarian Academy of Sciences, all in physics. He started his career at the Central Research Institute for Physics in Budapest, Hungary. He was a Humboldt Fellow at the Max Planck Institute for Quantum Optics in Garching bei München, Germany, and a visiting professor at the Institute for Modern Optics at the University of New Mexico before settling in New York. He is a fellow of both the Optical Society of America and the American Physical Society. He served as Divisional Associate Editor for Physical Review Letters and was a Member of the Editorial Board of Physical Review A. He has worked primarily in the areas of quantum optics and quantum information.Mark Hillery is a Professor at Hunter College and the Graduate Center of the City University of NewYork. He received a BS degree from MIT and a Ph.D. from the University of California at Berkeley, both in physics. He did postdoctoral work at the Institute for Modern Optics at the University of New Mexico and at the Max Planck Institute for Quantum Optics in Garching bei München, Germany. He is a fellow  of both the Optical Society of America and the American Physical Society and was an Associate Editor of Physical Review A  for 15 years. He has worked primarily in the areas of quantum optics and quantum information.Mark Saffman is a Professor in the Department of Physics at the University of Wisconsin-Madison. He received his B.Sc. with honors in Applied Physics from the California Institute of Technology and his PhD in Physics from the University of Colorado at Boulder. Mark worked in industry and at the Risø National Laboratory in Denmark before joining the faculty at UWM in 1999.   He is also Chief Scientist for Quantum Information at ColdQuanta, Inc.and an Associate Editor of Physical Review A. He has been recognized with an Alfred P. Sloan fellowship and is a fellow of the American Physical Society and the Optical Society of America. His primary research interests lie at the intersection of atomic and optical physics and quantum information.

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• Preface.- Introduction.- The Density Matrix.- Entanglement.- Generalized Quantum Dynamics.- Quantum Measurement Theory.- Quantum Cryptography.- Quantum Algorithms.- Quantum Machines.- Decoherence and Quantum Error Correction.- The Stabilizer Formalism.- Information Theory.- Physical Requirements for Quantum Computing.- Qubits Coupled to the Environment.- Atomic Qubits.- Photonic Qubits.- Solid State Qubits.- Comparison and Outlook.- Index.

János Bergou is a Professor at Hunter College and the Graduate Center of the City University of New York. He received his Diploma (MS) and Ph.D. from the Eötvös University in Budapest, and a Doctor of Science degree from the Hungarian Academy of Sciences, all in physics. He started his career at the Central Research Institute for Physics in Budapest, Hungary. He was a Humboldt Fellow at the Max Planck Institute for Quantum Optics in Garching bei München, Germany, and a visiting professor at the Institute for Modern Optics at the University of New Mexico before settling in New York. He is a fellow of both the Optical Society of America and the American Physical Society. He served as Divisional Associate Editor for Physical Review Letters and was a Member of the Editorial Board of Physical Review A. He has worked primarily in the areas of quantum optics and quantum information.Mark Hillery is a Professor at Hunter College and the Graduate Center of the City University of NewYork. He received a BS degree from MIT and a Ph.D. from the University of California at Berkeley, both in physics. He did postdoctoral work at the Institute for Modern Optics at the University of New Mexico and at the Max Planck Institute for Quantum Optics in Garching bei München, Germany. He is a fellow  of both the Optical Society of America and the American Physical Society and was an Associate Editor of Physical Review A  for 15 years. He has worked primarily in the areas of quantum optics and quantum information.Mark Saffman is a Professor in the Department of Physics at the University of Wisconsin-Madison. He received his B.Sc. with honors in Applied Physics from the California Institute of Technology and his PhD in Physics from the University of Colorado at Boulder. Mark worked in industry and at the Risø National Laboratory in Denmark before joining the faculty at UWM in 1999.   He is also Chief Scientist for Quantum Information at ColdQuanta, Inc.and an Associate Editor of Physical Review A. He has been recognized with an Alfred P. Sloan fellowship and is a fellow of the American Physical Society and the Optical Society of America. His primary research interests lie at the intersection of atomic and optical physics and quantum information.

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• Preface.- Introduction.- The Density Matrix.- Entanglement.- Generalized Quantum Dynamics.- Quantum Measurement Theory.- Quantum Cryptography.- Quantum Algorithms.- Quantum Machines.- Decoherence and Quantum Error Correction.- The Stabilizer Formalism.- Information Theory.- Physical Requirements for Quantum Computing.- Qubits Coupled to the Environment.- Atomic Qubits.- Photonic Qubits.- Solid State Qubits.- Comparison and Outlook.- Index.