Lectures on Quantum Optics and Quantum Information

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Quantum Information Science Over the last 20 years, QIS has developed driven by the prospect to exploit capabilities from the quantum realm to accomplish tasks difficult or even impossible with traditional methods of information processing. Quantum communication, the art of transferring a quantum state from one place to another. It led for instance to the demonstration of quantum cryptography, an absolutely secure way to transmit information, and even to commercially available quantum key distribution systems and a network deployed in a metropolitan area. Quantum computation, where bits are replaced by qubits. It detains the promise of computing power beyond the capabilities of any classical computer. For instance, P. Shor showed that a quantum computer can factorize a large number efficiently, i.e. in a polynomial time, while it is an exponentially difficult problem for classical algorithms. Beyond its fundamental interest for understanding quantum complexity, it is of practical importance as the difficulty of factoring numbers is the basis of encryption systems, such as the RSA scheme. A third direction is quantum metrology and enhanced sensing. M.A. Nielsen, L. Chuang, Quantum computation and Quantum Information, Cambridge Univ. Press S.M. Barnett, Quantum Information, Oxford Univ. Press H.A. Bachor,T.C. Ralph, A guide to experiments in quantum optics, Wiley-VCH
Content of the lectures Lecture 1 Introduction to quantum noise, squeezed light and entanglement generation Quantization of light, Continuous-variable, Homodyne detection, Gaussian states, Optical parametric oscillators, Entanglement, Teleportation Lecture 2 Quantum state engineering Conditional preparation, Non-Gaussian states, Schrödinger cat states, Hybrid approaches, Quantum detectors, POVM and detector tomography Lecture 3 Optical quantum memories. Quantum repeaters, atomic ensembles, DLCZ, EIT, Photon-echo, Matter-Matter entanglement
Page 1: Lectures on Quantu
Page 5 and 6: Lecture 1 • Light quantization, d
Page 7 and 8: Quantization of the Electromagnetic
Page 9 and 10: Two Possible Descriptions Quantizat
Page 11 and 12: Quantization of the electromagnetic
Page 13 and 14: Quantum Continuous-Variables Quanti
Page 15 and 16: Q A Q Quantum Continuous-Variables
Page 17 and 18: Quantum Continuous-Variables Quanti
Page 19 and 20: Measuring Optical Continuous-Variab
Page 21 and 22: Measuring Optical Continuous-Variab
Page 23 and 24: The Wigner Function For continuous-
Page 25 and 26: The Wigner Function: Function: Nega
Page 27 and 28: Interlude: CV for Atomic Ensembles
Page 29 and 30: Lecture 1 • Light quantization, d
Page 31 and 32: How to Generate Squeezed Light ? Sq
Page 33 and 34: CW Parametric Amplification in a Ca
Page 35 and 36: CW Parametric Amplification in a Ca
Page 37 and 38: Effect of Losses on Squeezed Light
Page 39 and 40: Effect of Losses on Squeezed Light
Page 41 and 42: Classical Correlations of Light Bea
Page 43 and 44: « One Quadrature » Criteria Two b
Page 45 and 46: Quantum Intensity Correlations With
Page 47 and 48: « Two Quadratures » Criteria A do
Page 49 and 50: « Two Quadratures » Criteria A do
Page 51 and 52: How to Generate CV Entanglement ? E
Page 53 and 54:
How to Generate CV Entanglement ? W
Page 55 and 56:
Quantum Teleportation 1- Measuremen
Page 57 and 58:
Multimode Entanglement : Cluster St
Page 59 and 60:
A last Level of Correlations : Non-
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Lectures on Quantum Optics and Quantum Information

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