International School on Quantum Information
05 - 09 Aug 2013
General Information
Schedule
Participants

Aims:

  • This is an introductory- to mid-level postgraduate school, focusing on theoretical and experimental aspects of quantum information and quantum computation.
  • It is targeted at MSc. and PhD students wishing to quickly learn the basics of these rapidly developing fields from some of the world's leading experts.
  • Each course will consist of 4:15hrs of lectures in English. There will also be a discussion session between students and lecturers.
  • Following the school there will be an international workshop covering current research and recent advances in these fields. Students are strongly recommended to apply to both events.
  • It is the fourth edition of this biennial event in Paraty ( Click here for the 2011 edition. Click here for the 2009 edition. Click here for the 2007 edition). This fourth edition will have lectures given by: i) Artur Ekert (Centre for Quantum Technologies, Singapore); ii) Atac Imamoglu (ETH Zurich, Switzerland); iii) Ivan Deutsch (Center for Quantum Information and Control, University of New Mexico, USA); iv) Gerardo Adesso ( University of Nottingham, United Kingdom); v) Marcelo P. França Santos (EnLight, Universidade Federal de Minas Gerais, Brazil); vi) Miles Padgett (University of Glasgow, Scotland).

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1 - Artur Ekert - Centre for Quantum Technologies, Singapore





Quo vadis quantum cryptography?




Among those who make their living out of science of secrecy, worrying and paranoia are just a sign of professionalism. Can we protect our secrets against those who wield superior technological powers? Can we trust those who provide us with tools for protection? Finally, can we trust ourselves, our freedom of choice, our free will? Amazingly enough, recent developments in quantum cryptography show that some of these questions can be addressed and discussed in precise and operational terms. More than that, the field has something to offer to the most paranoid ones. All due to the new insights into the nature of randomness and non-local correlations. In my three lectures I will try to provide an overview of this fascinating area of research.

2 - Atac Imamoglu - ETH Zurich, Switzerland





Quantum Photonics




Lectures:
1- Cavity-QED based on photonic nanostructures;
2- Spin-photon entanglement using solid-state emitters;
3- Spin decoherence.

3 - Ivan Deutsch - Center for Quantum Information and Control, University of New Mexico, USA





Quantum Control, Measurement, and Tomography


Lectures:

Lesson 1 - Quantum Control
- Open-loop vs. closed loop control
- Optimal and robust control
- Application in atomic-optical systems

Lesson 2 - Quantum Measurement
- Beyond projective measurements
- POVM, CP-Maps, Kraus Operators and all that
- Continuous measurement

Lesson 3 - Quantum tomography
- Foundations of density operators
- Reconstructing a quantum state
- Tomography via continuous measurement and control


4 - Gerardo Adesso - University of Nottingham, United Kingdom





Quantum information with continuous variables: Gaussian states and beyond


In this set of lectures we will explore the basics of quantum information with continuous variable systems, such as light modes or atomic ensembles. We will introduce the phase space formalism for the description of those systems and focus in particular on Gaussian states, which admit a simple and elegant representation in terms of covariance matrices. We will discuss measures of information and correlations, in particular bipartite and multipartite entanglement, for multimode Gaussian states of harmonic lattices. We will present an overview of the different protocols of continuous variable quantum information. Finally we will give an overview of limitations of Gaussian states and operations, and how to overcome them with non-Gaussian resources.

5 - Marcelo P. França Santos - EnLight, Universidade Federal de Minas Gerais, Brazil





Useful Decoherence


Decoherence is usually seen as a mechanism that destroys the capacity of quantum systems to preserve and process quantum information. However, in some particular cases, decoherence can be used to enhance the quantum possibilities of a given system. In this course, we will explore these ideas in two basic scenarios: in the first case, the existence of natural and/or engineered reservoirs is explored to produce, preserve and manipulate quantum systems into specific quantum states. In the second scenario, the monitoring of the information acquired by these reservoirs through the interaction with given systems serves as the tool for such quantum manipulations.

6 - Miles Padgett - University of Glasgow, Scotland





Orbital Angular Momentum


1) Historical perspective on optical momentum and an experimentalists view as to its origin.
2) Optical angular momentum and the insight it provides to rotational frequency/phase shifts and uncertainty relationships within both classical and quantum regimes.
3) Optical angular momentum and its application in manipulation, communication and imaging.