Professor Artur Ekert FRS: Publications

Quantum Physics from A to Z

ArXiv quant-ph/0505187 (2005)

Authors:

M Arndt, M Aspelmeyer, HJ Bernstein, R Bertlmann, C Brukner, JP Dowling, J Eisert, A Ekert, CA Fuchs, DM Greenberger, MA Horne, T Jennewein, PG Kwiat, ND Mermin, J-W Pan, EM Rasel, H Rauch, TG Rudolph, C Salomon, AV Sergienko, J Schmiedmayer, C Simon, V Vedral, P Walther, G Weihs, P Zoller, M Zukowski

Abstract:

This is a collection of statements gathered on the occasion of the Quantum Physics of Nature meeting in Vienna.

Experimental quantum cloning with prior partial information.

Phys Rev Lett 94:4 (2005) 040505

Authors:

Jiangfeng Du, Thomas Durt, Ping Zou, Hui Li, LC Kwek, CH Lai, CH Oh, Artur Ekert

Abstract:

When prior partial information about a state to be cloned is available, it can be cloned with a fidelity higher than that of universal quantum cloning. We experimentally verify this intriguing relationship between the cloning fidelity and the prior information by reporting the first experimental optimal quantum state-dependent cloner, using nuclear magnetic resonance techniques. Our experiments may further cast important implications into many quantum information processing protocols.

Asymptotic Estimation Theory for a Finite-Dimensional Pure State Model

Chapter in Asymptotic Theory of Quantum Statistical Inference, World Scientific Publishing (2005) 365-378

Optimal Universal Quantum Cloning and State Estimation

Chapter in Asymptotic Theory of Quantum Statistical Inference, World Scientific Publishing (2005) 379-385

Authors:

Dagmar Bruß, Artur Ekert, Chiara Macchiavello

Quantum information processing and communication: Strategic report on current status, visions and goals for research in Europe

European Physical Journal D 36:2 (2005) 203-228

Authors:

P Zoller, T Beth, D Binosi, R Blatt, H Briegel, D Bruss, T Calarco, JI Cirac, D Deutsch, J Eisert, A Ekert, C Fabre, N Gisin, P Grangiere, M Grassl, S Haroche, A Imamoglu, A Karlson, J Kempe, L Kouwenhoven, S Kröll, G Leuchs, M Lewenstein, D Loss, N Lütkenhaus, S Massar, JE Mooij, MB Plenio, E Polzik, S Popescu, G Rempe, A Sergienko, D Suter, J Twamley, G Wendin, R Werner, A Winter, J Wrachtrup, A Zeilinger

Abstract:

We present an excerpt of the document "Quantum Information Processing and Communication: Strategic report on current status, visions and goals for research in Europe", which has been recently published in electronic form at the website of FET (the Future and Emerging Technologies Unit of the Directorate General Information Society of the European Commission, http://www.cordis.lu/ist/fet/qipc-sr.htm). This document has been elaborated, following a former suggestion by FET, by a committee of QIPC scientists to provide input towards the European Commission for the preparation of the Seventh Framework Program. Besides being a document addressed to policy makers and funding agencies (both at the European and national level), the document contains a detailed scientific assessment of the state-of-the-art, main research goals, challenges, strengths, weaknesses, visions and perspectives of all the most relevant QIPC sub-fields, that we report here. Dedicated to the memory of Prof. Th. Beth, one of the pioneers of QIPC, whose contributions have had a significant scientific impact on the development as well as on the visibility of a field that he enthusiastically helped to shape since its early days. © EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2005.

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