QUROPE Quantum Information Processing and Communication in Europe

Ultracold atoms in optical lattices are a versatile tool to investigate fundamental properties of quantum many body systems. In particular, the high degree of control of experimental parameters has allowed the study of many interesting phenomena such as quantum phase transitions and quantum spin dynamics. Here we demonstrate how such control can be extended down to the most fundamental level of a single spin at a specific site of an optical lattice.

An interview with Anton Zeilinger in the Austrian newspaper Der Standard. (in german)

The French magazine La Recherche distinguished Prof. Antonio Acin (ICFO, Q-ESSENCE Partner), Prof. Serge Massar and  Dr. Stefano Pironio (Université Libre de Bruxelles, Belgium) with an award meant to highlight exceptional work during the year carried out in the fracophone region. The title of the contribution, based on the scientific article that appeared in Nature in April, is “La certitude de l’aléa quantique”.

The Basler Zeitung brings a video about quantum computing (in German).

On-line collection of quantum physics related articles in Der Spiegel (in German).

We give new evidence that quantum computers -- moreover, rudimentary quantum computers built entirely out of linear-optical elements -- cannot be efficiently simulated by classical computers. In particular, we define a model of computation in which identical photons are generated, sent through a linear-optical network, then nonadaptively measured to count the number of photons in each mode. This model is not known or believed to be universal for quantum computation, and indeed, we discuss the prospects for realizing the model using current technology.

The New York Times on "Quantum Computing Reaches for True Power".