QUROPE Quantum Information Processing and Communication in Europe

The ability to sensitively detect individual charges under ambient conditions would benefit a wide range of applications across disciplines. However, most current techniques are limited to low-temperature methods such as single-electron transistors, single-electron electrostatic force microscopy and scanning tunnelling microscopy. Here we introduce a quantum-metrology technique demonstrating precision three-dimensional electric-field measurement using a single nitrogen-vacancy defect centre spin in diamond. An a.c.

The Laboratory for Atomic, Molecular and Optical Physics in Toruń is a national consortium involving among other institutions University of Warsaw, a partner in the Q-ESSENCE project. One of the themes of the symposium will be quantum-enhanced metrology. The meeting will provide a platform to exchange ideas and recent development with other sub-fields of modern metrology.
For further information please visit the event's website: http://famo.fizyka.umk.pl/qmet/.

The Q-ESSENCE project meeting will take place during the QIPC 2011 conference in Zurich. The exact time is 16:30-18:50 on the Friday 9th September 2011. A joint dinner will follow afterwards.

Considerable efforts are currently devoted to the preparation of ultracold neutral atoms in the strongly correlated quantum Hall regime. However, the necessary angular momentum is very large and in experiments with rotating traps this means spinning frequencies extremely near to the deconfinement limit; consequently, the required control on parameters turns out to be too stringent. Here we propose instead to follow a dynamic path starting from the gas initially confined in a rotating ring.

We study the single particle dynamics of a mobile non-Abelian anyon hopping around many pinned anyons on a surface, by modeling it with a discrete time quantum walk. During the evolution, the spatial degree of freedom of the mobile anyon becomes entangled with the fusion degrees of freedom of the collective system. Each quantum trajectory makes a closed braid on the world lines of the particles establishing a direct connection between statistical dynamics and quantum link invariants.

This one-day workshop on the physics, technology and application of single-photon detectors based on superconducting nanowires will take place on Friday September 23, 2011, in Eindhoven, The Netherlands. It will be a satellite workshop of the EUCAS 2011 - Superconductivity Centennial Conference (The Hague, September 18-23).

The 1st International Conference on Quantum Technologies will take place in Moscow on July 13-17, 2011. It is planned as a kick-off meeting of the fresh born Russian Quantum Center. This interdisciplinary meeting will bring together about 60-80 experts from various fields of physics exploring frontiers of quantum technologies and will include sessions on

• mesoscopic physics,
• quantum optics,
• ultra-cold atoms and molecules,
• quantum information,
• quantum communication.

The aim of this workshop is to bring together experts in different fields to compare experiences, approaches and strategies to control entanglement in different solid state quantum systems, such as nuclear & electronic spins, quantum dots & wires, superconducting & hybrid structures, impurities in solids, polaritons, etc. More specifically,
topics involved are:
-control, generation, robustness and transfer of entanglement;
-measurement of entanglement.