QUIE2T Quantum Information Entanglement-Enabled Technologies

 - Quantum key distribution with continuous variables: theoretical and experimental work on long-distance system performance and side channel induced attacks

- Quantum cryptographic primitives: theoretical and experimental work on secret sharing, coin flipping, entanglement verification in the presence of adversaries

- Theory of Quantum Computation and Quantum Information including measurement-based quantum computing, entanglement theory and foundations of physics

On the 4th of February 2011 the European Commission has sent us the official approval to our request to add Basel Universität (UNIBAS) among the AQUTE partners, following the move of Professor Philipp Treutlein from München (LMU, AQUTE partner P11) to Basel.

SQR Technologies is a young and dynamic startup in preparation since 2007 and founded in 2010. It is a spinoff of the ULB's Centre for Quantum Information and Communication. SQR specializes in hardware security for datacenters with the mission to develop the next platform of cloud security solutions by exploiting the laws of quantum physics. 

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.

*Masters/ MSc course in Quantum Information and Coherence, Department of
Physics, University of Strathclyde, Glasgow*

This taught MSc course offers a comprehensive overview of the emerging
applications of quantum physics to information processing and quantum
coherent devices. The course syllabus includes important topics such as:

* Quantum Information Science. This teaches how quantum phenomena may be
used to process information in novel ways that outperform existing
information processing technologies.

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.

 Considerable efforts are currently devoted to the preparation of ultracold neutral atoms in the emblematic strongly correlated quantum Hall regime. The routes followed so far essentially rely on thermodynamics, i.e. imposing the proper Hamiltonian and cooling the system towards its ground state. In rapidly rotating 2D harmonic traps the role of the transverse magnetic field is played by the angular velocity.

 We propose a scheme involving cold atoms trapped in optical lattices to observe different phenomena traditionally linked to quantum–optical systems. The basic idea consists of connecting the trapped atomic state to a non-trapped state through a Raman scheme. The coupling between these two types of atoms (trapped and free) turns out to be similar to that describing light–matter interaction within the rotating–wave approximation, the role of matter and photons being played by the trapped and free atoms, respectively.

 We study the ground state phases of the S = 1=2 Heisenberg quantum antiferromagnet on the spatially anisotropic triangular lattice and on the square lattice with up to next-next-nearest neighbor coupling (the J1J2J3 model), making use of Takahashi’s modified spin-wave (MSW) theory supplemented by ordering vector optimization. We compare the MSW results with exact diagonalization and projected-entangled-pair-states calculations, demonstrating their qualitative and quantitative reliability.