QUROPE Quantum Information Processing and Communication in Europe

We study the nonequilibrium dynamics of correlations in quantum lattice models in the presence of long-range interactions decaying asymptotically as a power law. For exponents larger than the lattice dimensionality, a Lieb-Robinson-type bound effectively restricts the spreading of correlations to a causal region, but allows supersonic propagation. We show that this decay is not only sufficient but also necessary.

We study the edge physics of gapped quantum systems in the framework of Projected Entangled Pair State (PEPS) models. We show that the effective low-energy model for any region acts on the entanglement degrees of freedom at the boundary, corresponding to physical excitations located at the edge. This allows us to determine the edge Hamiltonian in the vicinity of PEPS models, and we demonstrate that by choosing the appropriate bulk perturbation, the edge Hamiltonian can exhibit a rich phase diagram and phase transitions.

Entangled states are a key resource in fundamental quantum physics, quantum cryp-tography, and quantum computation [1].To date, controlled unitary interactions applied to a quantum system, so-called "quantum gates", have been the most widely used method to deterministically create entanglement [2].

Bristol University’s centre for quantum photonics has hooked up its quantum chip to the web. Anyone interested in quantum physics or computing can follow a link to Bristol’s Qcloud and try an experiment on a quantum simulator, before running it on a real quantum computer. Read the whole article at www.techweekeurope.co.uk.

In addition to the scientific program, the 2013 QIPC conference comprised sessions that were of interest beyond the scientific community, and that continued the tradition of similar activities at earlier QIPC conferences. Adjusted to the vocation of QUIE²T, these activities included an ‚Industry Session‘, an ‚EU funding session‘ and the ceremony for the ‚QIPC Young Investigator Award‘.

Come along to the Oxford University Museum of Natural History, Parks Road, from 5:30pm on Thursday 6th June for an evening of 3 fascinating talks about quantum mechanics – the strangest theory ever to be correct!

The BBC reports this story about a quantum computer to be shared by Google, Nasa, and other scientists. Read the whole article at www.bbc.co.uk.