Yearly Archives: 2010

Our paper “Violation of local realism with freedom of choice” has just been published in the Proceedings of the National Academy of Sciences (PNAS). An explanatory post on a paper about Bell inequalities usually starts with recounting the history and controversy of entanglement starting in 1935. I’ll spare you this part, you’ve probably read it […]

Today, New Journal of Physics has published our paper “Matchgate quantum computing and non-local process analysis“. Matchgates are an intriguing class of two-qubit quantum logic gates. Circuits built up solely by matchgates, acting on neighbouring qubits, are efficiently simulatable classically. If the gates are however, allowed to act on any two qubits, which can be […]

Single-photon pair sources based on the nonlinear process of spontaneous parametric downconversion are still a relatively young development. They are however probably one of the most successful tools of modern experimental science in terms of the massive impact they had on the field of quantum information processing. They provided the first bright source of  entangled […]

We have a new paper, ‘Quantum entanglement distribution with 810 nm photons through telecom fibers‘, in Applied Physics Letters as of today (also available on the arXiv here). The experiment has been done in Thomas Jennwein’s group at IQC in Canada and demonstrates that entangled photons at 810 nm can be transmitted through 1550 nm, […]

QCMC is over and the physics entourage has moved on to the ICAP conference in Cairns or back home. Watching all those talks has prompted me to share my thoughts on chairing a conference session. Here they are: 1. Your Speakers The job of a session chair is really not that hard. It therefore always […]

In 5 days the QCMC 2010 is taking off here in Brisbane. We’re looking forward to one week of exciting Science and free coffee.

Th French magazine “Pour la Science” has just reprinted the 2008 Seed magazine article “The Reality Tests” on our Vienna Leggett inequality experiments. The original experiment on a violation of the Leggett inequality by Simon Groeblacher and colleagues garnered a lot of attention. My modest contribution was to perform more conclusive measurements for an inequality […]

Here’s another entry in the list of bizarre uses for the word quantum. I’m eagerly awaiting a UPS delivery and was quite surprised to find that they offer a “Quantum View”: It even sports a “visibility”, which means it has to be good!

I’m in the process of preparing a talk on our recent quantum walk paper. On the search for inspiration for an introduction to the topic, I was looking for an image to explain (classic) random walks. Google’s image search did a reasonable job, returning these images as the first three results: Decent enough, but not […]

Our lab has had a good start into the year. First, our paper “Towards quantum chemistry on a quantum computer” appeared in Nature Chemistry. This work has received quite a lot of media attention, as chronicled by our lab website. A short time later, we published an experiment on quantum control, “Experimental feedback control of […]