I'm a physicist working on problems in quantum mechanics, especially:

See my publications for details.

While most of my research is theoretical, my students and I also run a laboratory that implements fundamental quantum experiments using entangled pairs of single photons. Our most recent experiments include:

My research in the news

APS Physics (2016) | Nature (2013) | Nature (2008) | Washington Post | NBC News | BBC News | ScienceNews | Technology Review | Physics Central | PhysicsWorld | ORF (in German) | Physik Journal (in German) | Der Standard (in German) | APA Science (in German)