On almost every street corner in Prague, someone is handing out flyers for a concert in one of the city's historic churches. In one, it's a recital of Mozart; in another, Vivaldi. But on this balmy July evening, I join a crowd of physicists at the Bethlehem Chapel who have come to hear something less familiar: music by a contemporary composer, whose muse tonight is the science of quantum matter.

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But the two performances can't claim to have achieved great outreach. Half of the audience in New York were scientists, the rest what Jaz calls "science groupies". And owing to restrictions surrounding the use of the venue, the Prague event is not open to the public. Instead, it has been organized as a cultural evening for those attending a meeting on condensed matter, hosted by the European Physical Society.