Research index·Journal articleWrite all about itPhysics World·1 Jan 2012DOI10.1088/2058-7058/25/01/8Journal articleWrite all about itPhysics World · 2012 · SubscriptionDOI10.1088/2058-7058/25/01/8ReadRead at the publisherSaveCiteAdd to literature reviewPaywalledThe full text is at the publisherOpen it at the publisher to read it.Read at the publisherDiscussionAdd to the discussionTopicsComputer scienceRelated papersMoreDetailsPublished, publisher, issueSuggest a correction or report