Padmanabhan, T.2012-03-032012-03-032009-10-16http://hdl.handle.net/11007/206Obtaining the classical limit of quantum mechanics turns out to be conceptually and operationally non-trivial and, even today, some of the experts consider this issue to be unsettled. There is a function, originally devised by Wigner, which plays a key role in this aspect and throws some light on the way the classical world emergence from the quantum description.enWigner functionSemi-classical limitPhase spaceArticle