, published 8 April 1999 , doi: 10.1098/rspa.1999.0370 455 1999 Proc. R. Soc. Lond. A Stefan Bernet, Roland Abfalterer, Claudia Keller, Jörg Schmiedmayer and Anton Zeilinger helicity Matter wave sidebands from a complex potential with temporal Email alerting service here corner of the article or click Receive free email alerts when new articles cite this article - sign up in the box at the top right-hand http://rspa.royalsocietypublishing.org/subscriptions go to: Proc. R. Soc. Lond. A To subscribe to on August 13, 2013 rspa.royalsocietypublishing.org Downloaded from