6th QPL workshop on Quantum Physics and Logic April 8-9, 2009, Oxford, UK This event has as its goal to bring together researchers working on mathematical foundations of quantum physics, quantum computing and spatio-temporal causal structures, and in particular those that use logical tools, ordered algebraic and category-theoretic structures, formal languages, semantical methods and other computer science methods for the study physical behaviour in general. Over the past couple of years there has been a growing activity in these foundational approaches together with a renewed interest in the foundations of quantum theory, which complement the more mainstream research in quantum computation. A predecessor of this event, with the same acronym, called Quantum Programming Languages, was held in Ottawa (2003), Turku (2004), Chicago (2005) and Oxford (2006). The first QPL under the new name Quantum Physics and Logic was held in Reykjavik (2008); with the change of name and a new program committee we emphasise the intended much broader scope of this event, aiming to nourish interaction between modern computer science logic, quantum computation and information, models of spatio-temporal causality, and quantum foundations, which resulted in an attractive program. The event proceeds MFPS 2009, also in Oxford, at which there will a series of tutorials to enable MFPS participants to also attend and comprehend the QPL talks. Invited speakers: Reinhard Werner (Braunschweig) Giacomo Mauro D'Ariano (Pavia) TBA (-) Workshop co-chairs: Bob Coecke (Oxford) Prakash Panangaden (McGill) Peter Selinger (Dalhousie) Program Committee: Howard Barnum (Los Alamos) Dan Browne (UCL - Londen) Paul Busch (York) Bob Coecke (Oxford) Andreas Doering (Imperial) John Harding (NMSU) Viv Kendon (Leeds) Keye Martin (NRL) Prakash Panangaden (McGill) Peter Selinger (Dalhousie) TBA (-) Deadlines: February 13: Submission February 27: Notification of authors March 20: Corrected papers due Webpage: http://web.comlab.ox.ac.uk/people/Bob.Coecke/QPL_09.html Webpage of previous Quantum Physics and Logic: http://web.comlab.ox.ac.uk/people/Bob.Coecke/DCM_QPL_08.html Papers at previous Quantum Physics and Logic: http://www.comlab.ox.ac.uk/people/bob.coecke/DCM_QPL_08_accepted.html Webpage of MFPS XXV: http://www.math.tulane.edu/~mfps/mfps25.htm Submission procedure. Prospective speakers are invited to submit a 2-5 pages abstract which provides sufficient evidence of results of genuine interest and provides sufficient detail to allows the program committee to assess the merits of the work. Submissions of works in progress are encouraged but must be more substantial than a research proposal. We both encourage submissions of original research as well as research submitted elsewhere. Authors of accepted original research contributions will be invited to submit a full paper to a special issue of a journal yet to be decided on. Submissions should be in Postscript or PDF format and should be sent to Bob Coecke by February 13, with as subject line QPL Submission. Receipt of all submissions will be acknowledged by return email. Accepted contributors will be able to publish extended versions of their 2-5 abstracts in Electronic Notes in Theoretical Computer Science. The workshop enjoys support from: EPSRC Network Semantics of Quantum Computation (EP/E006833/1) EPSRC ARF The Structure of Quantum Information and its Applications to IT (EP/D072786/1) EC Foundational Structures for Quantum Information and Computation (FP6 STREP QICS)