CAUTION: The Sender of this email is not from within Dalhousie. *18th International Conference on Quantum Physics and Logic (QPL 2021), June 7-11, 2021. Online and Gda=F1sk, Poland* Given the ongoing COVID-19 situation, the main focus of QPL 2021 will now be the online component. The decision on the form that the on-site component of QPL 2021 will take, will be made a month prior to the conference. We understand that this may affect the travel options of the participants, especially visa applications, but unfortunately the impact on mobility that the pandemic has is beyond our control. As a result, the organisers and PC chairs have decided to extend the deadline for submissions by a month. CALL FOR PAPERS QPL is an annual conference that brings together researchers working on mathematical foundations of quantum physics, quantum computing, and related areas, with a focus on structural perspectives and the use of logical tools, ordered algebraic and category-theoretic structures, formal languages, semantical methods, and other computer science techniques applied to the study of physical behaviour in general. Work that applies structures and methods inspired by quantum theory to other fields (including computer science) is also welcome. QPL 2021 will be held both virtually online and physically in Gdansk (COVID permitting). More information at https://qpl2021.eu/ INVITED SPEAKERS Matty Hoban Flaminia Giacomini Anna Jencova Hl=E9r Kristj=E1nsson Ariel Bendersky Martha Lewis IMPORTANT DATES Submission deadline: March 12, 2021 Author notification: April 23, 2021 Early registration: May 14, 2021 Proceedings paper ready: May 28, 2021 Conference: June 7-11, 2021 SUBMISSION GUIDELINES Recent work that is relevant to the conference is solicited in one (or more) of three tracks: * Proceedings submissions consist of a 5-12 page extended abstract. Only proceedings-track submissions are eligible to be published in Electronic Proceedings in Theoretical Computer Science (EPTCS) after the conference. * Non-proceedings submissions consist of a 3 page extended abstract and a link to a separate published paper, pre-print, or an attached draft. * Poster submissions consist of a 1-3 page abstract and may contain a link to a separate published paper or pre-print. Submission of partial results of work in progress is encouraged. Submissions should be prepared using LaTeX, and must be submitted in PDF format. Use of the EPTCS style is encouraged. Submission is done via EasyChair: https://www.easychair.org/conferences/?conf=3Dqpl2021 BEST STUDENT PAPER There will be an award for the best student paper at the discretion of the programme committee. Papers eligible for the award are those where all the authors are students at the time of submission. PROGRAMME COMMITTEE Antonio Acin Barbara Amaral Pablo Arrighi Miriam Backens (co-chair) Jonathan Barrett Alessandro Bisio Anne Broadbent Ulysse Chabaud Bob Coecke Alejandro Diaz-Caro Ross Duncan Yuan Feng Alexandru Gheorghiu Stefano Gogioso Teiko Heinosaari Chris Heunen (co-chair) Matthew Hoban Kohei Kishida Aleks Kissinger Ravi Kunjwal Ciaran Lee Matt Leifer Martha Lewis Shane Mansfield Simon Martiel Hector Miller-Bakewell Mio Murao Glaucia Murta Ognyan Oreshkov Prakash Panangaden Simon Perdrix Lidia del Rio Julien Ross Mehrnoosh Sadrzadeh Ana Bel=E9n Sainz John Selby Rui Soares Barbosa Rob Spekkens Isar Stubbe Benoit Valiron Jamie Vicary John van de Wetering Alexander Wilce Mingsheng Ying Vladimir Zamdzhiev Margherita Zorzi The University of Edinburgh is a charitable body, registered in Scotland, w= ith registration number SC005336. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]