Please note change of room - now in D463 Star *Speaker:* Yuri Gurevich , Microsoft Research *Date:* Tuesday, October 06, 2015 *Time:* 11:00 AM to 12:15 PM *Location:* D463 Star *Host:* Scott Aaronson *Abstract: * No-go theorems assert that hidden-variable theories, subject to appropriate hypotheses, cannot reproduce the predictions of quantum theory. We examine two species of such theorems, value no-go theorems and expectation no-go theorems. The former assert that hidden-variables cannot match the predictions of quantum theory about the possible values resulting from measurements; the latter assert that hidden-variables cannot match the predictions of quantum theory about the expectation values of measurements. We sharpen the known results of both species, which allows us to clarify the similarities and differences between the two species. We also repair some flaws in existing definitions and proofs. This is joint work with Andreas Blass of the University of Michigan. The paper can be found at arXiv:1509.06896. -- Deborah Goodwin Assistant to Profs. S Aaronson, S Goldwasser, D Moshkovitz, and R Rivest MIT CSAIL 32 Vassar St., G675A Cambridge, MA 02139 Phone: 617.324.7303 _______________________________________________ qip mailing list qip(a)mit.edu http://mailman.mit.edu/mailman/listinfo/qip