Closed Timelike Curves Make Quantum and Classical Computing Equivalent.

Scott Aaronson John Watrous Closed Timelike Curves Make Quantum and Classical Computing Equivalent. 2008 15 Electronic Colloquium on Computational Complexity (ECCC) http://eccc.hpi-web.de/eccc-reports/2008/TR08-092/index.html 092 db/journals/eccc/eccc15.html#AaronsonW08a