?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.aulast=Usher&rft.au=Usher%2C+N&rft.aufirst=N&rft.issue=3&rft.title=Physical+Review+A&rft.issn=2469-9934&rft.atitle=Nonunitary+quantum+computation+in+the+ground+space+of+local+Hamiltonians&rft.volume=96&rft.date=12+September+2017&rft.genre=article