Weimer, HendrikYao, NormanLukin, Mikhail2017-03-162013Weimer, Hendrik, Norman Y. Yao, and Mikhail D. Lukin. 2013. “Collectively Enhanced Interactions in Solid-State Spin Qubits.” Physical Review Letters 110 (6) (February 4). doi:10.1103/physrevlett.110.067601.0031-9007http://nrs.harvard.edu/urn-3:HUL.InstRepos:30782188We propose and analyze a technique to collectively enhance interactions between solid-state quantum registers composed from random networks of spin qubits. In such systems, disordered dipolar interactions generically result in localization. Here, we demonstrate the emergence of a single collective delocalized eigenmode as one turns on a transverse magnetic field. The interaction strength between this symmetric collective mode and a remote spin qubit is enhanced by the square root of the number of spins participating in the delocalized mode. Mediated by such collective enhancement, long-range quantum logic between remote spin registers can occur at distances consistent with optical addressing. A specific implementation utilizing nitrogen-vacancy defects in diamond is discussed and the effects of decoherence are considered.en-USJournal Article2017-03-1610.1103/PhysRevLett.110.067601