Collectively Enhanced Interactions in Solid-State Spin Qubits

Abstract

We 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.

Locations

• Physical Review Letters - View - PDF
• arXiv (Cornell University) - View - PDF
• Digital Access to Scholarship at Harvard (DASH) (Harvard University) - View - PDF
• OSTI OAI (U.S. Department of Energy Office of Scientific and Technical Information) - View
• PubMed - View
• DataCite API - View