Joint Seminar on Quantum Information and Technologies

Diamond is a proven solid-state platform for spin-based quantum technology. The nitrogen-vacancy center in diamond has been used to realize small-scale quantum information processing and quantum sensing under ambient conditions. A major barrier in the development of large-scale quantum information processing in diamond is the connection of nitrogen-vacancy spin registers by a quantum bus at room temperature. Given that diamond is expected to be an ideal spin transport material, the coherent transport of spin directly between the spin registers offers a potential solution. Yet, there has been no demonstration of spin transport in diamond due to difficulties in achieving spin injection and detection via conventional methods. In this talk we will discuss novel mechanisms to photoionize, transport, and capture spin-polarized electrons in diamond at room temperature [1]. Having identified these mechanisms, we will explore how they may be combined to realize an on-chip spin quantum bus. Recent experiments to test some of the ideas along the outlined path will be also presented [2].[1] M. W. Doherty, C. A. Meriles, A. Alkauskas, H. Fedder, M. J. Sellars, and N. B. Manson, Phys. Rev. X 6, 041035 (2016).[2] S. Dhomkar, P. R. Zangara, J. Henshaw, N. B. Manson, M. W. Doherty, A. Alkauskas, and C. A. Meriles, submitted (2017).