Livadaru, Lucian; Xue, Peng; Shaterzadeh-Yazdi, Zahra; DiLabio, Gino A; Mutus, Josh; Pitters, Jason L; Sanders, Barry C; Wolkow, Robert A
arXiv.org,
12/2011
Paper, Journal Article
Two closely spaced dangling bonds positioned on a silicon surface and sharing an excess electron are revealed to be a strong candidate for a charge qubit. Based on our study of the coherent dynamics of this qubit, its extremely high tunneling rate ~ 10^14 1/s greatly exceeds the expected decoherence rates for a silicon-based system, thereby overcoming a critical obstacle of charge qubit quantum computing. We investigate possible configurations of dangling bond qubits for quantum computing devices. A first-order analysis of coherent dynamics of dangling bonds shows promise in this respect.
