Disentangling the exchange coupling of entangled donors in the Si quantum computer architecture

Details Disentangling the exchange coupling of entangled donors in the Si quantum computer architecture Disentangling the exchange coupling of entangled donors in the Si quantum computer architecture

2002-07-18

arxiv.org/abs/cond-mat/0207455v2

Phys. Rev. Lett. 90, 067401 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Title changed. Other minor changes

Scientific paper

10.1103/PhysRevLett.90.067401

We develop a theory for micro-Raman scattering by single and coupled two-donor states in silicon. We find the Raman spectra to have significant dependence on the donor exchange splitting and the relative spatial positions of the two donor sites. In particular, we establish a strong correlation between the temperature dependence of the Raman peak intensity and the interdonor exchange coupling. Micro-Raman scattering can therefore potentially become a powerful tool to measure interqubit coupling in the development of a Si quantum computer architecture.

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