Phys. Rev. Lett. 91, 017402 (2003) [4 pages]Optical Pumping of Quantum-Dot Nuclear SpinsReceived 26 March 2003; published 3 July 2003 Hyperfine interactions with randomly oriented nuclear spins present a fundamental decoherence mechanism for electron spin in a quantum dot, that can be suppressed by polarizing the nuclear spins. Here, we analyze an all-optical scheme that uses hyperfine interactions to implement laser cooling of quantum-dot nuclear spins. The limitation imposed on spin cooling by the dark states for collective spin relaxation can be overcome by modulating the electron wave function. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.91.017402
DOI:
10.1103/PhysRevLett.91.017402
PACS:
78.67.Hc, 72.25.Fe, 75.75.+a
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