Resonant Cooling of Nuclear Spins in Quantum Dots

Details Resonant Cooling of Nuclear Spins in Quantum Dots Resonant Cooling of Nuclear Spins in Quantum Dots

2007-05-15

arxiv.org/abs/0705.2177v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 figures

Scientific paper

We propose to use the spin-blockade regime in double quantum dots to reduce nuclear spin polarization fluctuations in analogy with optical Doppler cooling. The Overhauser shift brings electron levels in and out of resonance, creating feedback to suppress fluctuations. Coupling to the disordered nuclear spin background is a major source of noise and dephasing in electron spin measurements in such systems. Estimates indicate that a better than 10-fold reduction of fluctuations is possible.

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