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Quantum dots

Through locks to narrows

In semiconductor quantum dots, single electron spins are surrounded by a bath of nuclear spins. Controlling the nuclear magnetization is difficult, but two experiments now demonstrate locking of the average nuclear field to a particular value and narrowing of the nuclear randomness.

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Figure 1: Dynamic nuclear-polarization mechanisms and detection techniques.


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Coish, W. Through locks to narrows. Nature Phys 5, 710–711 (2009).

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