Double Quantum Dot

To the left a set of piezoelectric fingers generate a surface acoustic wave, an acoustic pulse which propagates across the surface of a structure in which two quantum dots are embedded. This wave excites an electron in one quantum dot (represented by a sort of red basket) to tunnel over into a nearby second quantum dot (the basket to the right).

Reported by: Naber et al., in Physical Review Letters, 7 April 2006

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