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Delft researchers developing quantum ccd
Researchers at TU Delft have managed to create an arrangement that can be compared with a charge-coupled device for electrons with a particular spin. Thus it was possible to transport individual electrons maintaining their spin on a relatively large distance.
The researchers call their version of the CCD also single-spin ccd. In the single-spin ccd electrons maintaining their spin as it were shifted one by one along a row without the spin of the electrons changes, explains researcher Tim Baart on the university’s website. Then, the spin at the end of the row read out.
In the case of single-spin ccd from the study of the Delft, there is a row of three quantum dots. Quantum dots are a kind of “buckets” in which some electrons with a particular spin ‘saved’. The three electrons are always shifted one step with the aid of electric fields. At the end of the chain, they are then in another quantum dot is read out.
The technique may perhaps be used in quantum computers to store quantum information, moving spin of electrons from one processor to another, to exchange information between two quantum dots or to move quantum information between spins of electrons and polarized photons.Viewing:-213
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