Single-electron computing without dissipation

Details Single-electron computing without dissipation Single-electron computing without dissipation

1997-11-18

arxiv.org/abs/quant-ph/9711034v1

Pisma Zh.Eksp.Teor.Fiz. 66 (1997) 275-279

Physics

Quantum Physics

5 pages, TeX, 1 Figure

Scientific paper

10.1134/1.567471

A possibility to perform single-electron computing without dissipation in the array of tunnel-coupled quantum dots is studied theoretically, taking the spin gate NOT (inverter) as an example. It is shown that the logical operation can be realized at the stage of unitary evolution of electron subsystem, though complete switching of the inverter cannot be achieved in a reasonable time at realistic values of model parameters. An optimal input magnetic field is found as a function of inter-dot tunneling energy and intra-dot Coulomb repulsion energy.

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