20.500.12556/RUL-128560 Qubit transformations on Rashba ring with periodic potential A spin-qubit transformation protocol is proposed for an electron in a mesoscopic quantum ring with tunable Rashba interaction controlled by the external electric field. The dynamics of an electron driven around the ring by a series of Landau–Zenner-like transitions between a finite number of local voltage gates is determined analytically. General single-qubit transformations are demonstrated to be feasible in a dynamical basis of localized pseudo-spin states. It is also demonstrated that by the use of suitable protocols based on changes of the Rashba interaction full Bloch sphere can be covered. The challenges of a possible realization of the proposed system in semiconductor heterostructures are discussed. quantum mechanics qubit transformations quantum rings Rashba coupling periodic potential kvantna mehanika kubitne transformacije kvantni obroči Rashbova sklopitev periodični potencial true false true Angleški jezik Slovenski jezik Članek v reviji 2021-07-19 15:29:14 2021-07-19 15:29:14 2022-09-07 04:15:57 0000-00-00 00:00:00 2020 0 0 15 str. no. 8, art. 083048 Vol. 22 Aug. 2020 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 530.145 1367-2630 10.1088/1367-2630/aba462 25663491 RAZ_Kregar_Ambroz_2020.pdf RAZ_Kregar_Ambroz_2020.pdf 1 B33405235CA9DFD838764A4719D202B2 d37bcb1670b6c8ee5f8056a1fe85739094557de0beb0b014c37939623c551bea ffd3a3c2-eb8a-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145508 https://iopscience.iop.org/article/10.1088/1367-2630/aba462 0 5d44c864-e895-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=145342 Fakulteta za strojništvo Fakulteta za matematiko in fiziko 0 0 0