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Implementation of an all‐optical spin‐based quantum computer
Author(s) -
Pazy E.,
Calarco T.,
D'Amico I.,
Zanardi P.,
Rossi F.,
Zoller P.
Publication year - 2003
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.200303154
Subject(s) - pauli exclusion principle , physics , spin (aerodynamics) , quantum technology , quantum mechanics , quantum network , quantum error correction , spin engineering , quantum dot , quantum gate , open quantum system , quantum computer , electron , quantum , spin polarization , thermodynamics
Abstract An all‐optical implementation scheme of a spin‐based quantum computer is presented. Our quantum memory consists of the spin of electrons confined to quantum dots. Utilizing the Pauli blocking effect we are able to have ultra‐fast control and read out of the electronic spin degrees of freedom by conditionally coupling them with charged excitations of the quantum dot. Imperfections effecting gate operations are discussed and we show that final readout can still be performed by a quantum‐jump technique even in the presence of hole mixing, when the Pauli‐blocking selection rule is violated.