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Quantum computing based on space states without charge transfer

V. Vyurkov ; S. Filippov ; Leonid Y. Gorelik (Institutionen för teknisk fysik, Kondenserade materiens teori)
Physics Letters A (0375-9601). Vol. 374 (2010), 33, p. 3285-3291.
[Artikel, refereegranskad vetenskaplig]

An implementation of a quantum computer based on space states in double quantum dots is discussed. There is no charge transfer in qubits during a calculation, therefore, uncontrolled entanglement between qubits due to long-range Coulomb interaction is suppressed. Encoding and processing of quantum information is merely performed on symmetric and antisymmetric states of the electron in double quantum dots. Other plausible sources of decoherence caused by interaction with phonons and gates could be substantially suppressed in the structure as well. We also demonstrate how all necessary quantum logic operations, initialization, writing, and read-out could be carried out in the computer. (C) 2010 Elsevier B.V. All rights reserved.

Nyckelord: Quantum computing, Charge qubits, Quantum dots, Decoherence, dots, barrier, qubits, gates

Denna post skapades 2010-08-10.
CPL Pubid: 124327


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