title: Quantum logic gates based on coherent electron transport in quantum wires.
abstract: It is shown that the universal set of quantum logic gates can be realized using solid-state quantum bits based on coherent electron transport in quantum wires. The elementary quantum bits are realized with a proper design of two quantum wires coupled through a potential barrier. Numerical simulations show that (a) a proper design of the coupling barrier allows one to realize any one-qbit rotation and (b) Coulomb interaction between two qbits of this kind allows the implementation of the CNOT gate. These systems are based on a mature technology and seem to be integrable with conventional electronics.
authors.affiliation: Istituto Nazionale Fisica della Materia, Dipartimento di Fisica, Università di Modena e Reggio Emilia, via Campi 213/A, Modena, Italy.
authors.forename: A
authors.initials: A
authors.lastname: Bertoni
authors.forename: P
authors.initials: P
authors.lastname: Bordone
authors.forename: R
authors.initials: R
authors.lastname: Brunetti
authors.forename: C
authors.initials: C
authors.lastname: Jacoboni
authors.forename: S
authors.initials: S
authors.lastname: Reggiani
mesh_terms: D004583:Electrons; D007257:Information Theory; D008128:Logic; D008962:Models, Theoretical; D011789:Quantum Theory; D012666:Semiconductors