Quantum logic gates based on coherent electron transport in quantum wires.
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.
Bertoni
A
A
Istituto Nazionale Fisica della Materia, Dipartimento di Fisica, Università di Modena e Reggio Emilia, via Campi 213/A, Modena, Italy.
Bordone
P
P
Brunetti
R
R
Jacoboni
C
C
Reggiani
S
S
D004583:Electrons; D007257:Information Theory; D008128:Logic; D008962:Models, Theoretical; D011789:Quantum Theory; D012666:Semiconductors