Background: Normal metal mesoscopic rings are being used in designing quantum logical
gates due to the quantum interference effect and quantum confinement. This study focused on examining
electronic transport through normal metal mesoscopic rings that have one dimension, and suggested
how such rings can be employed to design nanoscale AND gate. A double mesoscopic ring was utilized
for AND gate operation, every ring was threaded by magnetic flux, and the magnetic flux was considered
as the key tuning parameter in the AND gate action. For a particular value of magnetic flux equal
to the half of elementary flux-quantum, a logical AND gate operation was used depending on the applied
gate voltages. Two gate voltages were externally applied to the lower arm of every ring, which
acted as the two inputs of the AND gate. Few relevant patents to the designing and fabrication of quantum
logical gates have been reviewed and cited.
Methods: All the calculations are based on the time-dependent Hamiltonian model, the steady state is
used to obtain the transmission probability.
Results: The transmission probability, the current and the noise power of current fluctuations were calculated
in the weak-coupling and strong-coupling regimes.
Conclusion: This study paved the way for the production of an electronic logic gate.