Quantum Ring in a Magnetic Field: High Harmonic Generation and NOT Logic Gate

Abstract

The effect of a static magnetic field on the high harmonic generation (HHG) from a quantum ring driven by one laser polarized along the x‐axis is studied. The spin polarization and the temporal emission of the harmonics are studied by varying the intensity of the magnetic field and it is shown how these results have a significant technological impact in computer technology; in fact a boolean algebra can be implemented by assigning 0 and 1 values to low and high pulse intensities of the emitted harmonics and logic gates like the NOT can be created.

Microwave-driven persistent currents in a nanoscale quantum ring

“…Recently, the same high-harmonics emission technique was developed in the solid state (Vampa et al 2015;Sivis et al 2017;Bai et al 2020), while the underlying mechanism for this phenomenon remains debatable. Cricchio and Fiordilino (2020) studied an effect of a static magnetic field on the harmonic spectrum emitted by the ring driven by an intense laser field and substantiated the applicability of such devices for controlling the quantum information and creating NOT logic gates.…”

Laser Assisted Dirac Electron in a Magnetized Annulus

“…As mentioned in the Introduction, a plethora of schemes, requiring the presence of a magnetic field, has been advanced to overpass the problem. Rings and annuli are perfectly suitable to be used with a magnetic field because of their circular symmetry; they provide a fundamental environment for basic and applicative use [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35]. Now, we discuss the problem of the annulus crossed by an orthogonal static magnetic field B 0 .…”

“…Subsequently, it is possible, by using the orbital angular momentum m and the magnetic field B 0 as control knobs of an experiment, to produce filiform currents circulating in a reduced portion of the annulus. Such currents may be used in informatics technology [20,29,31,34,35,[37][38][39][40][41][42]. Furthermore, an adiabatic increase of B 0 does not induce transition amongst the levels, but pushes the electron towards large ρ.…”

Dynamic clock generator and memory mass device using a quantum ring driven by three-color laser fields

“…In this case, the electron spin can be exploited and fast logic gates can be investigated. 10,11 A point of interest lies in large graphene annuli 7 where the peculiar dispersion properties of massless Dirac electrons can be utilised to create localised liform currents of large angular momentum apt to store many bits of information.…”