High fidelity universal gates for quantum bits form an essential ingredient of quantum information processing. In particular, geometric gates have attracted attention because they have a higher intrinsic resistance to certain errors. However, their realization remains a challenge because of the need for complicated quantum control on a multi-level structure as well as meeting the adiabatic cond...

Dilute Magnetic semiconductors has been attracting researchers due to their wide range of applications like spintronics devices such as spin-FET, spin-LED, nanoscale integrated magnetic memories & sensors etc. But most of practical applications requires curie temperature for DMS to be around room temperature or more. Hence different studies had been done world-wide for controlling the electrica...

Tunneling corrections to Landau-Zener rate coefficients for the vibrational relaxation NO(X(2)Π, v = 1) + Ar → NO(X(2)Π, v = 0) + Ar between 300 and 2000 K are determined employing ab initio potential energy surfaces calculated by the code provided by Alexander [J. Chem. Phys. 111, 7426 (1999)]. The calculations use a reaction coordinate approach and lead to vibronically nonadiabatic transition...

The fractional Zener constitutive law is frequently used as a model of solid-like viscoelastic behavior. In this work, class linear models type, which generalize the model, studied by use Bernstein functions technique. We prove that corresponding relaxation moduli are completely monotone under appropriate thermodynamic restrictions on parameters. Based property, we study propagation function an...

In an earlier paper we have concluded that time-dependent parameters in atom-mode interaction can be utilized to modify the quantum field in a cavity. When an atom shoots through the cavity field, it is expected to experience a trigonometric time dependence of its coupling constant. We investigate the possibilities this offers to modify the field. As a point of comparison we use the solvable Ro...

It is pointed out that there exists an interesting strong and weak duality in the Landau-Zener-Stueckelberg potential curve crossing. A reliable perturbation theory can thus be formulated in the both limits of weak and strong interactions. It is shown that main characteristics of the potential crossing phenomena such as the LandauZener formula including its numerical coefficient are well-descri...

We study a superconducting charge qubit coupled to an intensive electromagnetic field and probe changes in the resonance frequency of the formed dressed states. At large driving strengths, exceeding the qubit energy-level splitting, this reveals the well known Landau-Zener-Stückelberg interference structure of a longitudinally driven two-level system. For even stronger drives, we observe a sign...