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Bearing the perturbation method in mind, and by focusing on the first order of approximation, the effect of Generalized Uncertainty Principle (GUP) on the Berry phase is investigated. Thereinafter, we apply the obtained formulation to quantum ring including two sorts of spin-orbit interactions, namely Rashba and Dresselhaus interactions, which are accessible for electrons. Finally, a comparison between the results and the accuracy of Berry phase detectors helps us in finding out β 0 < 1046 and β 0 < 1051 as the upper bounds on the GUP parameter inflicted by the Rashba and Dresselhaus interactions, respectively.

Synthesis of ultrafine Co1-(x+y)NixZnyFe2O4 magnetic nanoparticles with different chemical compositions is essential to study the magnetic fluid hyperthermia (MFH) as a treatment in which the superparamagnetic behaviour of materials is beneficial. In this paper, Co1-(x+y)NixZnyFe2O4 magnetic nanoparticles with different x and y amounts were synthesized to find out a tuning pattern for magnetic properties, especially anisotropy constant to gain the best heating efficiency. We proved that the co‐presence of ions will greatly affect the magnetic performance of our superparamagnetic nanoparticles in whichCo0.59Zn0.41Fe2O4 for values of x=0.00 and y=0.41 exhibits the highest magnetic anisotropy constant after CoFe2O4 CoFe2O4. This success in customizing magnetic properties to reach high magnetic properties by using less toxic materials might be another good starting point for researchers to focus more on their possible applications.

In this paper, we study the entanglement dynamics, its measure, and mean photon number of the field in the interaction between a quantized electromagnetic field and a 3-level atom surrounded by a nonlinear Kerr-like medium. Using the density matrix approach, we have calculated the time evolution of the entanglement and its magnitude at an arbitrary time, for different nonlinear coupling constant. Moreover, to show the effects of nonlinearity on the atom–field interaction and its relation with the entanglement the mean photon number of the field is also presented as a function of nonlinear coupling strength, χ. The results show that, envelope of entanglement fluctuation, their duration and amplitude strongly depend on the nonlinear coupling strength. Since the entanglement decreases with increasing nonlinearity, the mean number of photons reaches a constant value as a result of absorption increment by the surrounding medium.