Analyzing magnetic susceptibility of impurity doped quantum dots in presence of noise

Present investigation deals with the exploration of magnetic susceptibility ( χ ) of doped GaAs quantum dot (QD) in a noisy ambience and following the variations of a few important physical quantities. The focus being to understand the interplay between noise and those physical quantities and how the interplay happens to modulate χ . Noise invoked here is of Gaussian white character and the impurity potential is also represented by a Gaussian function. The physical parameters involve magnetic field, confinement potential, dopant location, dopant potential, noise strength, aluminium concentration (in view of Al x Ga 1 - x As alloy QD), spatially-varying effective mass, spatially-varying dielectric screening function, anisotropy, hydrostatic pressure (HP) and temperature. The study also reveals the importance of the mode through which noise may enter the system. Whereas the additive mode of application of noise fails to affect χ noticeably from a noise-free state; the multiplicative mode of applying noise does the same quite conspicuously. Moreover, in general, whereas the system exhibits diamagnetism in absence of noise and under the supervision of additive noise; it is multiplicative noise which often induces paramagnetism in the system.