Role of anharmonicity binding energy on the transition dynamics of GaAs quantum dot in presence of noise

Abstract

Present enquiry thoroughly explores the time-average excitation rate (TAER) of GaAs quantum dot (QD) pursuing the change in the anharmonicity binding energy (ABE) of the system and under the supervision of Gaussian white noise (GWN). The promotion of the ground state electronic density occurs due to various kinds of time-varying fluctuations viz. simple sinusoidal field (SSF), time-dependent confinement potential (TDCP), time-dependent magnetic field (TDMF), polychromatic radiation field (PRF), pulsed field (PF), chirped pulsed field (CPF), time-dependent anharmonicity constant (TDAC) and time-dependent noise strength (TDNS). GWN couples with the QD by additive and multiplicative modes. The work analyzes the consequence of joint influence of a few parameters that guides the attributes of the TAER diagrams. These parameters involve ABE, inclusion of GWN in a given pathway, the parity of the anharmonic potential and the type of the time-dependent perturbations. The TAER curves are enriched with steadfast rise, steadfast diminish, maximization (relevant to generation of large nonlinear optical properties), minimization and saturation (suggesting dynamic freezing). The findings highlight the utility of different kinds of time-dependent fluctuations to fine-tune the TAER among the GaAs QD eigenfunctions when the ABE of QD carries out a continual change.