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Current inspection strives to perform a detailed elaboration of the Tsallis entropy‐based magnetocaloric effect (MCE) of GaAs quantum dot (QD) doped with Gaussian impurity and under applied Gaussian white noise. Noise takes additive and multiplicative pathways for its entry to the doped QD. MCE has been found to decrease following the enhancement of temperature. The enquiry manifests magnetic field‐induced confinement and consequent decline in the disorder of the system during the gradual variation of several physical parameters. However, harnessing the extent of above confinement involves extremely sensitive and delicate control over the resultant influence of the particular physical parameter undergoing change, its range of magnitude, application of noise and its mode of inclusion. Importantly, MCE has been found to maximize only during the change in the strength of the dopant potential under multiplicative noise. And, on most occasions, multiplicative noise profoundly raises the MCE over its value under the state devoid of noise and under additive noise. [ABSTRACT FROM AUTHOR]

In the present enquiry, an in‐depth analysis of internal energy, entropy, heat capacity, and Helmholtz free energy of GaAsquantum dot (QD) which contains Gaussian impurity as dopant and falls under the influence of applied Gaussian white noise (GWHN) is performed. GWHN takes additive and multiplicative routes for its entrance to the doped QD. In this study, highly delicate and complex interplay between temperature, presence/absence of GWHN, mode of incorporation of GWHN, and the particular physical parameters concerned is unveiled. The said interplay, in effect, designs the features of the thermal properties. The enquiry uncovers competitive behavior between thermal disorder and spatial disorder that also affects the said thermodynamic properties. [ABSTRACT FROM AUTHOR]

In the present investigation, the Shannon entropy‐based magnetocaloric effect (MCE) of GaAs quantum dot (QD) is explored under the simultaneous influence of anharmonicity and Gaussian white noise (GWHN). The symmetry of the anharmonic potential (AHP), the manner of incorporation of GWHN, and the QD confinement interplay with great intricacy to tailor the MCE. AHP of odd (even) symmetry reduces (increases) the confinement of the system relative to the anharmonicity‐free system. Generally, the MCE profiles behave in diverse manner under additive white noise and multiplicative white noise and often show deviation from the noise‐free condition. It is also found that additive (multiplicative) noise lowers (raises) the magnitude of MCE in comparison with the noise‐free values. [ABSTRACT FROM AUTHOR]

This paper explores the role of spatial extension of impurity (SEI) on two nonlinear optical (NLO) properties and two other related properties of impurity doped GaAs quantum dot (QD). The NLO properties include the electro-optic effect (EOE) and the third-order nonlinear optical susceptibility (TONOS) whereas the other two related properties being total optical dielectric function (TODF) and the intraband transition lifetime (ITL). The study also involves Gaussian white noise (GWN) which has been introduced to the doped QD through additive and multiplicative pathways. The investigation unveils the subtle interplay between GWN and SEI which ultimately fine-tunes the said NLO properties. TODF, EOE and TONOS manifest red-shift with enhancement of SEI both with and without GWN. The ITL, on the other hand, exhibits monotonic growth with increase in SEI under all conditions. Moreover, the application of GWN causes noticeable quenching of the NLO properties. And the quenching becomes more stringent in presence of multiplicative noise than its additive counterpart. [ABSTRACT FROM AUTHOR]

This work examines the role of spatial impurity extension (SIE) on a few nonlinear optical (NLO) properties of impurity-doped GaAs quantum dot (QD). The NLO properties considered are the nonlinear optical rectification (NOR), the second harmonic generation (SHG) and the third harmonic generation (THG). The study also includes 1 (GWN) which has been incorporated into the doped QD through additive and multiplicative pathways. The study uncovers the delicate interplay between GWN and SIE which ultimately fabricates the said NLO properties. NOR, SHG and THG manifest red-shift with enhancement of SIE both with and without GWN. The study also shows possibilities of attaining maximum NLO response by prudently applying GWN in a particular pathway. Depending upon the particular NLO property concerned, the presence of noise and its mode of application can either deplete or amplify it to different extents with respect to the noise-free situation. [ABSTRACT FROM AUTHOR]

Current work performs a comprehensive exploration of the internal energy, entropy, heat capacity, and Helmholtz free energy of GaAsquantum dot (QD) under the joint influence of anharmonicity and Gaussian white noise (GWHN). The symmetry of the anharmonic potential (odd/even), the mode of application of GWHN (additive/multiplicative), and the QD confinement get involved in a highly intricate interplay to harness the said thermodynamic properties. Anharmonicity of odd (even) parity lowers (raises) the confinement of the system with respect to the anharmonicity-free state. Most often, multiplicative noise results into greater deviation of the thermodynamic properties (from the noise-free situation) than its additive neighbor. Added to this, applied additive (multiplicative) noise enhances (diminishes) the magnitudes of the thermal properties with respect to their noise-free values. The study also exhibits rivalry between thermal disorder and spatial disorder which marks its signature on the profiles of the said thermal properties. Plot of entropy vs temperature for even anharmonicity in presence and absence of noise [ABSTRACT FROM AUTHOR]

The present study thoroughly explores the time‐average population transfer rate (TAPTR) of impurity‐doped GaAs quantum dot (QD) pursuing the change in the spatial impurity spread (SIS). The said excitation rate is studied under the influence of Gaussian white noise (GWN). The rise of the ground‐state electronic density takes place due to different types of time‐changing fluctuations, viz. simple sinusoidal field, time‐dependent confinement potential, and time‐dependent magnetic field. GWN couples with the QD by additive and multiplicative modes. In this work, the joint influence of SIS and GWN and its pathway of inclusion and the nature of the time‐dependent perturbations are examined on the attributes of the TAPTR. The TAPTR curves are composed of steadfast rise, steadfast diminish, maximization (relevant to generation of large nonlinear optical properties), minimization, and saturation (suggesting dynamic freezing). The findings elucidate the means of fine‐tuning the TAPTR among the doped GaAs QD eigenstates in presence of noise, when the SIS undergoes a gradual change. [ABSTRACT FROM AUTHOR]

The study meticulously inspects the time‐average excitation rate (TAER)of lowest energy state electronic probability of GaAs quantum dot (QD)to the higher energy states. The excitation occurs as the anharmonic potential(a part of QD confinement) starts varying with time either periodicallyor randomly. The anharmonic potential is characterized by either evenor oddparity. Gaussian white noise (GWN)has also been introduced to the QD either via additiveor multiplicativemode. The study announces that the coupled impact of the given physical quantity, the symmetry of the anharmonicity, presence/absence of noise, the route of entrance of noise, and the nature of time progress of anharmonicity constant, ultimately regulates and fine‐tunes the attributes of the TAER diagrams. The TAER diagrams comprise of regular rise, regular fall, maximization (pertinent to production of high value of nonlinear optical (NLO) properties), minimization and saturation (pertinent to dynamic freezing). The outcomes of the study seem to be recognizable in various applications of devices containing QD. [ABSTRACT FROM AUTHOR]

This work scrutinizes the time‐average excitation rate (TAER) among the GaAs quantum dot (QD) eigenstates under the aegis of Gaussian white noise (GWN) and the parity of the anharmonic potential (odd/even). GWN connects with the system by additive or multiplicative mode. The said excitation of the ground state population has been triggered by an external field which may be a polychromatic radiation field (PRF), or pulsed field (PF) or chirped pulsed field (CPF). The study reveals the subtle nuances of the interplay between noise (additive or multiplicative), anharmonicity (odd or even) and the external field (PRF, PF or CPF) that finally govern the attributes of the TAER diagrams. The TAER profiles exhibit persistent growth, persistent decline, maximization (important in view of production of prominent nonlinear optical properties), minimization and saturation (relevant to the dynamic freezing). The findings appear useful for regulating the TAER among the GaAs QD eigenstates which have substantial technological relevance. [ABSTRACT FROM AUTHOR]

Current inspection rigorously explores the tuning of a few relevant nonlinear optical (NLO)properties of GaAs quantum dot (QD) under the stewardship of Gaussian noise-anharmonicity interplay. The NLO properties explored are total optical absorption coefficient (TOAC), total optical refractive index change (TORIC), nonlinear optical rectification (NOR), second harmonic generation (SHG), third harmonic generation (THG), DC-Kerr effect (DCKE), electro-absorption coefficient (EAC), group index (GI)and optical gain (OG). The route of application of noise (additive/multiplicative) to the QD, as well as the symmetry (odd/even) of the anharmonicity, influence the aforesaid NLO properties. These NLO properties exhibit steadfast growth, steadfast fall, maximization, minimization and saturation. The outcomes of the inspection appear to be quite pertinent in the context of the immense technological demand of QD, taking into account the combined impact of anharmonicity and noise. [ABSTRACT FROM AUTHOR]

Current study focuses on realizing the role of Gaussian white noise (GWN) and external sinusoidal polychromatic radiation field (PRF) on the time‐average excitation rate (TAER) of impurity doped quantum dot (QD). The PRF induces the transfer of electronic population from the ground state to the excited states in course of time‐evolution. The PRF has been envisaged to be composed of four component fields that maintain either a prime or a non‐prime frequency ratio. GWN couples with the system additively and multiplicatively. The study highlights the role of various physical parameters, presence of noise, mode of application of noise and the features of PRF (amplitude, phase and type of frequency ratio of the components) in shaping the TAER profiles. The TAER profiles have been found to be enriched with steady growth, steady decline, maximization (useful for obtaining large nonlinear optical response), minimization and saturation (the dynamic freezing). The study reveals promising scope of obtaining desired TAER of doped QD by judicious adjustment/regulation of several control parameters which may bear serious technological implications. [ABSTRACT FROM AUTHOR]

Present investigation rigorously explores the time‐average excitation rate (TAER) of ground‐state electronic population of GaAs quantum dot (QD) to the excited eigenstates. The QD confinement potential contains Gaussian impurity (the dopant) and Gaussian white noise (GWN). GWN can be categorized as either additive or multiplicative depending upon its way of attachment to the doped QD. The excitation occurs as soon as the noise strength begins fluctuating with time in periodic or random manner. The study highlights the coupled influence of the varying physical quantity, presence/absence of noise, the mode of attachment of noise to QD, and the nature of time‐fluctuation of the noise strength (periodic/random), and finally harnesses and tailors the features of the TAER profiles. The TAER plots unveil steady rise, steady fall, maximization (linked with the emergence of large nonlinear optical response), minimization, and saturation (linked with dynamic freezing). The findings appear to be significant in the practical usage of QD‐based devices. [ABSTRACT FROM AUTHOR]

Present study rigorously scrutinizes the magnetocaloric effect (MCE) of G a A s quantum dot (QD) under the simultaneous influence of anharmonicity and Gaussian white noise (GWHN). The parity of the anharmonic potential, the route of introduction of GWHN and the QD confinement interplay delicately to fine-tune the MCE. Anharmonicity of odd (even) parity diminishes (augments) the confinement of the system with respect to the anharmonicity-free state. Generally, multiplicative noise brings in larger deviation of MCE (from the noise-free state) than additive noise. Additionally, additive (multiplicative) noise depletes (enhances) the magnitude of MCE in comparison with the noise-free values. • Magnetocaloric effect (MCE) of GaAs quantum dot (QD) is studied under the influence of Gaussian white noise (GWHN). • The QD contains anharmonicity of odd and even parities. • GWHN is applied additively and multiplicatively. • Role of noise-anharmonicity interplay on the MCE has been explored. • The mode of application of GWHN and the parity of anharmonic potential modulate the MCE. [ABSTRACT FROM AUTHOR]

Current study strives to realizing the role of Gaussian white noise (GWN) and external pulsed field (PF) on the time-average excitation rate (TAER) of impurity doped quantum dot (QD). The PF is characterized by a pulse shape function which may be continuous or discontinuous with time. In the present study we invoke sinusoidal and triangular shape functions as continuous ones and regular telegraphic and random telegraphic shape functions as discontinuous ones. GWN links with the system additively and multiplicatively. The study emphasizes on analyzing the role of various physical parameters, application of noise, pathway of application of noise and the attributes of the PF (amplitude, phase, shape and the number of pulses) in designing the TAER profiles. The TAER profiles come out to be comprising of features like persistent rise, persistent fall, maximization (useful for attaining large nonlinear optical response), minimization and saturation (the dynamic freezing). [ABSTRACT FROM AUTHOR]