Studying the effect of trust and quality of electronic services on customer satisfaction (case study: customers of Mellat Bank in Rasht)

The aim of this study is to investigate the impact of trust and quality of electronic services on customer satisfaction. The nature of this research regarding the purpose is applied and considering the method of data collection, it is descriptive of correlational-survey type. Study population is composed of customers of branches of Bank Mellat in Rasht whose number is unlimited. Cochran's formula was used to determine the sample size, which was estimated as 384 people and the data collection tool is questionnaire. For testing the hypotheses and analyzing structural relationships between variables, confirmatory factor analysis and structural equation modeling were used along with Spss and Amos software. The study findings show that in connection with the first hypothesis of the study, quality of electronic services has a significant positive impact on customer satisfaction in MellatBank in Rasht. In connection with the second hypothesis,  quality of electronic services through trust has a positive and meaningful impact on customer satisfaction in Mellat Bank in Rasht. About the third hypothesis, trust has a significant positive impact on customer satisfaction in Mellat Bank in Rasht. Results showed the verification of the primary and secondary purposes. Keywords: Electronic service quality, Customer satisfaction, Trus

Half-optical-cycle damped solitons in quadratic nonlinear media

In this paper, Using a classical model of the radiation-matter interaction, we show that the propagation of (1 + 1) dimensional few-optical-cycle pulses in quadratic nonlinear media, taking moderate absorption into account, can be described by the Korteweg–de Vries-Burgers’ (KdVB) equation without using the slowly varying envelope approximation. To fulfill this purpose we use the reductive perturbation method and consider the long-wave approximation, assuming that the characteristic frequency of the pulse is much lower than the resonance frequency of the atoms. We also study both analytical and numerical solution of the KdVB equation describing damped few-optical-cycle soliton propagation

Chaos Near to the Critical Point: Butterfly Effect and Pole-Skipping

We study the butterfly effect and pole-skipping phenomenon for the 1RCBH model which enjoys a critical point in its phase diagram. Using the holographic idea, we compute the butterfly velocity and interestingly find that this velocity can probe the critical behavior of this model. We calculate the dynamical exponent of this quantity near the critical point and find a perfect agreement with the value of the other quantity's dynamical exponent near this critical point. We also find that at chaos point, the phenomenon of pole-skipping appears which is a sign of a multivalued retarded correlation function. We briefly address the butterfly velocity and pole-skipping for the AdS-RN black hole solution which on its boundary a strongly coupled charged field theory lives. For both of these models, we find $v_B^2\geq c_s^2$ at each point of parameter space where $c_s$ is the speed of sound wave propagation.Comment: 27 pages, 1 figuer

Holographic Entanglement of Purification near a Critical Point

In the presence of finite chemical potential $\mu$, we holographically compute the entanglement of purification in a $2+1$- and $3+1$-dimensional field theory and also in a $3+1$-dimensional field theory with a critical point. We observe that compared to $2+1$- and $3+1$-dimensional field theories, the behavior of entanglement of purification near critical point is different and it is not a monotonic function of $\frac{\mu}{T}$ where $T$ is the temperature of the field theory. Therefore, the entanglement of purification distinguishes the critical point in the field theory. We also discuss the dependence of the holographic entanglement of purification on the various parameters of the theories. Moreover, the critical exponent is calculated.Comment: 10 pages, 10 figure