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11.
Entropy squeezing and atomic inversion in the K-photon Jaynes–Cummings model in the presence of the Stark shift and a Kerr medium:A full nonlinear approach
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The interaction between a two-level atom and a single-mode field in the k-photon Jaynes–Cummings model(JCM) in the presence of the Stark shift and a Kerr medium is studied. All terms in the Hamiltonian, such as the single-mode field, its interaction with the atom, the contribution of the Stark shift and the Kerr medium effects are considered to be f-deformed.In particular, the effect of the initial state of the radiation field on the dynamical evolution of some physical properties such as atomic inversion and entropy squeezing are investigated by considering different initial field states(coherent, squeezed and thermal states). 相似文献
12.
Ehsan Ghonchepour Mohammad Reza Islami Behjat Bananezhad Hamid Mostafavi Ahmad Momeni Tikdari 《Comptes Rendus Chimie》2019,22(1):84-95
Clays are nontoxic, inexpensive, abundant, and have great potential as catalytic carriers because of their special structure, surface, and suitability for supporting transition metals. In this study, sepiolite was used as a ligand for the heterogenization of palladium chloride on Fe3O4 nanoparticle surface as a novel, high temperature stable, and recoverable green catalyst (Fe3O4@sepiolite-Pd2+). The catalytic activity of this system was tested in the reduction of nitroarene compounds and the Suzuki cross-coupling reaction. The catalyst structure was characterized using spectroscopic data and magnetic and thermal techniques such as Fourier transform infrared, scanning electron microscopy, energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction, vibrating sample magnetometer (VSM), and thermogravimetric analysis. 相似文献
13.
Pouramiri Behjat Far Reza Ghahramani Zahedifar Mahboobeh 《Chemistry of Heterocyclic Compounds》2018,54(11):1056-1060
Chemistry of Heterocyclic Compounds - A series of novel pyrazolo[1,2-b]phthalazine-2-carboxylate derivatives has been synthesized via one-pot four-component reaction of aromatic aldehyde, ethyl or... 相似文献
14.
Gholam Hossein Rounaghi Behjat Deiminiat 《Journal of inclusion phenomena and macrocyclic chemistry》2012,72(1-2):113-119
The complexation reaction between Y3+ cation with N-phenylaza-15-crown-5(Ph-N15C5) was studied at different temperatures in acetonitrile–methanol (AN/MeOH), acetonitrile–propanol (AN/PrOH), acetonitrile–1,2 dichloroethane (AN/DCE) and acetonitrile–water (AN/H2O) binary mixtures using the conductometric method. The results show that in all cases, the stoichiometry of the complex is 1:1 (ML). The values of formation constant of the complex which were determined using conductometric data, show that the stability of (Ph-N15C5.Y)3+ complex in pure solvents at 25?°C changes in the following order: PrOH?>?AN?>?MeOH and in the case of binary mixed solutions at 25?°C it follows the order: AN–DCE?>?AN–PrOH?>?AN–MeOH?>?AN–H2O. The values of standard thermodynamic quantities (?H c ° and ?S c ° ) for formation of (Ph-N15C5.Y)3+ complex were obtained from temperature dependence of the formation constant using the van’t Hoff plots. The results show that in most cases, the complex is entropy and enthalpy stabilized and these parameters are influenced by the nature and composition of the mixed solvents. In most cases, a non-linear behavior was observed for variation of log Kf of the complex versus the composition of the binary mixed solvents. In all cases, an enthalpy–entropy compensation effect was observed for formation of (Ph-N15C5.Y)3+ complex in the binary mixed solvents. 相似文献
15.
Kaveh Silakhori Mitra Refahizadeh Abbas Behjat Hamed Ghasemi Mohammad Talebi 《Journal of Applied Spectroscopy》2012,79(2):219-223
A new noncontact method for detecting optogalvanic signals in DC discharge CO2 lasers is reported. The presented technique is based on the detection of potential difference variations through a capacitor
comprised of a discharge plasma column and a coaxial or parallel conductor. The obtained optogalvanic signals exhibit better
responsivity and pulse shape in comparison with other conventional techniques; in addition, they are detectable as far as
3 m from a signal source. 相似文献
16.
A study of the optical properties and adhesion of zinc sulfide anti-reflection thin film coated on a germanium substrate 总被引:1,自引:0,他引:1
S.A.R. FiroozifarA. Behjat E. KadivarS.M.B. Ghorashi M. Borhani Zarandi 《Applied Surface Science》2011,258(2):818-821
To conduct this study, zinc sulfide (ZnS) thin films deposited on germanium (Ge) substrates were prepared by an evaporation method. The effects of deposition rate and annealing on the optical properties and adhesion of the ZnS thin films were investigated. The transmission intensity and the X-ray diffraction (XRD) pattern of the samples showed that the transmittance of the samples decreases by increasing the evaporation rates. However, with the increase of the annealing temperature, crystallinity of the thin films improves which, in turn, results in the enhancement of the transmission intensity in a far infrared region. The maximum grain size was obtained at the annealing temperature of 225 °C. Our experimental results also show that evaporation rate and annealing influences the adhesion of ZnS thin films to Ge substrates. 相似文献
17.
Davood?FathiEmail author Behjat?Forouzandeh Reza?Sarvari 《Applied Physics A: Materials Science & Processing》2011,102(1):231-238
A new method for the analysis of electron transmission property in single-walled carbon nanotubes (SWCNTs) using Green’s function
is presented in this paper for the first time. Using the proposed method, a new relation for the transmission function through
a deformed SWCNT is obtained, which depends on the energy variations and the coupling matrices related to the mechanical deformations
applied to the structure of CNT. The obtained new relation is explained by the presented results in the literature. 相似文献
18.
Manavi Mohammad Amin Fathian Nasab Mohammad Hosein Dashti Fatemeh Moghimi Setareh Saniee Parastoo Pouramiri Behjat Foroumadi Alireza Pirali-Hamedani Morteza 《Research on Chemical Intermediates》2022,48(10):4049-4062
Research on Chemical Intermediates - Nearly half of the world's population have been infected with Helicobacter pylori (H. pylori) which is known as the main cause of chronic gastritis,... 相似文献
19.
We propose a novel diffractive element to produce a perfect vortex beam. Flexibility in creating any perfect vortex beam is one of the considerable advantages of this method. Moreover, simplicity in creating the element is another interesting feature of this technique. We simply produce the proposed element by shifting the phase of a spiral zone plate and demonstrate how the phase shift enables us to manage the size of the generated perfect vortex. Further studies illustrate that the shape of the vortex is preserved in a long focal depth, while the phase map rotates around the propagation axis. In addition, all experimental results denote congruence with the respective results from simulation. 相似文献
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