# Polar CdSe nanocrystals: Implications for electronic structure

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Using Floquet theory together with a density matrix formalism, analytic expressions are derived that describe a typical pumpâ€“probe experiment on (a) a two-level, one-photon resonant model that mimics a system with two electronic states, and (b) a two-photon resonant three-level model. The...

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Calculations of the vibrational contribution to diagonal components of static polarizabilities and hyperpolarizabilities of HF and H2O are compared with the results of perturbation theory. The calculations are based on finite difference derivatives of the vibrational energy. Effects of...

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Under the action of an electric field, a polar dielectric may occur in several stable temperature states. Transitions between these states can be induced either by temperature perturbations or by changes in the load parameter depending on the frequency and strength of the electric field. A...

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The electric field distribution in microwave cavities is commonly measured by frequency perturbation techniques. For many cavity modes which are important in accelerator applications, the standard bead-pulling technique cannot provide adequate discrimination between fields parallel and...

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Using the imaginary time method, we study the structure of the perturbation series for the hydrogen atom in electric E and magnetic H fields. It is shown that there is a â€œcriticalâ€ value of the ratio Î³=H/E at which the perturbation series for the ground state changes from having a...

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We present the optical anisotropy of a hard sphere suspension subjected to combined electric and shear fields. We model the particle structure factor as a shear induced perturbation of the anisotropic structure induced by electric field. We renormalize the nonconvergent birefringence integral to...

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Examines the use of the scanned perturbation in measuring the electric field standing wave distributions in a microwave cavity resonator. Acquisition of the reliable Helmholtz equation solutions; Application of the pin perturbation in imaging microwave electric field amplitude; Use in cavity...

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A nonperturbative QED is presented which is free of the divergences of perturbative QED. The theory comprises two equations of motion (EOM's) for a relativistic electron which are mutually coupled by gauge-invariant self-electromagnetic interaction terms calculated from Maxwell's equations. The...

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The problem of the nonlinear ac dielectric response in polyelectrolytes is carried out by considering these electrically charged systems acted on by a strong dc bias electric field superimposed on a weak ac field. An infinite set of coupled (translation-rotation) kinetic equations is derived,...