In physics, slowly varying envelope approximation (SVEA, sometimes also called slowly varying asymmetric approximation or SVAA) is the assumption that...

Perturbation methods Quantum tunneling Slowly varying envelope approximation Supersymmetric WKB approximation Hall 2013 Section 15.1 Dingle, Robert Balson...

variable z. The original BPM and PE were derived from the slowly varying envelope approximation and they are the so-called paraxial one-way models. Since...

figure illustrates a modulated sine wave varying between an upper envelope and a lower envelope. The envelope function may be a function of time, space...

asteroid Svea 123, a model of liquid-fuel stoves SVEA (slowly varying envelope approximation), a method in optics to solve the electromagnetic wave equation...

beam propagation method, which is only valid under the slowly varying envelope approximation, eigenmode expansion provides a rigorous solution to Maxwell's...

their propagation since the early years of laser era. The Slowly varying envelope approximation of MBE follows from the standard nonlinear wave equation...

equation at 2ω (assuming negligible loss and asserting the slowly varying envelope approximation) is ∂ E ( 2 ω ) ∂ z = − i ω n 2 ω c d eff E 2 ( ω ) e i...

pulse. To partially reiterate the discussion above, the slowly varying envelope approximation (SVEA) of the electric field of a wave with central wave...

the slowly varying envelope approximation, means that the amplitude or envelope of a wave A ( r ) {\displaystyle A(\mathbf {r} )} is slowly varying compared...

rapidly varying second factor that depends upon the number of slits and their spacing. In the figure I1 has been set to unity, a very rough approximation. The...

transforms of the waveform, via integration of higher-order slowly varying envelope approximations, by a split-step method (which can use the exact dispersion...

wave motion and the mean motion – assuming the envelope dynamics of the carrier waves is slowly varying. Phase averaging of the Lagrangian results in an...

gravitational potential is negligible (the Cowling approximation) and that the star's structure varies more slowly with radius than the oscillation mode, the...

the equation and make some calculations. If we assume the slowly varying envelope approximation: | ∂ 2 a ~ ∂ z 2 | ≪ | β 0 ∂ a ~ ∂ z | {\displaystyle \left|{\frac...

representations of locally varying variability, where the variability might be modelled as being driven by a separate time-varying process, as in a doubly...

Exploration 2 Slope efficiency Slosh dynamics Slow-motion approximation Slow light Slowly varying envelope approximation Small-angle X-ray scattering Small-angle...

such as "Letter" and "Legal" are used. The international standard for envelopes is the C series of ISO 269. The international paper size standard is ISO...

scaling) is a smooth approximation of the ramp function, just as the logistic function (with scaling) is a smooth approximation of the Heaviside step...

luminosity. Even these refinements are only an approximation, however, and the mass-luminosity relation can vary depending on a star's composition. When a...

only an approximation as the forward characteristic is gradual in its current–voltage curve. Since a diode's forward-direction voltage drop varies only a...

of very high electrical current when the lamp is triggered. The glass envelope is most commonly a thin tube, often made of fused quartz, borosilicate...

magnitude is changing slowly due to seasonal effects as the planet moves along its 165-year orbit around the Sun, and the approximation above is only valid...

an approximation method such as the stationary phase approximation, or to use numerical methods. Often (as in radar applications) a(t) is a slowly varying...

of the Sun (M☉). It is surrounded by a complex asymmetric circumstellar envelope (CSE) caused by its mass loss. It produces strong molecular maser emission...

indicates a lower rate of energy loss and the oscillations die out more slowly. A pendulum suspended from a high-quality bearing, oscillating in air, has...

semiconductor and ϕ n ( z ) {\displaystyle \phi _{n}(z)} is a slowly varying envelope function for the system. If the quantum well is very deep, it can...

and the differentially-rotating convective envelope; a convective envelope in which the rotation rate varies both with depth and latitude; and a final...

are congruent and similarly oriented, so that their envelope W′ may be considered as the envelope of a single secondary wavefront which preserves its...

the drive's sensor, the holes in the correctly inserted floppy's plastic envelope and a single hole in the rotating floppy disk medium line up. This mechanism...