What is first order perturbation theory?
The first-order perturbation equation includes all the terms in the Schrödinger equation ˆHψ=Eψ that represent the first order approximations to ˆH,ψ and E. This equation can be obtained by truncating ˆH,ψ and E after the first order terms.
What is homotopy perturbation method?
The homotopy analysis method (HAM) is a semi-analytical technique to solve nonlinear ordinary/partial differential equations. The capability of the HAM to naturally show convergence of the series solution is unusual in analytical and semi-analytic approaches to nonlinear partial differential equations.
What is variational iteration method?
The variational iteration method (VIM) is one of the well‐known semi‐analytical methods for solving linear and nonlinear ordinary as well as partial differential equations. The main advantage of the method lies in its flexibility and ability to solve nonlinear equations easily.
What does perturbation mean?
1 : the action of perturbing : the state of being perturbed. 2 : a disturbance of motion, course, arrangement, or state of equilibrium especially : a disturbance of the regular and usually elliptical course of motion of a celestial body that is produced by some force additional to that which causes its regular motion.
What is constant perturbation?
A constant perturbation doesn’t supply really energy to produce transitions that change the energy much, and they are suppressed. So they produce them, but they are suppressed. The other case that is of interest is the case when Ef is equal to Ei. I’m not saying that the state f is the same as the state i.
What is the second golden rule?
The “Golden Rule” of Leviticus 19:18 was quoted by Jesus of Nazareth (Matthew 7:12; see also Luke 6:31) during his Sermon on the Mount and described by him as the second great commandment. The common English phrasing is “Do unto others as you would have them do unto you”.
What does it mean to stay golden?
“Stay Gold” comes from a quote in the movie/book, The Outsiders that refers to a Robert Frost poem. In context, “stay gold” means to be true to yourself, innocent, uncorrupted, unblemished etc. “I’ve been thinking about it, and that poem, that guy that wrote it, he meant you’re gold when you’re a kid, like green.