and electronics, cavity perturbation theory describes methods for derivation of perturbation formulae for performance changes of a cavity resonator. These...
16 KB (1,932 words) - 03:16, 31 July 2024
Julian Schwinger (redirect from Source theory)
(QED), in particular for developing a relativistically invariant perturbation theory, and for renormalizing QED to one loop order. Schwinger was a physics...
24 KB (2,987 words) - 06:18, 23 June 2024
the local density of electromagnetic states, Purcell effect, cavity perturbation theory, strong interaction with quantum emitters, superradiance. In computational...
6 KB (835 words) - 08:22, 22 June 2024
Schumann resonances (redirect from Earth-ionosphere cavity resonance)
slightly owing to solar-induced perturbations to the ionosphere (which compress the upper wall of the closed cavity)[citation needed] amongst other factors...
55 KB (6,095 words) - 23:14, 12 August 2024
Dielectric resonator (section Theory of operation)
encapsulating the cavity can drastically impact the performance of the resonant circuit. This phenomenon can be explained using cavity perturbation theory. If a resonator...
10 KB (1,393 words) - 10:38, 26 June 2024
problem by considering the work conducted by Keith Brueckner on perturbation theory. Working with Jeffrey Goldstone, he produced a solution for the case...
66 KB (7,549 words) - 10:46, 19 July 2024
different future paths or trajectories. Thus, an arbitrarily small change or perturbation of the current trajectory may lead to significantly different future...
123 KB (14,054 words) - 22:18, 15 August 2024
Coupled mode theory (CMT) is a perturbational approach for analyzing the coupling of vibrational systems (mechanical, optical, electrical, etc.) in space...
6 KB (782 words) - 00:55, 22 January 2024
EmDrive (redirect from Microwave resonant cavity thruster)
electro-magnetic theory behind a microwave resonant cavity thruster. A demonstration version of the drive was built and tested with different cavity shapes and...
74 KB (7,224 words) - 01:47, 11 May 2024
Random generalized Lotka–Volterra model (category Complex systems theory)
from the UFP to MA phase is signaled by the cavity solution becoming unstable to disordered perturbations. When σ K = 0 {\displaystyle \sigma _{K}=0}...
15 KB (2,056 words) - 20:44, 25 March 2024
Speed of light (section Cavity resonance)
wavelength of the modes was known from the geometry of the cavity and from electromagnetic theory, knowledge of the associated frequencies enabled a calculation...
145 KB (15,359 words) - 18:03, 8 August 2024
Atomic electron transition (section Theory)
stimulated transition rate can be calculated using time-dependent perturbation theory; however, the result can be summarized using Fermi's golden rule:...
8 KB (868 words) - 14:59, 25 June 2024
Planck's law (category Old quantum theory)
time dependent perturbation theory in quantum mechanics. Calculation of A also requires second quantization since semi-classical theory cannot explain...
141 KB (18,060 words) - 01:42, 9 June 2024
Quantum electrodynamics (category Quantum field theory)
revealed that such computations were reliable only at a first order of perturbation theory, a problem already pointed out by Robert Oppenheimer. At higher orders...
50 KB (6,635 words) - 18:13, 1 July 2024
Physics of whistles (section Shallow-cavity tone)
the cavity (the flow in the cavity being subsonic). Small symmetric disturbances in the jet stream are amplified as they proceed toward the cavity (similar...
81 KB (12,475 words) - 03:53, 19 June 2024
revealed that such computations were reliable only at a first order of perturbation theory, a problem already pointed out by Robert Oppenheimer. At higher orders...
163 KB (20,960 words) - 22:48, 15 August 2024
(HF), Post-HF and density functional theory (DFT)) the implicit solvent models represent the solvent as a perturbation to the solute Hamiltonian. In general...
32 KB (4,370 words) - 18:27, 17 February 2024
Quantum ergodicity (category Chaos theory)
former quantum interference is important. On the other hand, in the perturbation-induced quantum scarring, some of the high-energy eigenstates of a locally...
11 KB (1,173 words) - 08:50, 31 May 2024
to the formation of small vapor-filled cavities in the liquid. When subjected to higher pressure, these cavities, called "bubbles" or "voids", collapse...
76 KB (9,399 words) - 19:25, 17 August 2024
surface of the cavity, which would cause mechanical perturbations. An antenna is needed in the setup to couple RF power to the cavity fields and, in turn...
40 KB (5,638 words) - 07:21, 19 May 2024
Photon (section Quantum field theory)
photons, must obey Bose–Einstein statistics. Dirac's second-order perturbation theory can involve virtual photons, transient intermediate states of the...
107 KB (11,683 words) - 10:54, 17 August 2024
equilibrium) if it is capable of returning to its equilibrium state after a perturbation (a capacity known as resilience) or does not experience unexpected large...
22 KB (2,734 words) - 01:29, 28 April 2024
Zero-point energy (category Quantum field theory)
virtual energy potential of positive and negative energy. In quantum perturbation theory, it is sometimes said that the contribution of one-loop and multi-loop...
209 KB (26,957 words) - 20:11, 17 August 2024
167(2248), 26–30. Tulin, M. P. (1963). Supercavitating flows - small perturbation theory. Laurel, Md, Hydronautics Inc. Niam J W (Dec 2014), Numerical Simulation...
16 KB (1,645 words) - 22:10, 21 February 2024
using these formulas. Solar radiation pressure is a source of orbital perturbations. It significantly affects the orbits and trajectories of small bodies...
40 KB (5,289 words) - 15:21, 14 July 2024
Quantum scar (category Quantum chaos theory)
has undergone its renaissance period, sparked by the discoveries of perturbation-induced scars and many-body scars (see below). The existence of scarred...
36 KB (4,027 words) - 15:48, 7 July 2024
Soliton (redirect from Soliton theory)
tip on a fixed region. The soliton propagation carries the mechanical perturbation with little loss in energy across the material, which enables domain...
42 KB (4,540 words) - 10:52, 17 July 2024
anaesthetic effect is exerted through some perturbation of the lipid bilayer. Several types of bilayer perturbations were proposed to cause anaesthetic effect...
63 KB (6,813 words) - 16:12, 15 August 2024
Gauge fixing (category Quantum field theory)
not used in covariant perturbation theory, which has become standard for the treatment of relativistic quantum field theories such as quantum electrodynamics...
28 KB (4,271 words) - 21:58, 2 May 2024
modification to a problem that can be solved exactly, a method known as perturbation theory. One simple way to compare classical to quantum mechanics is to consider...
74 KB (10,232 words) - 09:07, 10 August 2024