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) - 13:30, 3 October 2024
Mode volume (section In electromagnetic cavities)
valid. Electromagnetic resonator Purcell effect Cavity quantum electrodynamics Cavity perturbation theory Quantum optics Equilibrium mode distribution Mode...
8 KB (1,002 words) - 16:31, 19 February 2025
the local density of electromagnetic states, Purcell effect, cavity perturbation theory, strong interaction with quantum emitters, superradiance. In computational...
6 KB (835 words) - 08:23, 21 March 2025
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 (6,140 words) - 09:51, 13 May 2025
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...
25 KB (3,037 words) - 21:59, 24 April 2025
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 (1,392 words) - 12:44, 10 January 2025
problem by considering the work conducted by Keith Brueckner on perturbation theory. Working with Jeffrey Goldstone, he produced a solution for the case...
71 KB (8,057 words) - 10:41, 11 May 2025
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) - 21:29, 5 February 2025
different future paths or trajectories. Thus, an arbitrarily small change or perturbation of the current trajectory may lead to significantly different future...
115 KB (13,052 words) - 03:20, 7 May 2025
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
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 (18,054 words) - 11:41, 11 May 2025
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) - 11:49, 8 April 2025
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 (2,737 words) - 05:51, 24 October 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
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...
140 KB (14,707 words) - 09:33, 19 April 2025
(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
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) - 22:22, 14 April 2025
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 (6,702 words) - 22:55, 19 May 2025
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...
75 KB (10,263 words) - 22:53, 13 April 2025
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...
103 KB (11,278 words) - 03:09, 14 May 2025
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...
208 KB (26,815 words) - 15:00, 9 May 2025
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 (20,866 words) - 11:29, 20 April 2025
fields and vibrational energies. MOLCAS also contains second order perturbation theory codes CASPT2 and RASPT2. MOLCAS code has been created at the late...
8 KB (785 words) - 20:52, 22 July 2024
Lasing threshold (section Theory)
the losses experienced by light in one round trip of the laser's optical cavity. This can be expressed, assuming steady-state operation, as R 1 R 2 exp...
6 KB (1,004 words) - 22:22, 4 January 2023
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) - 00:13, 24 September 2024
Quantum scar (category Quantum chaos theory)
has undergone its renaissance period, sparked by the discoveries of perturbation-induced scars and many-body scars that have subsequently paved the way...
41 KB (4,555 words) - 15:16, 22 May 2025
states"; additionally, a similar kind of scene has been suggested with perturbation-induced scarring in disordered quantum dots (see scars). However, the...
14 KB (1,708 words) - 09:22, 20 May 2025
(December 22, 1900 – July 25, 1976) was an American physicist who advanced the theory of the electronic structure of atoms, molecules and solids. He also made...
68 KB (8,042 words) - 13:47, 30 March 2025
nonlinear lattice with improved integrability using Lie transform perturbation theory". Physical Review E. 69 (5): 056501. Bibcode:2004PhRvE..69e6501S...
28 KB (3,407 words) - 13:15, 11 February 2025
{dq}{dt}},} where q is the perturbation variable (electric or magnetic field, molecular bond-length, or any other perturbation to the system), and E 1 {\displaystyle...
22 KB (2,844 words) - 09:40, 2 July 2024