• 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
  • 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
  • Thumbnail for Schumann resonances
    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
  • Thumbnail for Julian Schwinger
    (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
  • 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
  • Thumbnail for Hans Bethe
    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
  • Thumbnail for Atomic electron transition
    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
  • Thumbnail for Chaos theory
    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
  • Thumbnail for Planck's law
    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
  • Thumbnail for Quantum ergodicity
    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
  • Thumbnail for Ecological stability
    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
  • Thumbnail for Superconducting radio frequency
    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
  • Thumbnail for Speed of light
    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
  • Thumbnail for Random generalized Lotka–Volterra model
    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
  • Thumbnail for Quantum electrodynamics
    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
  • 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
  • Thumbnail for Zero-point energy
    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
  • Thumbnail for History of electromagnetic 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...
    163 KB (20,866 words) - 11:29, 20 April 2025
  • Thumbnail for MOLCAS
    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
  • 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
  • Thumbnail for Gauge fixing
    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
  • Thumbnail for Quantum scar
    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
  • Thumbnail for John C. Slater
    (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
  • Thumbnail for Landau–Zener formula
    {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