Stationary Phase Approximation

Views Updated: Dec 15, 2025

Key Facts

Abbreviation
SPA
Pronunciation
/ˈsteɪʃəˌnɛri feɪz əˌprɑksəˈmeɪʃən/
Category
Miscellaneous
Related Field
Unclassified

Examples in Context

  1. A formula of the scattering amplitude acompanied by the emission or absorption of N photons is found by using the stationary phase approximation and frozen target model.
  2. The phase-shift formulae for preserved-amplitude wave field continuation can be obtained by stationary phase approximation for integral operation of DSR preserved-amplitude wave field continuation formulae in a condition of high-frequence hypothesis.
  3. To ensure accuracy of the result, the asymptotic expand is introduced for inner solution and carried out the stationary phase approximation.
  4. For the case of fast-sweeping fields, we derive an analytic expression for the tunneling probability with stationary phase approximation and show that the nonlinearity can dramatically influence the tunneling probability when the nonlinear " internal field " resonates with the external field.
  5. By using the complex analytic signal representation and the method of stationary phase, the propagation equation of ultrashort pulses in the far-field has been derived beyond the paraxial approximation, which allows for large angles in the far-field.

Other meanings of SPA

Solus Per Aqua Misc
Sales and Purchase Agreement Business
Single Page Application Computing
Special Projects Administration Misc
Strategic Partnership Agreement Misc
Society of Practising Accountants Business
Special Protocol Assessment Gov
Shared Port Adaptor Misc
Single Page Applications Misc
Società per Azioni Intl