Variational Principles in Dynamics and Quantum Theory

Yourgrau, W., & Mandelstam, S. (1979). Variational Principles in Dynamics and Quantum Theory.

Type

Journal article

Intellectual base

Primary research

Year

1979

Link

no authoritative link yet

Cited from

physics

Cited by

2 citations across 2 artifacts.

Each citation links to the sentence it supports in the citing article.

Primes

• Principle of Least Action
  • clarified that the operative concept is stationarity, not minimization

    This sourceSaunders. 1968. Historical and synthetic treatment of variational principles from Maupertuis through quantum mechanics; clarifies evolution from "least action" terminology to "stationary action"; bridges classical and quantum formulations; philosophical context.

Domain-specific

• Adiabatic invariant
  • … a convenient observable transfers from The action integral of a slowly deformed periodic Hamiltonian orbit remains approximately constant. to A quantum state follows an isolated instantaneous eigenspace during sufficiently slow parameter change, preserving its occupation up to phase under the adiabatic conditions..

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