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- W2105721771 abstract "For a classical Hamiltonian H=(1/2) p2+V(q,t) with an arbitrary time-dependent potential V(q,t), exact invariants that can be expressed as series in positive powers of p, I(q,p,t)=∑∞n=0pnfn(q,t), are examined. The method is based on direct use of the equation dI/dt=∂I/∂t +[I,H] =0. A recursion relation for the coefficients fn(q,t) is obtained. All potentials that admit an invariant quadratic in p are found and, for those potentials, all invariants quadratic in p are determined. The feasibility of extending the analysis to find invariants that are polynomials in p of higher degree than quadratic is discussed. The systems for which invariants quadratic in p have been found are transformed to autonomous systems by a canonical transformation." @default.
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- W2105721771 date "1982-12-01" @default.
- W2105721771 modified "2023-09-23" @default.
- W2105721771 title "A direct approach to finding exact invariants for one-dimensional time-dependent classical Hamiltonians" @default.
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- W2105721771 doi "https://doi.org/10.1063/1.525329" @default.
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