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Publications Influence

The many-body problem in quantum mechanics

- N. March, W. H. Young, S. Sampanthar, D. H. Kobe
- Physics
- 1 July 1968

486 10

Derivation of the Boltzmann principle

- M. Campisi, D. H. Kobe
- Physics
- 11 November 2009

We derive the Boltzmann principle SB=kB ln W based on classical mechanical models of thermodynamics. The argument is based on the heat theorem and can be traced back to the second half of the 19th… Expand

38 3- PDF

Gauge transformations and the electric dipole approximation

- D. H. Kobe
- Physics
- 1 February 1982

Some subtle aspects of the electric dipole approximation (EDA) are discussed, and some persistent criticisms answered. The usual form of the EDA is that the scalar potential is −E⋅r and the vector… Expand

38 2

Canonical transformation to energy and ‘‘tempus’’ in classical mechanics

- D. H. Kobe
- Physics
- 1 November 1993

In classical Hamiltonian dynamics for a system with a single degree of freedom a canonical transformation is made to new canonical variables in which the new canonical momentum is energy and its… Expand

9 1

Gauge invariant formulation of the interaction of electromagnetic radiation and matter

- D. H. Kobe, A. L. Smirl
- Physics
- 1 June 1978

The conventional perturbation theory in quantum mechanics for the interaction of electromagnetic radiation with matter, which is based on the time‐dependent vector and scalar potentials, is shown to… Expand

84 1

Maximum-Overlap Orbitals, an Energy Variational Principle, and Perturbation Theory

- D. H. Kobe
- Physics
- 1971

10 1

Lagrangians for dissipative systems

- D. H. Kobe, G. Reali, S. Sieniutycz
- Physics
- 1 November 1986

A Lagrangian and Hamiltonian formulation can be given for a damped harmonic oscillator with damping linear in the velocity. The canonical momentum is not equal to the kinetic momentum, and the… Expand

27 1

Helmholtz theorem for antisymmetric second‐rank tensor fields and electromagnetism with magnetic monopoles

- D. H. Kobe
- Physics
- 1 April 1984

A generalized Helmholtz’s theorem is proved, which states that an antisymmetric second‐rank tensor field in 3+1 dimensional space‐time, which vanishes at spatial infinity, is determined by its… Expand

16 1

Generalized Berry phase for the most general time-dependent damped harmonic oscillator

- D. H. Kobe
- Physics
- 21 June 1991

The most general time-dependence Hamiltonian for a harmonic oscillator is both linear and quadratic in the coordinate and the canonical momentum. It describes in general a harmonic oscillator with a… Expand

14 1

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