Showing papers in "Annals of Physics in 1963"

TL;DR: In this paper, a formalism has been developed, using Feynman's space-time formulation of nonrelativistic quantum mechanics whereby the behavior of a system of interest, which is coupled to other external quantum systems, may be calculated in terms of its own variables only.

TL;DR: In this paper, the response of a system to an external disturbance can always be expressed in terms of time dependent correlation functions of the undisturbed system, and the complicated structure the correlation functions must have in order that these descriptions coincide.

TL;DR: A quantitative description of the statistical fluctuations in the region of overlapping resonances of nuclear cross sections is given in this article, where general nuclear reaction theory is used in order to systematically obtain a separation of direct interactions and compound nuclear contributions.

TL;DR: In this paper, the authors considered the high temperature regime (T > Tt) where polaron motion is predominantly by means of random jumps between neighboring sites, and the results of this treatment agree with those of the occurrence-probability approach in the classical limit (T ⪢ ΘDe bye).

TL;DR: In this paper, the electrodynamic interaction is considered as originating from a short range interaction between currents instead of the long-range starting point of quantum electrodynamics and the long range character of the effective interaction is obtained from the short range by setting the ambiguous quadratically divergent integral for the photon mass equal to 1 instead of zero.

TL;DR: The results of electronic computer studies of equilibrium configurations of an idealized charged drop are presented in this paper, where the symmetric saddle-point shapes have been traced as a function of the fissionability parameter x.

TL;DR: In this paper, a phenomenological model is presented which is capable of describing the average entrance channel phenomena of neutral and charged particles strongly interacting with complex nuclei, based on rather general assumptions on the asymptotic properties of the scattered wave function.

TL;DR: In this paper, the authors derived equations that relate, to first order in e2, the neutron proton mass difference to information directly obtainable from electron scattering experiments under two principal assumptions.

TL;DR: In this article, the limit of an infinite system is investigated for the correlation functions of a classical system of particles with two-body central interaction, which imply the existence of a gas phase and the convergence of the virial expansion.

TL;DR: Geometrostatics as mentioned in this paper has been used to construct the initial values for a time-symmetric solution of the empty space Einstein equations having the topology of arbitrary number of Einstein-Rosen "bridges".

TL;DR: In this paper, the role of electromagnetic phenomena and the presence of a charge in such a field is analyzed in detail, and a detailed study of the static homogeneous gravitational field which precedes the discussion of the equivalence principle is discussed.

TL;DR: In this article, the authors employed the projection operator-equivalent potential method for the study of neutron widths and the neutron strength function, and the resulting fit is excellent providing a description not only of the deviations of the strength function from the optical model result but also of the fluctuations in the strength functions as the target nucleus is changed.

TL;DR: In this article, the Lienard-Wiechert potentials were replaced with the Lorentz-Abraham force law for the two-body problem of classical electrodynamics.

TL;DR: In the second part of this paper, we complete the program set forth in the first part (1) and discuss the superkinetic expansions of the Liouville equation as mentioned in this paper.

TL;DR: In this paper, a review of customary theories of the measurement process exposes certain conceptual and empirical difficulties, which arise in connection with the uncertainty principle, the projection postulate in its usual understanding, and in an attempt to formulate joint probabilities for noncommuting observables.

TL;DR: In this article, a systematic theoretical treatment of interference phenomena of the neutral K mesons is presented for the extreme case that CPT, CP, and T invariance are all violated.

TL;DR: In this article, the probability distribution of the number of neutrons and delayed neutron precursors in a multiplying assembly is considered, and the problem is solved by the method of characteristics and general properties of the characteristic curves and the solution is discussed.

TL;DR: In this paper, it is shown that isothermals with positive slope can occur in the Hartree-Fock equation of state only if an unstable solution has been used.

TL;DR: The main points in the formalism involving a flat-space metric tensor γμν together with the Riemannian metric tensors gμν are summarized and discussed in this paper.

TL;DR: In this article, the cross section σ ( q, ω ) for scattering of electrons through momentum transfer q and energy loss ω from heavy nuclei is derived, which is related to the four-dimensional Fourier transform of the nuclear time-dependent pair correlation function.

TL;DR: In this paper, the boundary conditions for Machian solutions are stated in a coordinate system in which the cosmological background is described by a conformally flat metric, and the metric tensor g μν is then written as a product of the scalar density ϕ 2 and a tensor density γ μν with unit determinant.

TL;DR: In this paper, an approximate first integral of the equations of motion of a charged particle in a static magnetic field is constructed, analogous to the Stormer integral, but it is not required that the field have axial symmetry in order for the integral to be exact.

TL;DR: In this article, it was shown that a mixture of dilute hard-sphere Bose gases of different particle mass phase separate at zero temperature for short range repulsive irteractions for which no phase separation occurs.

TL;DR: In this article, a new derivation of a Boltzmann collision integral with a dynamically screened Coulomb interaction is presented, and correlation functions referring to equal and different times and formulas for the density-density autocorrelation function in a quantum-mechanical plasma are given.

TL;DR: In this article, a critical discussion of some of the suggestions which have been put forward for measuring the nuclear momentum distribution F(p) and pair correlation function C(r1r2) is presented.

TL;DR: In this article, it was shown that the energy of a simple pendulum when the suspending thread is gradually shortened is at most O(n) for every n −1 for the equation x + 2 x = O, with natural conditions governing its slow change.

TL;DR: In this paper, a consistent approximation procedure was developed for the analytical treatment of elastic scattering of neutral and charged particles by complex nuclei in the presence of strong absorption, which is used in this paper.

TL;DR: The assignment of spins to a number of levels in even-even nuclei from O/ sup 16/ to Ca/sup 40/ by the measurement of gamma ray angular correlations following the excitation of the levels by inelastic scattering of protons is described in this paper.

TL;DR: The statistical thermodynamics of equilibrium (STE) as discussed by the authors is a generalization of entropy, information, and uncertainty that is valid only for the fluctuations of coupled systems that have reached their equilibrium.