Showing papers in "Physics Letters A in 1978"

TL;DR: In this article, a complete construction for all self-dual euclidean Yang-Mills fields is given, involving only linear algebra, and the construction is shown to be complete.

TL;DR: In this paper, the authors measured 1/f noise in samples with lattice and impurity scattering, and showed that lattice scattering gives 1/ε noise, while impurity scatter gives 1 ε noise.

TL;DR: In this article, it was shown that stochastic motion of the strange attractor type may arise in a system with stable limit cycle if the perturbation of the system is periodical.

TL;DR: In this article, hypervirial relations are used to yield the series for the energy and other expectation values, for a hydrogen atom with perturbation λ r, without calculation of perturbed wavefunctions.

TL;DR: In this paper, the authors proved that black holes with a conformal scalar field are unstable under monopole perturbations, and proved that the same is true for a black hole with a non-convex scalar force.

TL;DR: In this article, it was shown that if the semiclassical estimate is a bound for some moment of the negative eigenvalues (as is known in some cases in one-dimensional spaces), then the same bounds are also bounds for all higher moments.

TL;DR: In this article, Noether's theorem is used to derive the Lewis invariant for the time-dependent harmonic oscillator and the application of the method to non-linear dynamical systems is discussed.

TL;DR: In this paper, a theoretical model was proposed to explain the tokamak energy confinement time, which predicts experimentally observed values to within a level of uncertainty consistent with the intrinsic spread of the experimental data and the necessity of calculating the confinement time without precise knowledge of the temperature profile.

TL;DR: In this article, it is shown that the "difficulties" which Bransden recently associated with the variational calculation of resonance parameters are nonexistent, provided the norm of the Gamow functions is defined appropriately and consistently.

TL;DR: In this paper, the method of separation of variables can be employed to solve the appropriate scalar Gelfand-Levitan equation, which produces many new solutions (with soliton interactions) and introduces a new rational-exponential soliton.

TL;DR: In this article, angle-resolved photoelectron energy distributions have been measured for uhv cleaved GaAs crystals and structures in these spectra are ascribed to emission from surface states.

TL;DR: In this article, a theory of a new type of photocurrent in crystals without symmetry center is suggested, where the photocurrent is different from zero in the case when the light polarization does not coincide with the crystal optical axes.

TL;DR: In this paper, the early stages of a superfluorescent pulse are described with full account of both quantum and propagation effects, and an equivalent classical stochastic process is found in terms of which the later, intrinsically nonlinear part of the radiation problem can be analyzed.

TL;DR: In this article, the ballooning mode criterion is re-evaluated for a model problem representing a large-aspect-ratio tokamak with circular flux surfaces, and it is found that an instability exists if both the shear and pressure gradient tend to zero.

TL;DR: The approximation of the Fermi-Dirac integral of order 1 2 with a relative error not exceeding 0.4% for any value of the position of the fermi level was presented in this paper.

TL;DR: Tetramethylammonium tetrachlorocobaltate, {N(CH3)4}2 CoCl4, has been found to undergo successive phase transitions at about −151, −81, 3.0, 4.6, 7.1 and 20°C as discussed by the authors.

TL;DR: For a stationary, asymptotically flat space-time, the Komar energy associated with the time-like Killing vector and the ADM energy are equal when the latter is evaluated on a Cauchy surface which is asymPTotically at rest relative to the Killing vector as discussed by the authors.

TL;DR: In this paper, it is argued on the basis of a reexamination of the Landau-de Gennes theory and with reference to experimental data that the isotropic-nematic transition exhibits pretransitional fluctuations characteristics of a tricritical point.

TL;DR: Spectral and spatial distributions of radiation bands with peaks at 33, 51 and 60 A, ascribed to 4d-4f transitions of tungsten ions in the range about W XX-W XXXV, have been measured in discharges of different electron temperatures as mentioned in this paper.

TL;DR: In this article, the absolute Rayleigh cross sections in air have been measured for various pulse durations of incident laser radiation, but the classical theory was not confirmed, but was assumed to be correct.

TL;DR: In this paper, the saturation magnetization and high-field susceptibility of amorphous Fe 100− x B x (11 ⊽ x ⩽ 22) alloys have been measured at 4.2 K, 77 K and room temperature in magnetic fields up to 100 kOe.

TL;DR: In this paper, the relationship between non-linear partial differential equations which have soliton solutions and SL (2, R) has been studied, to the point where it provides a framework for discussing Backlund transformations, and equations for the inverse scattering method.

TL;DR: In this paper, a Kramers-like classical pseudopotential which includes Diffraction and Symmetry effects is worked out for k B T ⩾1 Ry. But this pseudo-product is restricted to the case where

TL;DR: The experimental 3p-spectrum of atomic Mn is shown to be in good agreement with theoretical results based on the interference between the 3p63d54s2 → 3p53d64s2 and the 3 p 6 3 d 5 4 s 2 → 3 p6 3 d 4 4 4 S 2 € f excitations mediated via the super Coster-Kronig decay as discussed by the authors.

TL;DR: In this paper, the Hume-Rothery rules are modified for predicting substitutionality in metal-stable surface alloys produced by ion implantation, and the results are shown to be in agreement with published data on 63 implanted alloys in Fe, Cu, Ni, V and Be.

TL;DR: In this article, the authors analyzed the mode of operation of a two-level parametric electromagnetic detector for gravitational wave detection, which is tunable and potentially more sensitive than the mechanical antennas currently considered.

TL;DR: In this paper, the first measurement of the absolute (e, 2e) five times differential cross section in coplanar symmetric conditions on He is reported and the incident energy is varied from 200 to 4000 eV in order to test different theoretical models.

TL;DR: When spin-polarized positive muons are stopped in fine SiO 2 powder under vacuum, muonium precession was observed indicating 45% formation as discussed by the authors, indicating that positronium emerges from the powder grains into the voids.

TL;DR: In this article, the ground state properties of a hydrogen atom with the polynomial perturbation 2 λr + λ 2 r 2 were studied using the Rayleigh-Schrodinger series.

TL;DR: In this article, rotationally symmetric solitary wave solutions to the sine-Gordon equation (ring waves) are shown to reach a maximum extension and then shrink, which is referred to as return effect.