Abstract The Coulomb barrier is a classic introductory physics concept and one that key to understanding nuclear fusion. Yet the idea fusing nuclei within single system could exhibit both far-range repulsion short-range attraction can result in significant cognitive dissonance students. There are no classical examples of this behaviour commercially available demonstration kits. magnetic ‘Coulom...

We propose a new approach toward excitons in carbon nanotubes whereby the matrix elements of the electronhole Coulomb interaction are expanded into a series over the nanotube’s one-dimensional reciprocal lattice vectors. We show that only a few terms of this expansion give a nonvanishing contribution to the Coulomb matrix elements. The proposed approach allows one to single out Fourier componen...

Artificial crystal lattices can be used to tune repulsive Coulomb interactions between electrons. We trapped electrons, confined as a two-dimensional gas in a gallium arsenide quantum well, in a nanofabricated lattice with honeycomb geometry. We probed the excitation spectrum in a magnetic field, identifying collective modes that emerged from the Coulomb interaction in the artificial lattice, a...

We test the influence of the Coulomb interaction on the thermodynamic and cluster generation properties of a system of classical particles described by different lattice models. Numerical simulations show that the Coulomb interaction produces essentially a shift in temperature of quantities like the specific heat but not qualitative changes. We also consider a cellular model. The thermodynamic ...

The effect of multi-particle Coulomb final state interactions on higher-order intensity correlations is determined in general, based on a scattering wave function which is solution of the n-body Coulomb Schrödinger equation in (a large part of) the asymptotic region of n-body configuration space. In particular, we study Coulomb effects on the n-particle Bose-Einstein correlation functions of si...

We study gauge dependence of the recently suggested definition of the singlet and adjoint potentials in SU(2) lattice gauge theory. We find that in the (time local) maximal tree axial gauge the singlet potential obtained from the gauge dependent correlator TrL(x)L(y) differs from that computed in the Coulomb gauge. In the generalized Coulomb gauge we find the range of the parameter values in wh...

We study the heavy charge potential in the Coulomb phase of pure gauge compact U(1) theory on the lattice. We calculate the static potential VW (T, ~ R) from Wilson loops on a 16 × 32 lattice and compare with the predictions of lattice perturbation theory. We investigate finite size effects and, in particular, the importance of non–Coulomb contributions to the potential. We also comment on the ...

We investigate the spectrum of the Faddeev-Popov operator in Coulomb gauge QCD using quenched SU(3) lattice simulation. In the confinement phase, we observe the accumulation of the near-zero modes of the FP operator at large lattice volumes, and the color-Coulomb self-energy diverges in the infrared limit. Moreover, even in the deconfinement phase, the behavior of the FP eigenvalue density is q...