Background: Response to spin-dependent operators has been investigated in the magnetic dipole and Gamow-Teller transitions, which provides properties of a nuclear system. Purpose: I investigate an isotopic dependence collectivity generated by interactions Ca Ni isotopes through isovector (IV) spin-flip excitations. The responses neutral $(t_z)$ charge-exchange $(t_{\pm})$ channels are considere...

We identify exact excitation content of the intermediate states for the oneparticle Green’s functions, spin-spin and (charge) density-density correlation functions of the periodic one-dimensional t-J model with inverse square exchange. The excitations consist of neutral S = 1/2 spinons and spinless (charge −e) holons with semionic fractional statistics, and bosonic (charge +2e) “anti-holons” wh...

Neutrinos are awesome: of all elementary particles, only neutrinos (not even quarks!) have their own conferences, this year Neutrino-98, on a par with Susy, Strings, Lattices, and the like. It is sobering to remind ourselves that all weak interaction experiments start out wrong, even when performed by the greatest experimentalists of their times. In 1911-1912, using a magnetic spectrometer and ...

Majorana fermions, originally proposed as elementary particles acting as their own antiparticles, can be realized in condensed-matter systems as emergent quasiparticles, a situation often accompanied by topological order. Here we propose a physical system which realizes Landau levels-highly degenerate single-particle states usually resulting from an orbital magnetic field acting on charged part...

Two consecutive measurements of the position of a non relativistic free particle will give entirely unrelated results. Recent quantum information research by G. Svetlichny, J. Tolar, and G. Chadzitaskos have explained this property of position observables as a result of a path in the Feynman integral being mathematically defined as a product of incompatible states; that is, as a product of mutu...

We present a simple method to derive the semiclassical equations of motion for a spinning particle in a gravitational field. We investigate the cases of classical, rotating particles, i.e. the so-called pole-dipole particles, as well as particles with an additional intrinsic spin. We show that, starting with a simple Lagrangian, one can derive equations for the spin evolution and momentum propa...

Artificial spin ice systems, namely lattices of interacting single domain ferromagnetic islands, have been used to date as microscopic models of frustration induced by lattice topology, allowing for the direct visualization of spin arrangements and textures. However, the engineering of frustrated ice states in which individual spins can be manipulated in situ and the real-time observation of th...

It is known that optical activities can perform rotations. It is shown that the rotation, if modulated by attenuations, can perform symmetry operations of Wigner’s little group which dictates the internal space-time symmetries of elementary particles.