Nonlinear massive spin-2 field generated by higher derivative gravity.
These are helicities of gravitatilnal field and these values mean that the given field is a spin 2 field. It is pretty much similar to quantum mechanics, where psi function with momentum squared L.
The key difference between high spin and low spin complexes is that high spin complexes contain unpaired electrons, whereas low spin complexes tend to contain paired electrons. The terms high spin and low spin are related to coordination complexes. These are called spin states of complexes. We can determine these states using crystal field theory and ligand field theory.Massive and massless spin-1 and spin-2 fields, their field equations and propagators are studied. The connection between local gauge symmetry and the coupling to a conserved current is derived in the massless case. The dynamical stress tensor is defined as source of gravity, and its local conservation is shown. The basic ideas of large extra dimensions is outlined in an appendix.Quaternion Spin 2 Field Theory Peter Hickman Abstract In this paper I propose solutions to the nature of Dark matter, Dark energy, Matter and the Matter-Antimatter asymmetry. The real spin representations of a 7d complex space are assumed to be the source of a chiral gauge group SU(8)xU(1) and a spin 2 quaternion field. The integral of the probability density of the spin 2 field results in a.
Michael's answer is basically right -- it's an accident of what we've observed so far, but there are a couple points that could be added: Actually, we have observed particles with spins higher than 1. The most common at colliders are bound state.Read More
Inspired by the translational gauge structure of teleparallel gravity, the theory for a fundamental massless spin-2 field is constructed. Accordingly, instead of being represented by a symmetric second-rank tensor, the fundamental spin-2 field is assumed to be represented by a spacetime (world) vector field assuming values in the Lie algebra of the translation group.Read More
Why do gravitons have spin 2? The reason is that gravitation is described by a metric (symmetric 2-tensor field) modulo general covariance, which gives locally, in the tangent Minkowski space of any point, a spin 2 representation of the Poincare group modulo longitudinal directions, whch forces mass 0 and helicity 2.Read More
Chiral nanoscale spin structures, such as magnetic skyrmions 1,2, as well as individual magnetic adatoms 3, have raised a lot of interest in recent years due to their potential for magnetic.Read More
Due to this direct contact, a lot of electron-electron repulsion occurs between the ligand fields and the dz 2 and dx 2-y 2 orbitals, which results in the dz 2 and dx 2-y 2 orbitals having high energy, as the repulsion has to be manifested somewhere. The ligand field only brushes through the other three dxz, dxy, and dyz orbitals. Since the ligand field does not have such direct contact with.Read More
A beam of spin one-half particles can also be separated by a Stern-Gerlach apparatus which uses a large gradient in the magnetic field to exert a force on particles proprtional to the component of spin along the field gradient. Thus, we can measure the component of spin along a direction we choose. A field gradient will separate a beam of spin one-half particles into two beams. The particles.Read More
We show also that the massive spin two field can be consistently described in arbitrary background by means of the lagrangian representing an infinite series in the inverse mass. Within string theory we obtain equations of motion for the massive spin two field coupled to gravity from the requirement of quantum Weyl invariance of the corresponding two dimensional sigma-model. In the lowest.Read More
Nuclear Magnetic Resonance. When the nuclear magnetic moment associated with a nuclear spin is placed in an external magnetic field, the different spin states are given different magnetic potential energies.In the presence of the static magnetic field which produces a small amount of spin polarization, a radio frequency signal of the proper frequency can induce a transition between spin states.Read More
Electron Spin Two types of experimental evidence which arose in the 1920s suggested an additional property of the electron. One was the closely spaced splitting of the hydrogen spectral lines, called fine structure.The other was the Stern-Gerlach experiment which showed in 1922 that a beam of silver atoms directed through an inhomogeneous magnetic field would be forced into two beams.Read More
We present a new formulation to deal with the consistency problem of a massive spin-2 field in a curved spacetime. Using Fierz variables to represent the spin-2 field, we show how to avoid the arbitrariness and inconsistency that exists in the standard formulation of spin-2 field coupled to gravity. The superiority of the Fierz frame appears explicitly in the combined set of equations for spin.Read More