Abstract Scattering amplitudes have their origin in quantum field theory, but wide-ranging applications extending to classical physics. We review a formalism connect certain observables scattering amplitudes. An advantage of this is that it enables us study implications the double copy gravity. discuss examples including total change particle’s momentum, and gravitational waveform, during encou...

Abstract The soft limits of scattering amplitudes have been extensively studied due to their essential role in the computation physical observables collider physics. universal factorisation that occurs these kinematic has shown be related conservation laws associated with asymptotic, or large, gauge symmetries. This connection led a deeper understanding symmetries and gravitational theories ref...

The present investigation is to study the surface waves propagation with imperfect boundary between an isotropic elastic layer of finite thickness and a homogenous isotropic thermodiffusive elastic half- space with rotation in the context of Green-Lindsay (G-L model) theory. The secular equation for surface waves in compact form is derived after developing the mathematical model. The phase velo...

In conventional direct torque control (DTC) of induction machines, undesirable flux and torque ripples are produced. These occur since non of the selected inverter's voltage vectors are able to generate the exact voltage required to produce the desired changes in the electromagnetic torque and stator flux linkage in most of the switching instances. In addition, when direct torque control is imp...

The spin-4/3 fractional superstring is characterized by a chiral algebra involving a spin-4/3 current on the world-sheet in addition to the energy-momentum tensor. These currents generate physical state conditions on the fractional superstring Fock space. Scattering amplitudes of these physical states are described which satisfy both spurious state decoupling and cyclic symmetry (duality). Exam...

Splitting amplitudes govern the behavior of scattering amplitudes at the momenta of external legs become collinear. In this talk we outline the calculation of two-loop splitting amplitudes via the unitarity sewing method. This method retains the simple factorization properties of light-cone gauge, but avoids the need for prescriptions such as the principal value or Mandelstam-Leibbrandt ones. T...

Abstract The post-Minkowskian expansion of Einstein’s general theory relativity has received much attention in recent years due to the possibility harnessing computational power modern amplitude calculations such a classical context. In this brief review, we focus on as applied two-body problem without spin, and describe how relativistic quantum field can be used greatly simplify analytical bas...