Amyloid-forming proteins undergo a structural transition from α-helical to disordered conformations and, ultimately, cross-β fibrils. The unfolding and aggregation of the amyloid β-peptide (Aβ) have been implicated in the development and progression of Alzheimer's disease (AD) and cerebral amyloid angiopathy (CAA). However, the events underlying the initial structural transition leading to the ...

We analyze the influence of dipole-dipole interactions between Rydberg atoms on the generation of Abelian artificial gauge potentials and fields. When two Rydberg atoms are driven by a uniform laser field, we show that the combined atom-atom and atom-field interactions give rise to new, nonuniform, artificial gauge potentials. We identify the mechanism responsible for the emergence of these gau...

in this research we work with the effective hamiltonian and the quark model. we investigate the decay rates of matter-antimatter of quark. we describe the effective hamiltonian theory and apply this theory to the calculation of current-current ( ), qcd penguin ( ), magnetic dipole ( ) and electroweak penguin ( ) decay rates. the gluonic penguin structure of hadronic decays is studied through th...

When a suspension consisting of dielectric particles having nonlinear characteristics is subjected to a sinusoidal (ac) field, the electrical response will in general consist of ac fields at frequencies of the higher-order harmonics. These ac responses will also be anisotropic. In this work, a self-consistent formalism has been employed to compute the induced dipole moment for suspensions in wh...

We investigate the two-dimensional transverse charge distributions of transversely polarized nucleon. As longitudinal momentum ($P_z$) nucleon increases, electric dipole moment is induced, which causes displacement and magnetization The induced proton reaches its maximum value at around $P_z \approx 3.2$ GeV due to kinematical reason. also how Abel transformations map three-dimensional in Breit...

– We theoretically investigate the mechanical effect of the light-induced dipole-dipole interaction potential on the atoms in a Bose-Einstein condensate. We present numerical calculations on the magnitude and shape of the induced potentials for different experimentally accessible geometries. It is shown that the mechanical effect can be distinguished from the effect of incoherent scattering for...

The polarization of rodlike polyelectrolytes has been analyzed by Brownian dynamics simulations, using a cube with a polymer in the center surrounded by counterions and byions. Electrostatic interactions both in the cube and beyond the cube were evaluated assuming periodic boundary conditions using Ewald summation. The effect of hydrodynamic interactions on the dynamics of the ions has been eva...

Surface tension, gamma, strongly affects interfacial properties in fluids. The degree to which polarizability affects gamma in water is thus far not well established. To address this situation, we carry out molecular dynamics simulations to study the interfacial forces acting on a slab of liquid water surrounded by vacuum using the Gaussian charge polarizable (GCP) model at 298.15 K. The GCP mo...