Formation of a Kerr black hole from two stringy NUT objects

In this paper we show that an isolated Kerr black hole can be interpreted as arising from a pair of identical counter-rotating NUT objects placed on a symmetry axis at the appropriate critical distance from each other.     

Bright,Highly Water‐Soluble Triazacyclononane Europium Complexes To Detect Ligand Binding with Time‐Resolved FRET Microscopy

Luminescent europium complexes are used in a broad range of applications as a result of their particular emissive properties. The synthesis and application of bright, highly water‐soluble, and negatively charged sulfonic‐ or carboxylic acid derivatives of para‐substituted aryl–alkynyl triazacyclononane complexes are described. Introduction of the charged solubilizing moieties suppresses cellular uptake or adsorption to living cells making them applicable for labeling and performing assays on membrane receptors. These europium complexes are applied to monitor fluorescent ligand binding on cell‐surface proteins with time‐resolved Förster resonance energy transfer (TR‐FRET) assays in plate‐based format and using TR‐FRET microscopy.     

Yb-laser based on the LMA active fiber and multimode Bragg grating

An ytterbium-fiber laser based on an active fiber with an increased core diameter and a multimode grating is created and studied. It is demonstrated that the effective reflection of the Bragg grating amounts to 96%. The laser line width is about 3 nm, which indicates the propagation of a superposition of modes in the multimode fiber. The repetitively pulsed regime of lasing, which can be related to the mode beating, is demonstrated     

Zero-sound branches in asymmetric nuclear matter

A polarization operator constructed in the random phase approximation is used to obtain zero-sound excitations in isospin asymmetric nuclear matter (ANM). Two families of the complex solutions ω_sτ(k),τ= p,n are presented. The imaginary part of the solutions corresponds to the damping of the collective mode due to its overlapping with the particle-hole modes and the subsequent emission of a proton (ω_sp(k)) or a neutron (ω_sn(k)). The dependence of the solutions on the asymmetry parameter is studied.     

Three-body nuclear interactions in the QCD sum rules

The QCD sum rules used to calculate the characteristics of single-particle nucleons are reviewed briefly. The contribution from three-body forces to the nucleon self-energies are calculated.     

3D Calculations of Variants of the SPD Magnetic System Detector for the NICA Complex

Physics of Particles and Nuclei Letters - In this paper we give an overview of the results of a numerical simulation of the 3D distributions of magnetic fields for the SPD detector at NICA (Joint...     

On the deformation method of study of global asymptotic stability

We consider the one-parameter family of systems $$x' = F(x,\lambda ), x \in \mathbb{R}^n , 0 \leqslant \lambda \leqslant 1,$$ where F: ? ⁿ × [0, 1] → ? ⁿ is a continuous vector field. The solution x(t) = φ(t, y, λ) is uniquely determined by the initial condition x(0) = y = φ(0, y, λ) and can be continued to the whole axis (?∞, +∞) for all λ ∈ [0, 1]. We obtain conditions ensuring the preservation of the property of global asymptotic stability of the stationary solution of such a system as the parameter λ varies.     

Spin-phonon interactions in cuprates

The parameter ζ of spin-phonon coupling is obtained through the analysis of the spin-wave dynamics of magnetic systems. It is shown that the parameter of spin-phonon coupling is greater, the greater the relative electron-ion potential g ₁, the smaller the exchange correlation radius r _c , and the smaller the mass M of ions that form a crystalline lattice.