This paper aims to present explicit photon-like (3+1) spatially finite soliton solutions of screw type to the vacuum field equations of Extended Electrodynamics (EED) in relativistic formulation. We begin with emphasizing the need for spatially finite soliton modelling of microobjects. Then we briefly comment the properties of solitons and photons and recall some facts from EED. Making use of t...

Solitons are known to occur in the context of atom-light interaction via well-known semiclassical phenomenon self-induced transparency (SIT). Separately, regime where both light and atoms fully treated quantum mechanically, few-photon bound states be a ubiquitous that arises different systems such as coupled chiral or bidirectional waveguides, Rydberg atomic media. In specific case two-level wa...

We study the time-domain quantum-noise properties of solitons in optical fibers. Perturbation theory, including quantum description of the continuum, is used to derive a complete analytical expression for the second-order correlator of the amplitude quadrature in time domain. This correlator is subsequently used to calculate the photon-number noise reduction below the standard quantum limit by ...

We study the quantum-noise properties of spectrally filtered solitons in optical fibers. Perturbation theory, including a quantum description of the continuum, is used to derive a complete analytical expression for the second-order correlator of the amplitude quadrature. This correlator is subsequently used to optimize the frequency response of the filter numerically in order to achieve the min...

A collision of two-component Bose-Einstein condensates in the presence of Raman coupling is proposed and studied by numerical simulations. Raman transitions are found to be able to reduce collision-produced irregular excitations by forming a time-averaged attractive optical potential. Raman transitions also support a kind of dark soliton pairs in two-component Bose-Einstein condensates. Soliton...

Any new vector boson with non-zero mass (a `dark photon' or `Proca boson') that is present during inflation automatically produced at this time from vacuum fluctuations and can comprise all a substantial fraction of the observed dark matter density, as shown by Graham, Mardon, Rajendran. We demonstrate, utilising both analytic numerical studies, such scenario implies an extremely rich substruct...

Femtosecond lasers interacting with Kerr nonlinear optical materials, propagate in form of filaments due to the balance beam diffraction by self-focusing induced nonlinearity. laser filamentation is a universal phenomenon that belongs general class processes proper ultrashort processing systems, associated competition between nonlinearity and dispersion also known promote solitons. The present ...

this paper studies the generalized version of thezakharov-kuznetsov benjamin-bona-mahoney equation. the functionalvariable method as well as the simplest equation method areapplied to obtain solitons and singular periodic solutions to theequation. there are several constraint conditions that arenaturally revealed in order for these specialized type ofsolutions to exist. the results of this pape...

PT-Symmetry is one of the interesting topics in quantum mechanics and optics. One of the demonstration of PT-Symmetric effects in optics is appeared in the nonlinear directional coupler (NLDC). In the paper we numerically investigate the stability of temporal bright solitons propagate in a PT-Symmetric NLDC by considering gain in bar and loss in cross. By using the analytical solutions of pertu...