Communications in Physics
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Extensive Air Showers and the LPM Effect
Communications in Physics - Tập 20 Số 2 - 2010
A very simple model of thelongitudinal development of electromagnetic showers is
presented,allowing for easy calculations at the highest energies where
usualsimulation codes become impracticable because of the enormousmultiplicity
of secondary shower particles. Shower profiles aredescribed in terms of a few
parameters having Gaussianfluctuations. The model is applied to the impact of
theLandau-Pom...
Secure Information Exchange Without Prior Key Distribution via Single-photon Hyperstates
Communications in Physics - Tập 32 Số 3 - 2022
Methods for two distant parties to exchange their secret messages using single
photons are considered. There existed several such methods but they are either
insecure or face with information leakage problem. Recently, Ye et al. [Quantum
Inf. Process. 20 (2021) 209] have reported a method using single photons in both
polarization and spatial degrees of freedom that is both efficient and resistant
...
#Secure information exchange #information leakage #single-photon hyperstates
Investigation of Some Characterizations of Black TiO\(_2\) Nanotubes Via Spectroscopic Methods
Communications in Physics - Tập 29 Số 2 - Trang 189 - 2019
The black TiO\(_2\) with substantial Ti\(^3+\) and oxygen vacancies exhibit an
excellent photoelectrochemical water-splitting performance due to the improved
charge transport the extended visible light response. In this study, black
TiO\(_2\) nanotube arrays synthesized by the anodization method, and then, they
have been investigated some characterizations by spectroscopic methods such as
UV-visib...
#black TiO2 #spectroscopic technique #water-splitting #photocatalysis
Gauge Origin of Double Dark Parity and Implication for Dark Matter
Communications in Physics - Tập 32 Số 2 - 2022
Dark matter must be stabilized over the cosmological timescale, which demands
the existence of a stabilizing symmetry, derived by a dark charge, $D$. The
existence of this dark charge may affect the quantization of electric charge,
which theoretically shifts the electric charge, thus the hypercharge to a novel
gauge extension, $SU(3)_C\otimes SU(2)_L\otimes U(1)_Y\otimes U(1)_N$, where $N$
determi...
#Gauge model #Discrete symmetry #Dark matter
Enhanced Performance in Polymer Light Emmiting Diode by Using Ultra-thin Conductive Films as the Buffer Layer
Communications in Physics - Tập 24 Số 3S1 - 2014
The ultra-thin nanocomposite films based on the nano-crystal TiO$_{2}$
(TiO$_{2}$-nc) or multi-walled carbon nano-tube (MWCNTs) were prepared and used
as the buffer layers in the fabrication of the organic light-emitting diodes
(OLEDs). The injection efficiency of the hole and electron was improved by
inserting an ultra-thin buffer layer between the electrodes and emissive layer.
The turn-on volta...
#nanocomposites #conducting polymer #blended polymer #light emitting diode #CNTs.
Two Spot Coupled Ring Resonators
Communications in Physics - Tập 29 Số 4 - 2019
Abstract. We consider a model of two coupled ring waveguides with constant
linear gain and nonlinear absorption with space-dependent coupling. This system
can be implemented in various physical situations as optical waveguides, atomic
Bose-Einstein condensates, polarization condensates, etc. It is described by two
coupled nonlinear Schrödinger equation. For numerical simulations, we take local
two...
#Bose Einstein condensates #nonlinear optical systems #ring resonators
Influence of Annealing Conditions on Structure and Critical Parameters of Ni50Mn37Sn13 Magnetocaloric Material
Communications in Physics - Tập 24 Số 1 - 2014
In this paper, we present the influence of annealing conditions on structure and
magnetic behavior of Ni\(_{50}\)Mn\(_{37}\)Sn\(_{13}\) magnetocaloric alloy
prepared by arc-melting technique. The results show that the almost single phase
of the full Heusler structure of Ni\(_{2}\)MnSn could be achieved by appropriate
annealing. The transformation between martensite and austenite phases, and
multi-...
#Giant magnetocaloric effect #Heusler alloys #Arrott-Noaks Plot #Magnetic transition
Challenges in particle physics and 3-3-1 models
Communications in Physics - Tập 25 Số 2 - 2015
At present, particle physics faces problems related with disparity in diphoton
decay of Higgs boson, discrepancybetween theory and experiment of about $3.6
\si$ in anomalous magnetic moment of the muon and neutrino physics.Moreover, the
existence of Dark Matter and the Matter-Antimatter Asymmetry are challenges
for any physical model.In this review I present some solutions in the framework
...
#Particle-theory and field-theory models %of the early Universe #Supersymmetric models #Non-standard-model %neutrinos #right-handed neutrinos
Effect of Geometrical Properties on Localized Surface Plasmon Resonance of Gold Nanoparticles
Communications in Physics - Tập 31 Số 4 - 2021
This work reportson plasmonic effects (i.e light scattering and absorption
properties) induced by two different gold nanoparticles (AuNPs)-shaped:
spherical particle and triangular particle. The scattering cross-section and
electric field profiles have been investigated by using theboundary element
method (MNPBEM toolbox). Two configurations: the isolated AuNPand the
coupledtwo-gold NPsystem have ...
#simulation #plasmonic #metallic nanoparticle #nanosphere #nanotriangle
Theranostic Gold Nanoshells: from Synthesis to Imaging and Photothermal Therapy Applications
Communications in Physics - Tập 24 Số 3S2 - 2016
Gold nanoshells (GNSs) were grown on monodispersed aminoprotpyltriethoxysilane
(APTES) functionalized of silica nanoparticles (NPs) cores with varying sizes
ranging from 40-180 nm synthesized by Stober route. Gold shells were deposited
onto the surface of silica NPs by tetrakis(hydroxymethyl) phosphonium chloride
(THPC) and electroless gold plating method. The coverage of the gold nanoshells
on th...
#gold nanoshells #silica NPs #SPR #dark field image #photothermal therapy
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