### Day 2 :

#### Keynote Forum

#### Vasily Yu Belashov

Kazan Federal University, Russia

###### Keynote: Pair interaction of vortical structures in continuous media: Criterion of stability

Time : **09:00-09:30**

##### Biography:

Vasily Yu Belashov received his PhD in Radiophysics and DSc in Physics and Mathematics. His main fields are theory and numerical simulation of the dynamics of

multidimensional nonlinear waves, solitons and vortex structures in plasmas and other dispersive media. Presently, he is Chief Scientist and Professor at the Kazan

Federal University. He was Coordinator of studies on the international program solar terminator during 1987-1992, and took part in the international programs WITS/

WAGS and STEP. He is the author of 320 publications including seven monographs. His main books are Solitary Waves in Dispersive Complex Media: Theory, Simulation,

Applications Springer-Verlag GmbH, 2005 and; Solitons: Theory, Simulation, Applications, Kazan Federal University, 2016.

##### Abstract:

Interaction of vortices is very complicated and diverse and depends on a lot of conditions, such as initial configuration of

a system, parity of the sizes, degree of symmetry and vorticity of vortical formations etc., as we have shown earlier in our

numerical modeling on a level with the quasi-recurrence phenomenon, at pair interaction of vortices nontrivial situations can be

observed when interaction can result to formation of complex forms of vorticity regions, such as the vorticity filaments and sheets

and can end to formation of complex turbulent field. Prediction of the result of interaction is an important problem in physics of

fluids and plasma including applications to dynamics of vortex structures in the atmosphere, hydrosphere and a plasma, namely:

evolution of the cyclonic type synoptic and ocean vortices which can be considered as a vorticity front and interactions in the

vortex dust particles system and also dynamics of charged filaments which represent streams of charged particles in a uniform

magnetic field. To study behavior of vortical system near critical point dividing the possible regimes of pair interaction of vortices,

we introduce the criterion of stability which represents a combination of critical parameters of the interaction. Using this criterion

we can give theoretical explanation of the result of pair interaction in the system of vortices including 2D and 3D vortical systems.

Our approach can be effective in studying of the atmospheric and plasma vortex dynamics and useful for the interpretation of

effects associated with turbulent processes in fluids and plasmas.

#### Keynote Forum

#### Eliade Stefanescu

Institute of Mathematics of the Romanian Academy, Romania

###### Keynote: Matter dynamics in a unitary relativistic quantum theory

Time : **10:00:10:30**

##### Biography:

Eliade Stefanescu completed his graduation from Faculty of Electronics, Section of Physicist Engineers in 1970. He is a Doctor in Theoretical Physics, Senior Scientist I at

Advanced Studies in Physics Center; Titular Member of Academy of Romanian Scientists and Member of American Chemical Society in the Division of Physical Chemistry

– Subdivision of Energy. His research interests include open quantum physics with applications in theoretical and condensed matter physics and nuclear physics. He is

known for a microscopic theory of open quantum systems; the invention and a detailed description of a system converting environmental heat into usable energy and a

unitary relativistic quantum theory.

##### Abstract:

In a previous paper, we showed that the Hamilton equations of motion of a quantum particle are obtained as group velocities of

the wave packet describing this particle only if the time dependent phase of a particle wave is proportional to the Lagrangian,

not to the Hamiltonian as in a solution of the conventional Schrödinger equation. When a Lagrangian of relativistic form is

considered, the wave packet of a quantum particle takes a physical form, with a finite spectrum of a cut off velocity (c). Based

on a relativistic quantum principle, asserting the invariance of the time dependent phase for an arbitrary change of coordinates,

we obtained the relativistic kinematics and dynamics, the electromagnetic field equations, the spin and the electromagnetic and

gravitational interactions. When the Lagrangian is considered as a function of the Hamiltonian, we obtain a Schrödinger type

equation with an additional term depending on the velocity and the momentum operator. Based on this equation, we investigate

the dynamics of a relativistic quantum particle. In this framework, such a particle is described as a continuous distribution of

conservative matter, according to the general theory of relativity. In an electromagnetic field, any time dependent phase variation

is modified with a term proportional to a vector potential conjugated to the spatial coordinates and a scalar potential conjugated

to time. In a gravitational field, the time space coordinates are deformed. In such a field, any plane wave remains perpendicular on

a geodesic, while an additional acceleration is possible in the wave plane.

- Material Physics | Nano-Technology | Electromagnetism and Electronics | Condensed Matter Physics | Applied Physics

##### Location: Slyt 3

#### Session Introduction

#### Gaia Grimaldi

CNR – SPIN Institute, Italy

###### Title: Flux flow instability for testing superconducting materials in view of applications

Time : **10:50-11:10**

##### Biography:

Gaia Grimaldi has completed her PhD at Salerno University in collaboration with ENEA Research Center in Frascati, Rome at Superconductivity Laboratory in 2001.

She was a Visiting Researcher at Technical University of Munich, Germany in 2000. Since 2003, she is a Researcher at INFM - National Institute of Matter Physics,

then from 2005 at National Council of Research - CNR in the superconducting and other innovative materials and device, SPIN Institute. She has published more

than 55 papers in international journals and has been a Referee of many outstanding journals. (Sust, Nature, IEEE).

##### Abstract:

Super conductors can conduct electricity at a very low temperature where no energy is dissipated by resistive heating, so

superconductors can carry current with 100% efficiency. Actually the use of superconducting technology can make smaller,

lighter and more powerful equipments that can improve a power system's stability, reliability, quality and safety. As far as

energy power applications are concerned, the stability of the superconducting state becomes relevant for the operation of

these devices. Unfortunately, superconductivity becomes unstable under sufficiently high bias currents. Not only the highest

critical currents are required but also quenching phenomena need to be prevented in order to get the best performance of any

superconducting device. Typically this instability is observed in the current voltage characteristics as an abrupt voltage jump to

the normal state, which turns into a current driving quench event. Therefore such instability study arises as a valuable tool to

test the high current carrying capability of a superconductor. Experimental studies are performed in extremely high magnetic

fields and low temperatures as a function of the direction of the applied magnetic field in our Advanced Material Science and

Technology Research Master Labs. Here it is reported an overall study on different materials from low temperature to high

temperature and iron-based superconductors. The present technique can be employed as a direct tool to validate the stability

of superconducting materials for energy efficient technology.

#### Paul E Wagner

University of Vienna, Austria

###### Title: Direct experimental determination of contact angles and line tensions on the nano-scale

Time : **11:10-11:30**

##### Biography:

Paul E Wagner is currently Associate Professor at University of Vienna. Previously, he was embraced with some positions as Guest Scholar at Clarkson University,

USA; Guest Scholar at Kyoto University, Japan; Visiting Professor at the University of Helsinki, Finland. He was honoured with Smoluchowski Award for Aerosol

Research; Fellow of the Japan Society for the Promotion of Science; Honorary Member of the Committee on Nucleation and Atmospheric Aerosols and received

Honorary Doctorate from University of Helsinki. He served as Vice President of Gesellschaft für Aerosolforschung; Chairman of Committee on Nucleation and

Atmospheric Aerosols; Co-Chairman of five International Conferences. He was the author of 10 books and more than 180 refereed publications.

##### Abstract:

The wetting behaviour of liquids on solid surfaces depends on the interaction of molecules in the solid, liquid and gas

phases. This interaction can be characterized by the contact angle between solid and liquid surfaces in the vicinity of the

three phase contact line. For macroscopic systems a number of experimental techniques are available for measurement of

contact angles. Recently intermediate micron size systems have been studied as well. However, in the nano-scale contact angles

are hardly accessible. Here we report the first direct experimental determination of contact angles and contact line curvatures

on a scale of 1 nm. We have considered measurements of heterogeneous nucleation of super saturated water vapour on nearly

spherical and mono dispersed Ag particles with well defined seed particle radius rp down to about 1.5 nm. From the slope of

the activation curves we obtained the number n* of molecules in the critical cluster using the nucleation theorem. On the other

hand the onset saturation ratio, where 50% of the seed particles are activated, allows to determine the radius r* of the critical

cluster using the Kelvin relation. Based on rp, r* and n* the microscopic contact angle as well as radius and curvature of the

contact line can be directly obtained. We find microscopic contact angles around 15 degrees compared to 90 degrees for the

macroscopic equilibrium angle. This difference can be attributed to line tension as originally postulated by Gibbs. Line tension

is becoming increasingly dominant with increasing curvature of the contact line.

#### K E Prikhodko

National Research Centre “Kurchatov Institute”, Russia

###### Title: Radiation technique to control the atomic composition and physical properties of thin film materials for different super conductive and other functional nano-elements production

Time : **11:30-11:50**

##### Biography:

B A Gurovich is a Full Professor in National Nuclear University (MEPhI). He specializes in the the field of reactor materials science, radiation solid state physics. He

is an author of radiation techniques of material properties transformation under ion beam irradiation. He has published more than 150 papers in reputed journals.

##### Abstract:

The paper describes a technique developed by the authors to create composite micro and nano structures for various purposes

from metals, semiconductors, insulators and super conductive materials with different chemical and physical properties.

The chemical composition and properties of materials can be controlled by means of ion beam irradiation. The technique is

implemented in three ways: by selective removal of atoms (SRA) to produce metals and semiconductors from insulators; the

selective displacement of atoms (SDA) to change the atomic composition from one atom to another (to change properties of

superconductive materials); and the selective association of atoms (SAA) to produce insulators. Present technique has been

successfully used to solve a number of urgent tasks in creating micro and nano devices. We have reached a three dimensional

structures resolution of about 15 nm for patterned magnetic media (153 Gb/in2). The metal wires with nanoscale section in

dielectric matrix were created. We have demonstrated the transformations of oxides to metals and semiconductors (Cu, W, Co,

Bi, Mo, Ta, Ge, etc.,) by SRA technique of nitrides to oxides (Si, Al, Ti, Ga, Nb) by SDA technique; and of pure elements (Si, Al,

Ti, Nb) to oxides by SAA technique. We have demonstrated formation of main cryoelectronics elements: resistors, capacitors

and planar Josephson junctions from initial superconductive NbN (5 nm) film by using ion beam irradiation and of on chip

integrated resistive elements for super conductive single photon detectors (SSPD) with photons number resolution.

#### Ulrich Wulf

Brandenburg University of Technology Cottbus-Senftenberg, Germany

###### Title: Semiempirical quantum transport model for SOIFETs and FinFETs

Time : **11:50-12:10**

##### Biography:

Ulrich Wulf after his PhD at the Max-Planck Institute in Stuttgart, Germany, went to a Postdoctoral stay at the Indiana State University in Bloomington IN, USA. In

1993 he returned to Germany to the Brandenburg Technical University as an Associate Professor. Besides teaching, he runs a small theory group with the focus

of quantum transport and nanoelectronics. Since 2013 they maintain a close cooperation with Global Foundries in Dresden which provided the devices to verify

their semiempirical model.

##### Abstract:

In a series of recent publications a semiempirical quantum model for conventional bulk- metal-oxide-semiconductor fieldeffect

transistor (MOSFETs) was developed. This model was verified comparing with the traces of a variety of experimental

devices. After reviewing the semiempirical model we demonstrate the essential extensions necessary to be able to describe silicon

on insulator field-effect transistor (SOIFETs) or fin field-effect transistor (FinFETs) used in state-of-the-art semiconductor

industry. In these devices the source- and the drain contact as well as the conduction channel of the transistor are confined

in depth direction to a thin silicon film (Si-film). In the first step we demonstrate that the quantum mechanical raise of the

Fermi energy in the source and the drain which is associated with the narrow confinement in the depth direction leads to

an increase of the effective channel length. This increase reduces a degradation of the output traces caused by source-drain

tunneling. In the second step we calculate the supply functions in our semiempirical model to assess the decrease of the usable

signal current through the conduction channel with decreasing width of the Si-film. In the third step we calculate the complete

output characteristics to compare bulk FETs with SOIFETs or FinFETs within the semiempirical model. The trade-off between

desirable reduction of source-drain tunneling on the one hand and detrimental decrease of signal current on the other hand

is discussed.

#### Dragos Victor Anghel

Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania

###### Title: Peculiarities of the BCS theory of superconductivity

Time : **12:10-12:30**

##### Biography:

Dragos Victor Anghel has completed his PhD in year 2000, at the University of Jyvaskyla, Finland. From 2000 to 2005 he held Postdoc positions in the University

of Jyvaskyla and in the University of Oslo. From 2005 he moved to IFIN-HH, Romania (the present institution), where he is now Senior Researcher (grade 1) and a

member in the Editorial Board of the journal Romanian Reports in Physics. He is an author or coauthor of more than 60 papers in reputed physics ISI journals and

participated as an invited speaker in numerous prestigious international conferences.

##### Abstract:

We study the effect of the relative value of the chemical potential with respect to the middle of the attraction band, on

the results of the BCS theory of superconductivity. In this way, we observe that the phenomenology predicted by the

theory is much richer than previously expected. If the attraction band (i.e. the interval in which the pairing interaction is

manifested) is not symmetric with respect to the chemical potential, then the equation for the energy gap has two solutions,

the superconductor-normal metal phase transition temperature is changed, and the phase transition may become of the first

order. The phase transition temperature decreases with the asymmetry, so, if the asymmetry is modified by doping of the

superconductor or by applying pressure, then a structure similar to the so called superconducting dome is formed if we plot

the transition temperature vs. doping or pressure.

#### L. Gr. Ixaru

Horia Hulubei National Institute of Physics and Nuclear Engineering, Romania

###### Title: A biophysics problem: Computational difficulties and their solution

Time : **12:30-12:50**

##### Biography:

L Gr Ixaru is a Professor of Computational Physics and a member of the Academy of Romanian Scientists. He has written three books and more than 70 scientific

papers in well reputed journal. He was distinguished with some national and international prizes and served as a member in the editorial boards of two high standard

journals.

##### Abstract:

The problem is in the field of controlled drug release. Many mechanisms have been examined along time in this area but

here we consider one which is based on the osmosis effect, as described in A G Popescu et al., Romanian J. Biophys. 20:223-

234 (2010) and references therein. These authors investigate the time evolution of a spherical liposome with a semipermeable

coat and containing a solution of some pharmaceutical drug, when this is immersed into a bay of a solvent. Due to the osmosis,

the liposome is swelling from the initial radius R0 up to a critical value Rc at which the surrounding membrane becomes so

stressed that a pore of radius rc is produced on its surface. A second stage then begins where some part of the drug content Q is

released through the pore and thus the liposome is relaxed until reaching the original radius. A new cycle of the same type can

begin with the only difference that now the input Q is smaller than before, and this is repeated as many times as Q is sufficient

for ensuring a swelling up to Rc. As mentioned in the quoted paper, the two-stage cycle is mathematically characterized by a

differential equation for R (swelling) and a system of three such equations for R, r and Q (relaxation). The numerical solution

of the latter rises difficulties because this is stiff and then it asks for a high stability method. The Runge-Kutta methods are of

two types, explicit and implicit. The explicit methods are easy to use but with low stability properties while vice versa holds

true for the implicit methods. A method which brings the qualities of the two under the same umbrella is presented. It is of

a special type in the sense that its coefficients are equation dependent, not constant, as in the standard literature on Runge-

Kutta methods. The method is applied on the considered problem and the results confirm that the osmosis-based mechanism

deserves indeed serious attention in the area of controlled drug release.

#### Majid Amooshahi

University of Isfahan, Iran

###### Title: Canonical relativistic quantization of electromagnetic field in the presence of an anisotropic conductor magneto-dielectric medium

Time : **13:50-14:10**

##### Biography:

Majid Amooshahi is faculty member of physics department in university of Isfahan, Isfahan, Iran.

##### Abstract:

A canonical relativistic quantization of electromagnetic field is introduced in the presence of an anisotropic conductor

magneto-dielectric medium. The medium is modeled by a continuum collection of the vector fields and a continuum

collection of the antisymmetric tensor fields of the second rank in Minkowski space-time. The collection of vector fields

describes the conductivity property of the medium and the collection of antisymmetric tensor fields describes the polarization

and the magnetization properties of the medium. The conservation law of the total electric charges, induced in the anisotropic

conductor magneto-dielectric medium, is deduced using the antisymmetry conditions imposed on the coupling tensors that

couple the electromagnetic field to the medium. Two relativistic covariant constitutive relations for the anisotropic conductor

magneto-dielectric medium are obtained. One of the constitutive relations relates the free electric current density fourvector,

induced in the medium, to the strength tensor of the electromagnetic field. Another constitutive relation relates the

antisymmetric electric -magnetic polarization tensor field of the medium to the strength tensor of the electromagnetic field.

It is shown that for a homogeneous anisotropic medium the susceptibility tensor of the medium satisfies the Kramers-Kronig

relations. Also it is shown that for a homogeneous anisotropic medium the real and imaginary parts of the conductivity tensor

of the medium in frequency domain, are related to each other by the Kramers-Kronig relations and a relation other than the

Kramers-Kronig relations. The electromagnetic field together with the anisotropic conductor magneto-dielectric medium are

quantized in a canonical relativistic standard way in the Gupta-Bleuler framework.

#### Vasily Yu Belashov

Kazan Federal University, Russia

###### Title: New sight at the nature of superconductivity phenomenon: Simple explanation

Time : **14:10-14:30**

##### Biography:

Vasily Yu Belashov has DSc degree in Physics and Mathematics. His main fields are: theory and simulation of the dynamics of multidimensional nonlinear waves,

solitons and vortex structures in plasmas and other dispersive media. Presently, he is Chief Scientist and Professor at the Kazan Federal University. He is author

of 320 publications including seven fundamental monographs.

##### Abstract:

All existing interpretations of superconductivity are based anyhow on the idea of the charge transfer by free carriers. The

exotic conditions of the nondissipative transfer are sought in all cases. But it is possible to explain this phenomenon more

simply: by collectivization of the bound valence electrons in a macrobody. So, we postulate the possibility of existence of such

state of solid when the valence electrons being in the stationary energy state, get common for all ensemble of atomic remains of

solid. In other words, we postulate the possibility of existence of the giant molecule (gimole) with uniprobable localization of

the bound valence electrons on all atomic remains (i.e. the wave function of each of these electrons is distributed quasiuniform

in all space of gimole). That corresponds to the N-multiple exchange degeneracy of the energy levels where N is the atomic

remains’ number in gimole. So, we propose the explanation of nature of phenomenon which is based on the postulate of

possibility of existence of the gimole with uniprobable localization of the bound valence electrons on all atomic remains,

without drawing of the idea of charge transfer by free carriers and without inventing of various exotic conditions for realization

of the nondissipative transfer. Thus, the explanation of the nature of superconductivity phenomenon which is based on the

postulate of possibility of existence of the gimole with uniprobable localization of the bound valence electrons on all atomic

remains is proposed. A way of the experimental testing of our model is shown.

- Astro-Particle Physics & Cosmology | Plasma Science

##### Location: Slyt 3

#### Session Introduction

#### Herman Holushko

Independent Researcher, Canada

###### Title: Analysis of Type Ia supernovae light curves in observed bands

Time : **14:30-14:50**

##### Biography:

Herman Holushko received MS degree in Computer Science at The Bauman Moscow State Technical University in 1990. He has professional experience in

computer simulation and currently works as a Software Engineer in Canada. His articles on computer simulations were published in professional journals and

conference proceedings. As an independent researcher he applies his experience for research in astrophysics.

##### Abstract:

Type Ia supernovae play an important role of standard candles in modern cosmology. They also exhibit a phenomenon of

light curve broadening which increases with distance. It is widely accepted that the broadening is proportional to (1+z)

factor and strongly supports accelerated expansion of Universe. However, the analysis of the conducted research on the Type Ia

supernovae reveals some deficiencies and logical loops in it. To eliminate such problems, it is suggested to analyze observational

data by building light curves in observed bands without fitting to templates. Using observational data of 3-years Supernova

Legacy Survey (SNLS), the empirical light curves were built for each supernova in griz bands (whenever it was possible) in

natural (non-logarithmic) scale, for red shifts greater than 0.6. The theoretical predictions of light curves in observed griz

bands for different red shifts were obtained using computer simulation of light propagation from exploding supernova to

an observer. The simulation model uses the assumptions of the standard model on (1+z) time dilation. The input data for

computer simulation are spectra templates of typical Type Ia supernova explosion. The simulation model also considers light

extinction in our galaxy and filter transmission characteristics of the telescopes used in SNLS. The comparison of simulated

light curves with light curves built using SNLS observational data reveals violations of (1+z) time dilation hypothesis. Some

of the results point to the existence of dust in the intergalactic space. Recommendations for future observations of supernovae

were submitted to NASA and published on NASA web-site.

#### John E Brandenburg

Morningstar Applied Physics, USA

###### Title: The GEMS (Gravity Electro Magnetism Super) unification theory – a theory of the unification of the four forces of nature

Time : **14:50-15:10**

##### Biography:

John E Brandenburg has completed his PhD from University of California at Davis extension campus at Lawrence Livermore National Laboratory and performed

extensive research on plasma physics for both fusion energy and space propuslion. He has worked at Sandia National Laboratory, the Florida Space Institute and

numerous aerospace companies in the United States. He has published extensively on plasma physics, field unification, and space and planetary science. He also

writes science fiction under the pen name Victor Norgarde.

##### Abstract:

This paper presents recent results of the GEMS (Gravity-Electro-Magnetism Super) unification theory which unifies the

four forces of nature. The GEMS theory was an unexpected development of an effort to unify only the two long-range

forces of nature: gravity and electromagnetism (EM). The two long range forces gravity and electro-magnetism are first unified,

and out of this unification also proceeds the unification of the short range weak and strong nuclear forces. They are unified

under the two postulates that: 1. Gravity fields are an array of electromagnetic Poynting cells and 2. The separate appearance of

gravity and EM fields from each other is correlated with the separation of protons and electrons from each other as they emerge

from the Planck scale with the appearance of a compact or hidden dimension. In the Standard Model all massive particles are

charged and move freely at short distances and even photons spend time as charged particles. The quark-electron split occurs

based on the asymmetry in dimensionality between space and time, with 3 quark colors representing space and the electron

representing time. The theory can be thought of as presently, a Bohr model of field unification, rudimentary but useful. The

theory is primarily geometric, and the classical radii of charged particles plays an unexpected role in physical calculations. The

proton, with its three interior quarks is born with the same effective radius as the electron- the electrostatic classical radius,

with the gluon-photon separation also occurring. The theory produces the value of G: the Newton gravitation constant, and

the proton mass accurately from the Planck scale with no free parameters. The theory produces the values of the masses,

charges and spins for the pions of the strong force and the W and Z bosons of the weak force as quantum Mie scatterings off

the compact dimension structures associated with the proton and electron masses. The Higgs boson mass follows from similar

formalism. The GEM theory extends the Standard Model to include gravitation and a detailed correspondence is shown with

electro-weak theory. The theory predicts a short lived, neutral spin 0 particle will be found at rest mass-energy approximately

22 MeV, and that a basic GEMS parameter σ=42.8503, occurs throughout the standard model in ratios of particle masses.

##### Biography:

Carl Strutinski studied Geological Sciences at the University of Bucharest. He worked for over 15 years in a geological enterprise for prospection and exploration,

and then for another 17 years at the Geological Institute of Romania (Bucharest), studying metamorphism and geotectonics. Since 1990, he published seminal

papers on the transcurrence phenomena in mountain building.

##### Abstract:

One of the most celebrated achievements of the plate tectonics theory (PTT) was the finding that rifting within continents

may lead to ocean spreading and permeation of oceanic lithosphere between fragmented blocks of continental lithosphere.

That the reverse, viz permeation of continental lithosphere through oceanic lithosphere, may be equally possible, yet under

totally different circumstances, has not been considered until now. This, I assume, is a deficiency of the PTT and a consequence

of its dealing with rigid plates on a constant-radius Earth. Within the frame of the improved Earth Expansion Model (EEM)

I postulate that creeping mantle currents carrying continents on their back are able to penetrate suboceanic lithosphere and

concomitantly assimilate and entrain the oceanic domains frontally encountered. The purpose of this study is to present

evidence of: 1) the existence of a lithospheric current under SE Asia; 2) the penetration of this current into the northeastern

flank of the Paleo-Indian Ocean and isolation of the extreme part of it as the West Philippine Basin; 3) the southeastward

displacement of the oceanic domains situated directly in front of the current, i.e. those portions now forming the more or less

tectonized basement of the Celebes, Banda and some smaller oceanic basins as well as the Ontong Java Plateau (OJP). In PTT

reconstructions the latter is unanimously considered to have been formed in the Mid-Pacific (Fig. 1A) while I am asserting that

it was initially placed in the present Gulf of Bengal (Fig. 1) forming a land bridge between India (IND) and Australia (AUS).

#### J Buitrago

University of La Laguna, Spain

###### Title: Transformation properties of electromagnetic field strength quantities under local gauge U(1) symmetry described in two-spinor language and induced zitterbewegung (trembling motion) in spin 1/2 particles

Time : **15:50-16:10**

##### Biography:

J Buitrago is a Professor of Physics at the University of La Laguna in Tenerife (Spain). He obtained his degree in Theoretical Physics at the University Complutense

of Madrid and later was, during two years, in Max-Planck Institute für Astronomy (Heidelberg) with a Grant from the Max Planck Gesellschaft. His research activities

have been on a wide range of disciplines such as general relativity, relativistic quantum theory, gauge theories, cosmology, some areas of astrophysics, gravitational

waves and cosmology. He has imparted undergraduate and graduate courses on astrophysics, nuclear physics, general relativity, cosmology and gauge theories.

He directed 5 doctoral theses and published more than 40 articles. He was also visiting fellow during six months at the University College of Cardiff as well as three

months in Cambridge

##### Abstract:

After a brief discussion about classical local U(1) gauge invariance in Weyl two-spinor form (in terms of the electric and

magnetic field strength components) and the associated two spinor equations equivalent to the Lorentz force equation of

electrodynamics. The local U(1) gauge transformation properties of the different components of the symmetric second order

electromagnetic field spinor are analyzed. It is found that only the third component of the magnetic field is changed by local

gauge transformations. Using the gauge freedom associated with the third component of the magnetic field and choosing an

specific gauge (in a somewhat similar manner as the familiar Coulomb gauge in QED) it is shown that the phenomenon of

zitterbewegung (trembling motion) appears in a natural way as internal motion with the velocity of light applicable to any

one-half spin particle thus suggesting a kinematic origin of its rest mass and helicity. This result is in sharp contrast with the

traditional interpretation (emerging from the Dirac equation) as transitions between positive and negative energy states.

#### Khatuna Chargazia

Ivane Javakhishvili Tbilisi State University, Georgia

###### Title: Nonlinear dynamics of the solitary vortices and the wave structures in the complex media

Time : **16:10-16:30**

##### Biography:

Khatuna Chargazia has completed her PhD from Ivane Javakhishvili Tbilisi State University in 2006 and Postdoctoral studies from M Nodia Institute of Geophysics.

She is the team Leader of the group of ionospheric studies at the Tbilisi State University. She has published more than 70 papers in reputed journals.

##### Abstract:

Based on mathematical models of describing the multidimensional soliton-type structures in complex media (ionospherean

atmosphere, hydrosphere, ionospheric and magnetospheric plasma) the nonlinear dynamics of electromagnetic solitary

vortices and the wave structures have been studied. Nonlinear wave structures can be a purely monopoly vortex, a transverse

vortex chain, and/or a longitudinal vortex path against the background of an inhomogeneous zonal wind, depending on the

shear flow velocity profile. The accumulation of such vortices in the ionospheric medium can generate a strongly turbulent

state. The interaction of soliton type multidimensional structures in the complex media, described by DNSL class of equations

taking into account of dispersive and dissipative effects are studied numerically and interesting results are obtained.