A5078637884- Gyrotron and Vacuum Electronics Research
- Black Holes and Theoretical Physics
- Pulsed Power Technology Applications
- Cosmology and Gravitation Theories
- Quantum Chromodynamics and Particle Interactions
- Particle accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- Electric Motor Design and Analysis
- Microwave Engineering and Waveguides
- Induction Heating and Inverter Technology
- Physics of Superconductivity and Magnetism
- Terahertz technology and applications
- Magnetic Bearings and Levitation Dynamics
- Acoustic Wave Resonator Technologies
- Algebraic structures and combinatorial models
- Quantum many-body systems
- Particle Accelerators and Free-Electron Lasers
- Silicon Carbide Semiconductor Technologies
- Multilevel Inverters and Converters
- Nonlinear Waves and Solitons
- Noncommutative and Quantum Gravity Theories
- Plasma Applications and Diagnostics
- Plasma Diagnostics and Applications
- Theoretical and Computational Physics
- Lightning and Electromagnetic Phenomena
Institute of Applied Physics
2016-2025
A.M. Obukhov Institute of Atmospheric Physics
2025
Russian Academy of Sciences
2012-2024
Eaton (United States)
2020-2024
Plasma (Russia)
2023
McMaster University
2023
Hebrew University of Jerusalem
2017-2022
University of Minnesota
2022
Tata Institute of Fundamental Research
2021
Fermi National Accelerator Laboratory
2015-2017
We comment on a simple way to accommodate translational symmetry breaking into the recently proposed holographic model which features superconducting dome-shaped region temperature-doping phase diagram.
We consider holographic superconductors in a broad class of massive gravity backgrounds. These theories provide description superconductor with broken translational symmetry. Such models exhibit rich phase structure: depending on the values temperature and disorder strength boundary system can be superconducting, normal metallic or pseudo-insulating phases. Furthermore supports interesting collective excitation charge carriers, which appears phase, persists superconducting but eventually...
In this paper we investigate properties of Chern-Simons theory coupled to massive fermions in the large N limit. We demonstrate that at low temperatures system is a Fermi liquid state whose features can be systematically compared standard phenomenological Landau liquids. This includes matching microscopically derived parameters with thermodynamic predictions theory. also calculate exact conductivity and viscosity tensors zero temperature finite chemical potential. particular point out Hall...
We investigate some phenomenological aspects of the holographic models based on tachyon Dirac-Born-Infeld action in anti--de Sitter space-time. These theories model strongly interacting fermions and feature dynamical mass generation symmetry breaking. show that they can be viewed as walking technicolor compute Peskin-Takeuchi $S$ parameter masses lightest technimesons for a variety potentials. also phase structure at finite temperature charge density. Finally, we comment Wilsonian...
We study behaviour of the critical $O(N)$ vector model with quartic interaction in $2 \leq d 6$ dimensions to next-to-leading order large-$N$ expansion. derive and perform consistency checks that provide an evidence for existence a non-trivial fixed point explore corresponding CFT. In particular, we use conformal techniques calculate multi-loop diagrams up including 4 loops general dimension. These results are used new CFT data associated three-point function Hubbard- Stratonovich field....
We study the field theory dual to a charged gravitational background in which low temperature entropy scales linearly with temperature. exhibit existence of sound mode is described by hydrodynamics, even at energies much larger than temperature, and explain how this, other properties theory, are consistent those (3+1)-dimensional Landau Fermi liquid, finely tuned Pomeranchuk critical point. also discuss one could engineer higher-derivative Lagrangian reproduces correct behavior shear...
We consider a UV-complete field-theoretic model in general dimensions, including $d=2+1$, that exhibits spontaneous breaking of continuous symmetry, persisting to arbitrarily large temperatures. Our consists two copies the long-range vector models, with $O(m)$ and $O(N-m)$ global symmetry groups, perturbed by double-trace operators. Using conformal perturbation theory we find weakly-coupled IR fixed points for $N\geq 6$ reveal symmetry. Namely, at finite temperature lower rank group is...
This paper discusses the impact of Pulse Width Modulated (PWM) current waveforms on electromagnetic losses and thermal characteristics a high-speed PMSM designed for an aerospace application. The PWM effects are studied Surface Permanent Magnet Synchronous Motor (SPMSM) 150 kW, 20000 rpm A 3D-Finite Element Model (FEM) machine is used analysis in JMAG software. First, model various using ideal sinusoidal waveform. These to study Motor-CAD. currents generated by modelling motor drive with...
We present the results of simulations and experimental studies a W-band surface-wave oscillator powered by ribbon high-current relativistic electron beam produced SINUKI accelerator (IAP RAS, Nizhny Novgorod, 1 kA / 650 keV 17 ns). Planar geometry interaction space facilitates efficient mode selection over wide transverse coordinate using open waveguide at fairly large oversize factor (the width is ~8 wavelengths). Stable oscillation regime obtained frequency 75 GHz with pulse duration about...
As the more-electric aircraft concept is gaining popularity, electric motors such as Permanent Magnet Synchronous Motors (PMSMs) are widely used in various aerospace applications. Though they have high torque and power density, presence of (PM) makes PMSMs vulnerable to demagnetization faults. This can significantly impact performance machine. Hence a analysis should be studied while designing motor. In this paper, selection PM material for 150 kW, 20000 rpm PMSM designed an propulsion...
We use the replica trick approach to calculate, in large-N limit, entanglement c-function two-dimensional quantum chromodynamics with gauge group U(N) and quark fundamental representation ('t Hooft model). show explicitly that result is equal a sum (with certain numerical coefficients) of c-functions free massive scalars, which represent mesons spectrum 't model. Interestingly, each meson contributes as point-like particle. provide an explanation for why this case.
We calculate conformal field theory data for the Gross-Neveu model in $2<d<4$ dimensions at next-to-leading order $1/N$ expansion. In particular, we make use of background method to derive various triangles involving composite operator ${s}^{2}$, Hubbard-Stratonovich $s$. then apply these obtain corresponding one-pion exchange coefficients.
A bstract We calculate various CFT data for the O ( N ) vector model with long-range interaction, working at next-to-leading order in 1 /N expansion. Our results provide additional evidence existence of conformal symmetry fixed point, as well continuity to short-range crossover point s * exponent parameter . also develop > generalization recently proposed IR duality between and deformed models, providing further its non-perturbative validity entire region d/ 2 <
A bstract We construct long-range fermionic models with the Gross-Neveu and GrossNeveu-Yukawa interaction, argue that their critical regimes are equivalent. To this end, we calculate various CFT data in ϵ- 1/ N- expansion, demonstrate agreement overlapping of validity.
We build a novel time-like coset sigma-model describing type-II superstring theory in charged rotating black-brane background that interpolates between locally $AdS_3$ the IR and linear-dilaton geometry UV. This allows one to perform systematic study of holography non-AdS backgrounds which are smoothly connected $AdS_3$. construct massless closed string states vertex operators NS-NS sector, calculate corresponding two-point correlation functions, discuss holographic interpretation our...
This paper presents the results of theoretical and experimental studies a surface-wave oscillator (SWO) planar geometry excited by ribbon high-current relativistic electron beam. Within framework quasi-optical approach direct three-dimensional particle-in-cell modeling, we demonstrate advantages open transverse edged configuration against closed one for effective mode selection at fairly large oversize factor. In experiments carried out on basis SINUKI accelerator (Institute Applied Physics...
We study global quantum quenches in a continuous field theoretic system with UV fixed point. Assuming that the characteristic inverse time scale of smooth quench is much larger than all scales inherent to except for UV-cutoff, we derive universal scaling behavior two-point correlation functions associated Dirac fields and spin-1 currents. argue certain regimes our results can be recovered using technique operator product expansion.
A bstract We use the background field method to systematically derive CFT data for critical ϕ 6 vector model in three dimensions, and Gross-Neveu dimensions 2 ≤ d 4. Specifically, we calculate OPE coefficients anomalous of various operators, up next-to-leading order 1/ N expansion.