Excursions through KK modes
Abstract
In this article we study KaluzaKlein (KK) dimensional reduction of massive Abelian gauge theories with charged matter fields on a circle. Since local gauge transformations change position dependence of the charged fields, the decomposition of the charged matter fields into KK modes is gauge dependent. While whole KK mass spectrum is independent of the gauge choice, the mode number depends on the gauge. The masses of the KK modes also depend on the field value of the zeromode of the extra dimensional component of the gauge field. In particular, one of the KK modes in the KK tower of each massless 5D charged field becomes massless at particular values of the extradimensional component of the gauge field. When the extradimensional component of the gauge field is identified with the inflaton, this structure leads to recursive cosmological particle productions.
 Authors:
 Manipal Centre for Natural Sciences, Manipal University,Manipal, Karnataka 576104 (India)
 Publication Date:
 Sponsoring Org.:
 SCOAP3, CERN, Geneva (Switzerland)
 OSTI Identifier:
 22572112
 Resource Type:
 Journal Article
 Resource Relation:
 Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2016; Journal Issue: 07; Other Information: PUBLISHERID: JCAP07(2016)008; OAI: oai:repo.scoap3.org:16317; ccby Article funded by SCOAP3. Content from this work may be used under the terms of the Creative Commons Attribution 3.0 License. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.; Country of input: International Atomic Energy Agency (IAEA)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; COMPACTIFICATION; COSMOLOGICAL INFLATION; COSMOLOGY; GAUGE INVARIANCE; INFLATIONARY UNIVERSE; INFLATONS; KALUZAKLEIN THEORY; MANYDIMENSIONAL CALCULATIONS; MASS SPECTRA; QUANTUM FIELD THEORY; SPACE DEPENDENCE; STRING THEORY
Citation Formats
Furuuchi, Kazuyuki. Excursions through KK modes. United States: N. p., 2016.
Web. doi:10.1088/14757516/2016/07/008.
Furuuchi, Kazuyuki. Excursions through KK modes. United States. doi:10.1088/14757516/2016/07/008.
Furuuchi, Kazuyuki. 2016.
"Excursions through KK modes". United States.
doi:10.1088/14757516/2016/07/008.
@article{osti_22572112,
title = {Excursions through KK modes},
author = {Furuuchi, Kazuyuki},
abstractNote = {In this article we study KaluzaKlein (KK) dimensional reduction of massive Abelian gauge theories with charged matter fields on a circle. Since local gauge transformations change position dependence of the charged fields, the decomposition of the charged matter fields into KK modes is gauge dependent. While whole KK mass spectrum is independent of the gauge choice, the mode number depends on the gauge. The masses of the KK modes also depend on the field value of the zeromode of the extra dimensional component of the gauge field. In particular, one of the KK modes in the KK tower of each massless 5D charged field becomes massless at particular values of the extradimensional component of the gauge field. When the extradimensional component of the gauge field is identified with the inflaton, this structure leads to recursive cosmological particle productions.},
doi = {10.1088/14757516/2016/07/008},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 07,
volume = 2016,
place = {United States},
year = 2016,
month = 7
}

We propose a method for calculating the degree of polarization of nonmonochromatic radiation as it propagates through a singlemode fiber optical waveguide (SMF), based on dividing the length of the fiber into segments equal to the depolarization length of the radiation in the SMF. We have obtained the dependences of the degree of polarization of the radiation on the length of the fiber for an SMF with strong and weak anisotropy. In the case of anisotropic SMFs characterized by weak coupling of orthogonal modes, the results match those obtained previously by other calculation methods. The results for weakly anisotropic SMFsmore »

Control of subsynchronous resonant modes in a series compensated system through superconducting magnetic energy storage units
A simple and novel strategy for damping subsynchronous resonant oscillations through control of converter firing angles of a superconducting magnetic energy storage system (SMES) is proposed. The strategy is derived such that the current injected or drawn by the SMES compensates for any deviation in real and reactive power in the system. The proposed control has been tested on the IEEE second benchmark model for subsynchronous resonance studies. It has been found to eliminate the slowly growing transients resulting from the unstable modes very effectively. The control algorithm is simple and its realization will require very little hardware. 
Growth of ideal magnetohydrodynamic modes driven slowly through their instability threshold: Application to disruption precursors
The growth of an ideal magnetohydrodynamic (MHD) instability in a hightemperature plasma is calculated in the case where the plasma {beta} is driven slowly through its instability threshold. The MHD perturbation grows faster than exponentially, approximately as exp[(t/{tau}){sup 3/2}]. Its characteristic growth time {tau}{approximately}( (3) /(2) ){sup 2/3}{cflx {gamma}}{sub MHD}{sup {minus}2/3}{gamma}{sub h}{sup {minus}1/3} is a hybrid of the ideal MHD incremental growth rate {cflx {gamma}}{sub MHD} and the heating rate {gamma}{sub h}. This simple model agrees well with the observed growth of disruption precursors in high {beta} DIIID [J. L. Luxon and L. G. Davis, Fusion Technol. {bold 8}, 441more » 
Direct Observation of SpinTorque Driven Magnetization Reversal Through Nonuniform Modes
We present timeresolved xray images with 30 nm spatial and 70 ps temporal resolution, which reveal details of the spatially resolved magnetization evolution in nanoscale samples of various dimensions during reversible spintorque switching processes. Our data in conjunction with micromagnetic simulations suggest a simple unified picture of magnetic switching based on the motion of a magnetic vortex. With decreasing size of the magnetic element the path of the vortex core moves from inside to outside of the nanoelement, and the switching process evolves from a curled nonuniform to an increasingly uniform mode. 
Identical phosphatase mechanisms achieved through distinct modes of binding phosphoprotein substrate
Twocomponent signal transduction systems are widespread in prokaryotes and control numerous cellular processes. Extensive investigation of sensor kinase and response regulator proteins from many twocomponent systems has established conserved sequence, structural, and mechanistic features within each family. In contrast, the phosphatases which catalyze hydrolysis of the response regulator phosphoryl group to terminate signal transduction are poorly understood. Here we present structural and functional characterization of a representative of the CheC/CheX/FliY phosphatase family. The Xray crystal structure of Borrelia burgdorferi CheX complexed with its CheY3 substrate and the phosphoryl analogue BeF{sub 3}{sup } reveals a binding orientation between a response regulatormore »