Browsing by Keywords "Physics"
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Active physics
(It's About Time, 2016) 
Antide sitterwave solutions of higher derivative theories
(American Physical Society, 2013)We show that the recently found antide Sitter (AdS)plane and AdSspherical wave solutions of quadratic curvature gravity also solve the most general higher derivative theory in D dimensions. More generally, we show that ... 
Archimedes' principle as an application of the divergence theorem
(Institute of Electrical and Electronics Engineers, 1990)A derivation is provided that allows one to obtain Archimedes' principle as an application of the divergence theorem. 
Beaming of light and enhanced transmission via surface modes of photonic crystals
(Optical Society of America, 20051115)We report beaming and enhanced transmission of electromagnetic waves by use of surface corrugated photonic crystals. The modes of a finitesize photonic crystal composed of dielectric rods in free space have been analyzed ... 
Conductance of ferromagnetic nanowires
(American Physical Society, 1998)The conductance distribution obtained from an ensemble of stretching ferromagnetic nanowires or point contacts do not exhibit peaks near the integer multiples of 2e2/h. This observation has been interpreted as the absence ... 
Diodelike asymmetric transmission of linearly polarized waves using magnetoelectric coupling and electromagnetic wave tunneling
(American Physical Society, 20120524)An asymmetric, reciprocal, diffractionfree transmission of linearly polarized waves in a new diodelike, threelayer, ultrathin, chiral structure is studied theoretically and experimentally. The exploited physical mechanism ... 
Effective mass calculations for twodimensional gas of dipolar fermions
(Springer New York LLC, 2017)We consider a twodimensional system of ultracold dipolar fermions with dipole moments aligned in the perpendicular direction. We use the static structure factor information from FermiHypernettedChain calculations to ... 
Exohydrogenated singlewall carbon nanotubes
(American Physical Society, 2001)An extensive firstprinciples study of fully exohydrogenated zigzag (n,0) and armchair (n,n) singlewall carbon nanotubes (CnHn), polyhedral molecules including cubane, dodecahedrane, and C60H60 points to crucial differences ... 
Firstprinciples investigation of structural and electronic properties of solid cubane and its doped derivatives
(American Physical Society, 2000)The electronic and structural properties of molecular and solid cubane have been studied by firstprinciples, selfconsistent field total energy calculations. Calculated molecular properties such as equilibrium geometry ... 
Firstprinciples study of the iron pnictide superconductor BaFe2 As2
(American Physical Society, 2009)This paper presents our study on the atomic, electronic, magnetic structures, and phonon modes of the lowtemperature orthorhombic phase of undoped BaFe2As2 crystal. The electronic structure is characterized by a sharp ... 
Inflation and inflation uncertainty: a dynamic framework
(Elsevier BV, 2012)This paper aims to investigate the direct relationship between inflation and inflation uncertainty by employing a dynamic method for the monthly countryregionplace United States data for the time period 19762007. While ... 
A measurable force driven by an excitonic condensate
(American Institute of Physics Inc., 2014)Free energy signatures related to the measurement of an emergent force (≈109N) due to the exciton condensate (EC) in Double Quantum Wells are predicted and experiments are proposed to measure the effects. The ECforce is ... 
Metalinsulator transition induced by random dipoles
(American Physical Society, 2013)We study the localization properties of a test dipole feeling the disordered potential induced by dipolar impurities trapped at random positions in an optical lattice. This random potential is marked by correlations which ... 
Nonequilibrium fractional Hall response after a topological quench
(American Physical Society, 2016)We theoretically study the Hall response of a lattice system following a quench where the topology of a filled band is suddenly changed. In the limit where the physics is dominated by a single Dirac cone, we find that the ... 
ODTü Fizik Bölümü Tarihi
(Bilkent University, 2018)Orta Doğu Teknik üniversitesi 15 Kasım 1956 tarihinde Orta Doğu Yüksek Teknoloji Enstitüsü adı altında kuruldu. ODTü Fizik Bölümü ise 1960 yılında kurulmuştur. Bu çalışmada bölümün kuruluşundan itibaren öğretim üyeleri, ... 
On existence of an xintegral for a semidiscrete chain of hyperbolic type
(Institute of Physics Publishing, 2016)A class of semidiscrete chains of the form t1x = f (x,t,t1,tx) is considered. For the given chains easily verifiable conditions for existence of xintegral of minimal order 4 are obtained. © Published under licence by IOP ... 
On the stabilization of periodic orbits for discrete time chaotic systems
(Elsevier, 200502)In this Letter we consider the stabilization problem of unstable periodic orbits of discrete time chaotic systems. We propose a novel and simple periodic delayed feedback law and present some stability results. These results ... 
Pentagonal nanowires: a firstprinciples study of the atomic and electronic structure
(American Physical Society, 2002)We performed an extensive firstprinciples study of nanowires in various pentagonal structures by using pseudopotential plane wave method within the density functional theory. Our results show that nanowires of different ... 
The power of physical representations
(AAAI Press, 1989)Commonsense reasoning about the physical world, as exemplified by 'Iron sinks in water' or 'If a ball is dropped it gains speed,' will be indispensable in future programs. We argue that to make such predictions (namely, ... 
Reversible bandgap engineering in carbon nanotubes by radial deformation
(American Physical Society, 200203)We present a systematic analysis of the effect of radial deformation on the atomic and electronic structure of zigzag and armchair single wall carbon nanotubes using the firstprinciple plane wave method. The nanotubes ...