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Articles 1  30 of 33
FullText Articles in Physics
Call For Abstracts  Resrb 2019, July 89, Wrocław, Poland, Wojciech M. Budzianowski
Call For Abstracts  Resrb 2019, July 89, Wrocław, Poland, Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
A Companion To The Introduction To Modern Dynamics, David D. Nolte
A Companion To The Introduction To Modern Dynamics, David D. Nolte
David D Nolte
Mach’S Principle In A Mixed NewtonEinstein Context, Evert Jan Post, Michael Berg
Mach’S Principle In A Mixed NewtonEinstein Context, Evert Jan Post, Michael Berg
Michael Berg
A closed physical space, in conjunction with scalar versus pseudo scalar distinctions, and an accordingly adapted Gauss theorem, reveal unexpected perspectives on Mach's principle, the massenergy theorem, and a bonus insight into the nature of the solutions of the Einstein field equations of gravity.
On LeviCivita’S Alternating Symbol, Schouten’S Alternating Unit Tensors, Cpt, And Quantization, Evert Jan Post, Stan Sholar, Hooman Rahimizadeh, Michael Berg
On LeviCivita’S Alternating Symbol, Schouten’S Alternating Unit Tensors, Cpt, And Quantization, Evert Jan Post, Stan Sholar, Hooman Rahimizadeh, Michael Berg
Michael Berg
The purpose of the present article is to demonstrate that by adopting a unifying differential geometric perspective on certain themes in physics one reaps remarkable new dividends in both microscopic and macroscopic domains. By replacing algebraic objects by tensortransforming objects and introducing methods from the theory of differentiable manifolds at a very fundamental level we obtain a KottlerCartan metricindependent general invariance of the Maxwell field, which in turn makes for a global quantum superstructure for GaussAmp`ere and AharonovBohm “quantum integrals.” Beyond this, our approach shows that postulating a Riemannian metric at the quantum level is an unnecessary concept and ...
Exotic Statistics For Strings In 4d Bf Theory, John C. Baez, Derek K. Wise, Alissa S. Crans
Exotic Statistics For Strings In 4d Bf Theory, John C. Baez, Derek K. Wise, Alissa S. Crans
Alissa Crans
After a review of exotic statistics for point particles in 3d BF theory, and especially 3d quantum gravity, we show that stringlike defects in 4d BF theory obey exotic statistics governed by the 'loop braid group'. This group has a set of generators that switch two strings just as one would normally switch point particles, but also a set of generators that switch two strings by passing one through the other. The first set generates a copy of the symmetric group, while the second generates a copy of the braid group. Thanks to recent work of XiaoSong Lin, we can ...
Interplay Between Anomalous Transport And Catalytic Reaction Kinetics In SingleFile Nanoporous Systems, Dajiang Liu, Jigang Wang, David Ackerman, Igor I. Slowing, Marek Pruski, HungTing Chen, Victor S.Y. Lin, James W. Evans
Interplay Between Anomalous Transport And Catalytic Reaction Kinetics In SingleFile Nanoporous Systems, Dajiang Liu, Jigang Wang, David Ackerman, Igor I. Slowing, Marek Pruski, HungTing Chen, Victor S.Y. Lin, James W. Evans
Jigang Wang
Functionalized nanoporous materials have broad utility for catalysis applications. However, the kinetics of catalytic reaction processes in these systems can be strongly impacted by the anomalous transport. The most extreme case corresponds to singlefile diffusion for narrow pores in which species cannot pass each other. For conversion reactions with a singlefile constraint, traditional meanfieldtype reactiondiffusion equations fail to capture the initial evolution of concentration profiles, and they cannot describe the scaling behavior of steadystate reactivity. Hydrodynamic reactiondiffusion equations accounting for the singlefile aspects of chemical diffusion can describe such initial evolution, but additional refinements are needed to incorporate fluctuation effects ...
Conventions, Definitions, Identities, And Other Useful Formulae, Robert Mcnees
Conventions, Definitions, Identities, And Other Useful Formulae, Robert Mcnees
Robert A McNees IV
As the name suggests, these notes contain a summary of important conventions, definitions, identities, and various formulas that I often refer to. They may prove useful for researchers working in General Relativity, Supergravity, String Theory, Cosmology, and related areas.
Zespół Energii Odnawialnej I Zrównoważonego Rozwoju (Eozr), Wojciech M. Budzianowski
Zespół Energii Odnawialnej I Zrównoważonego Rozwoju (Eozr), Wojciech M. Budzianowski
Wojciech Budzianowski
No abstract provided.
Spontaneous Oscillations In Simple Fluid Networks, Nathaniel Karst, Brian Storey, John Geddes
Spontaneous Oscillations In Simple Fluid Networks, Nathaniel Karst, Brian Storey, John Geddes
Brian Storey
Nonlinear phenomena including multiple equilibria and spontaneous oscillations are common in ﬂuid networks containing either multiple phases or constituents. In many systems, such behavior might be attributed to the complicated geometry of the network, the complex rheology of the constituent ﬂuids, or, in the case of microvascular blood ﬂow, biological control. In this paper we investigate two examples of a simple threenode ﬂuid network containing two miscible Newtonian ﬂuids of diﬀering viscosities, the ﬁrst modeling microvascular blood ﬂow and the second modeling stratiﬁed laminar ﬂow. We use a combination of analytic and numerical techniques to identify and track saddlenode and ...
Spontaneous Oscillations In Simple Fluid Networks, Nathaniel Karst, Brian Storey, John Geddes
Spontaneous Oscillations In Simple Fluid Networks, Nathaniel Karst, Brian Storey, John Geddes
John B. Geddes
Nonlinear phenomena including multiple equilibria and spontaneous oscillations are common in ﬂuid networks containing either multiple phases or constituents. In many systems, such behavior might be attributed to the complicated geometry of the network, the complex rheology of the constituent ﬂuids, or, in the case of microvascular blood ﬂow, biological control. In this paper we investigate two examples of a simple threenode ﬂuid network containing two miscible Newtonian ﬂuids of diﬀering viscosities, the ﬁrst modeling microvascular blood ﬂow and the second modeling stratiﬁed laminar ﬂow. We use a combination of analytic and numerical techniques to identify and track saddlenode and ...
Composite Fermions And Integer Partitions, Arthur Benjamin, Jennifer Quinn, John Quinn, Arkadiusz Wojs
Composite Fermions And Integer Partitions, Arthur Benjamin, Jennifer Quinn, John Quinn, Arkadiusz Wojs
Jennifer J. Quinn
We utilize the KOH theorem to prove the unimodality of integer partitions with at most a parts, all parts less than or equal to b, that are required to contain either repeated or consecutive parts. We connect this result to an open question in quantum physics relating the number of distinct total angular momentum multiplets of a system of N fermions, each with angular momentum ℓ, to those of a system in which each Fermion has angular momentum ℓ*=ℓ−N+1.
Transformation Of Statistics In Fractional Quantum Hall Systems, John J. Quinn, Arkadiusz Wojs, Jennifer J. Quinn, Arthur T. Benjamin
Transformation Of Statistics In Fractional Quantum Hall Systems, John J. Quinn, Arkadiusz Wojs, Jennifer J. Quinn, Arthur T. Benjamin
Jennifer J. Quinn
A Fermion to Boson transformation is accomplished by attaching to each Fermion a tube carrying a single quantum of flux oriented opposite to the applied magnetic field. When the mean field approximation is made in Haldane’s spherical geometry, the Fermion angular momentum lF is replaced by lB =lF − 1/2 (N −1). The set of allowed total angular momentum multiplets is identical in the two different pictures. The Fermion and Boson energy spectra in the presence of many body interactions are identical only if the pseudopotential V (interaction energy as a function of pair angular momentum L12) increases as ...
Syllabus_Lecture_Notes_Collective_Phenomena_In_Laser_Plasmas_Ii_Phy998_Spring_2014, Serge Y. Kalmykov
Syllabus_Lecture_Notes_Collective_Phenomena_In_Laser_Plasmas_Ii_Phy998_Spring_2014, Serge Y. Kalmykov
Serge Youri Kalmykov
Highpower laser radiation beams interacting with a rarefied, fully ionized plasmas are essentially unstable. This fact is mainly due to the excitation of various modes of plasma oscillations, most important of which are electron Langmuir waves and ion acoustic waves. The stimulated scattering processes destroy and deplete the pulse in the as it propagates. On the other hand, at the moderate level of instability, spectral properties of the scattered light may serve as optical diagnostics of the pulse propagation dynamics. Knowing the dynamics of the stimulated scattering processes is thus essential for such applications as inertial confinement fusion and laserplasma ...
On Random Time And On The Relation Between Wave And Telegraph Equations, Ramakrishna Janaswamy
On Random Time And On The Relation Between Wave And Telegraph Equations, Ramakrishna Janaswamy
Ramakrishna Janaswamy
Kac’s conjecture relating the solution of wave and telegraph equations in higher dimensions through a Poisson processdriven random time is established through the concepts of stochastic calculus. New expression is derived for the probability density function of the random time. We demonstrate how the relationship between the solution of a lossy wave and that of a lossless wave equation can be exploited to derive some statistical identities. Relevance of the results presented to the study of pulse propagation in a dispersive medium characterized by a Lorentz or Drude model is discussed and new evolution equations for 2D Maxwell’s ...
Electrical Current In Sinai Billiards Under General Small Forces, Pengfei Zhang
Electrical Current In Sinai Billiards Under General Small Forces, Pengfei Zhang
Pengfei Zhang
No abstract provided.
Determination Of Kinetic Parameters From The Thermogravimetric Data Set Of Biomass Samples, Karol Postawa, Wojciech M. Budzianowski
Determination Of Kinetic Parameters From The Thermogravimetric Data Set Of Biomass Samples, Karol Postawa, Wojciech M. Budzianowski
Wojciech Budzianowski
This article describes methods of the determination of kinetic parameters from the thermogravimetric data set of biomass samples. It presents the methodology of the research, description of the needed equipment, and the method of analysis of thermogravimetric data. It describes both methodology of obtaining quantitative data such as kinetic parameters as well as of obtaining qualitative data like the composition of biomass. The study is focused mainly on plant biomass because it is easy in harvesting and preparation. Methodology is shown on the sample containing corn stover which is subsequently pyrolysed. The investigated sample show the kinetic of first order ...
Average Output Entropy For Quantum Channels, Christopher King, David K. Moser
Average Output Entropy For Quantum Channels, Christopher King, David K. Moser
Christopher King
We study the regularized average Renyi output entropy r reg of quantum channels. This quantity gives information about the average noisiness of the channel output arising from a typical, highly entangled input state in the limit of infinite dimensions. We find a closed expression for βr reg , a quantity which we conjecture to be equal to r reg . We find an explicit form for βr reg for some entanglementbreaking channels and also for the qubit depolarizing channel Δλ as a function of the parameter λ. We prove equality of the two quantities in some cases, in particular, we conclude that ...
On The Influence Of Damping In Hyperbolic Equations With Parabolic Degeneracy, Ralph Saxton, Katarzyna Saxton
On The Influence Of Damping In Hyperbolic Equations With Parabolic Degeneracy, Ralph Saxton, Katarzyna Saxton
Ralph Saxton
This paper examines the effect of damping on a nonstrictly hyperbolic 2x2 system. It is shown that the growth of singularities is not restricted as in the strictly hyperbolic case where dissipation can be strong enough to preserve the smoothness of solutions globally in time. Here, irrespective of the stabilizing properties of damping, solutions are found to break down in finite time on a line where two eigenvalues coincide in state space.
Nonlinear Waves And Solitons On Contours And Closed Surfaces, Andrei Ludu
Nonlinear Waves And Solitons On Contours And Closed Surfaces, Andrei Ludu
Andrei Ludu
No abstract provided.
Hydrogen Production From Biogas By OxyReforming: Reaction System Analysis, Aleksandra Terlecka, Wojciech M. Budzianowski
Hydrogen Production From Biogas By OxyReforming: Reaction System Analysis, Aleksandra Terlecka, Wojciech M. Budzianowski
Wojciech Budzianowski
Oxyreforming is emerging as an interesting alternative to conventional methods of hydrogen generation. The current article characterises this process through analysis of individual reactions: SMR (steam methane reforming), WGS (water gas shift) and CPO (catalytic partial oxidation). Analyses relate to optimisation of thermal conditions thus enabling costeffectivenes of the process.
Boundary Effects In LargeAspectRatio Lasers, G.K. Harkness, W.J. Firth, John B. Geddes, J.V Moloney, E.M. Wright
Boundary Effects In LargeAspectRatio Lasers, G.K. Harkness, W.J. Firth, John B. Geddes, J.V Moloney, E.M. Wright
John B. Geddes
We study theoretically the effect of transverse boundary conditions on the traveling waves foundin infinitely extended and positively detuned laser systems. We find that for largeaspectratiosystems, well above threshold and away from the boundaries, the traveling waves persist. Sourceand sink defects are observed on the boundaries, and in verylargeaspectratio systems these defectscan also exist away from the boundaries. The transverse size of the sink defect, relative to the sizeof the transverse domain, is important in determining the final pattern observed, and so, close tothreshold, standing waves are always observed.
Fractional Trigonometric Functions In ComplexValued Space: Applications Of Complex Number To Local Fractional Calculus Of Complex Function, Yang XiaoJun
XiaoJun Yang
This paper presents the fractional trigonometric functions in complexvalued space and proposes a short outline of local fractional calculus of complex function in fractal spaces.
Transitional Probabilities For The FourState Random Walk On A Lattice In The Presence Of Partially Reflecting Boundaries, Ramakrishna Janaswamy
Transitional Probabilities For The FourState Random Walk On A Lattice In The Presence Of Partially Reflecting Boundaries, Ramakrishna Janaswamy
Ramakrishna Janaswamy
The fourstate random walk (4RW) model, wherein the particle is endowed with two states of spin and two states of directional motion in each space coordinate, permits a stochastic solution of the Schrödinger equation (or the equivalent parabolic equation) without resorting to the usual analytical continuation in complex space of the particle trajectories. Analytical expressions are derived here for the various transitional probabilities in a 4RW by employing generating functions and eigenfunction expansions when the particle moves on a 1+1 spacetime lattice with twopoint boundary conditions. The most general case of dissimilar boundaries with partially reflecting boundary conditions is ...
Problems Of Local Fractional Definite Integral Of The OneVariable NonDifferentiable Function, Yang XiaoJun
Problems Of Local Fractional Definite Integral Of The OneVariable NonDifferentiable Function, Yang XiaoJun
XiaoJun Yang
It is proposed that local fractional calculas introduced by Kolwankar and Gangal is extended by the concept of Jumarie’s fractional calculus and local fractional definite integral is redefined. The properties and the theorems of local fractional calculus are discussed in this paper.
Thermal Roots Of CorrelationBased Complexity, Philip Fraundorf
Thermal Roots Of CorrelationBased Complexity, Philip Fraundorf
Phil Fraundorf
Analysis And Classification Of Nonlinear Dispersive Evolution Equations In The Potential Representation, Andrei Ludu
Analysis And Classification Of Nonlinear Dispersive Evolution Equations In The Potential Representation, Andrei Ludu
Andrei Ludu
No abstract provided.
Topology And Metastability In The Lattice Skyrme Model, Alec Schramm, Benjamin Svetitsky
Topology And Metastability In The Lattice Skyrme Model, Alec Schramm, Benjamin Svetitsky
Alec J Schramm
We offer the Skyrme model on a lattice as an effective field theory—fully quantized—of baryonmeson interactions at temperatures below the chiral phase transition. We define a local topological density that involves the volumes of tetrahedra in the target space S3 and we make use of Coxeter’s formula for the Schläfli function to implement it. This permits us to calculate the meansquare radius of a Skyrmion in the threedimensional lattice Skyrme model, which may be viewed as a GinzburgLandau effective theory for the full quantum theory at finite temperature. We find that, contrary to expectations, the Skyrmion shrinks ...
A Nonlinear Deformed Su(2) Algebra With A TwoColor Quasitriangular Hopf Structure, Andrei Ludu
A Nonlinear Deformed Su(2) Algebra With A TwoColor Quasitriangular Hopf Structure, Andrei Ludu
Andrei Ludu
No abstract provided.
Su(1,1) Algebraic Description Of OneDimensional Potentials Within The RMatrix Theory, Andrei Ludu
Su(1,1) Algebraic Description Of OneDimensional Potentials Within The RMatrix Theory, Andrei Ludu
Andrei Ludu
No abstract provided.
Generalization Kdv Equation For Fluid Dynamics And Quantum Algebras, Andrei Ludu
Generalization Kdv Equation For Fluid Dynamics And Quantum Algebras, Andrei Ludu
Andrei Ludu
No abstract provided.