1,138 research outputs found

    Spectrum of supersymmetric and bosonic open 2-branes

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    We consider both the supersymmetric open 2-brane and bosonic open 2-brane, their quantization and spectrum under the flat metric condition. The supersymmetric spectrum turns out to be discrete, while the spectrum of purely bosonic open 2-brane is shown to be devoid of any massless states.Comment: 8 pages, conferenc

    Asymmetric wave transmission through one dimensional lattices with cubic-quintic nonlinearity

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    One dimensional lattice with an on-site cubic-quintic nonlinear response described by a cubic-quintic discrete nonlinear Schr\"odinger equation is tested for asymmetric wave propagation. The lattice is connected to linear side chains. Asymmetry is introduced by breaking the mirror symmetry of the lattice with respect to the center of the nonlinear region. Three cases corresponding to dimer, trimer and quadrimer are discussed with focus on the corresponding diode-like effect. Transmission coefficients are analytically calculated for left and right moving waves via backward transfer map. The different transmission coefficients for the left and right moving waves impinging the lattice give rise to a diode-like effect which is tested for different variations in asymmetry and site dependent coefficients. We show that there is a higher transmission for incoming waves with lower wavenumbers as compared to the waves with comparatively larger wavenumbers and a diode-like effect improves by increasing the nonlinear layers. We also show that in the context of transport through such lattices, the cooperation between cubic and quintic nonlinear response is not "additive". Finally, we numerically analyse Gaussian wave packet dynamics impinging on the CQDNLS lattice for all three cases.Comment: 10 pages, 17 figure

    Two particle entanglement and its geometric duals

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    We show that for a system of two entangled particles, there is a dual description to the particle equations in terms of classical theory of conformally stretched spacetime. We also connect these entangled particle equations with Finsler geometry. We show that this duality translates strongly coupled quantum equations in the pilot-wave limit to weakly coupled geometric equations.Comment: 10pp, Typos corrected, Accepted versio

    Geometric Description of Schr\"{o}dinger Equation in Finsler and Funk Geometry

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    For a system of nn non-relativistic spinless bosons, we show by using a set of suitable matching conditions that the quantum equations in the pilot-wave limit can be translated into a geometric language for a Finslerian manifold. We further link these equations to Euclidean timelike relative Funk geometry and show that the two different metrics in both of these geometric frameworks lead to the same coupling.Comment: 9 pages, to appear in IJGMM

    Neurological Care in Pakistan: actions are needed

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    Present and future of neurology in pakistan

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    Neurology started as a department in early nineteen sixties in Dow Medical College and King Edward Medical College and initially having a separate department of neurology was not mandated in medical colleges by Pakistan Medical and Dental Council¹. Some neurology training programs do not give exposure to subspecialties and training is focused on adult neurology². From 2015 to 2016, several conferences were held on neurology including an Annual Meeting in Quetta, movement disorder conference in Lahore

    Plagiarism penalties

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    Research in all areas of sciences and humanities has led to the creation of a highly competitive environment which necessitates reporting of ideas, and discoveries at rapid pace. The emergence of new technologies of communication has significantly enhanced the capabilities of individuals to record and transcribe data at high speed. Even though, one can accumulate information in a fraction of time, but quite often the creative skills and ability to write one‘s own original thoughts do not match the required level of output. Writing ideas in one’s own words is not always easy and at times it becomes quite challenging particularly for those with limited command over the language. These situations often tempt a writer to look around easily available resources
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