Disintegration and expansion of wormholes

Новиков, И. Д.; Novikov, D. I.; Repin, Sergey

doi:10.1103/physrevd.102.124073

Cited by 17 publications

(28 citation statements)

References 13 publications

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“…(3.5): This result is the same as that for the (inverse) shear viscosity of a single-band 2D FL. 38 Strictly speaking, the forward-scattering approximation is not valid for large momentum transfers (q ≈ 2p F ), but the scaling form in Eq. (3.15) remains correct even beyond this approximation.…”

Section: A Electrical Conductivitymentioning

confidence: 99%

Lorentz ratio of a compensated metal

Maslov

2018

Phys. Rev. B

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A violation of the Wiedemann-Franz law in a metal can be quantified by comparing the Lorentz ratio, L = κρ/T , where κ is the thermal conductivity and ρ is the electrical resistivity, with the universal Sommerfeld constant, L0 = (π 2 /3)(kB/e) 2 . We obtain the Lorentz ratio of a clean compensated metal with intercarrier interaction as the dominant scattering mechanism by solving exactly the system of coupled integral Boltzmann equations. The Lorentz ratio is shown to assume a particular simple form in the forward-scattering limit: L/L0 = Θ 2 /2, where Θ is the scattering angle. In this limit, L/L0 can be arbitrarily small. We also show how the same result can be obtained without the benefit of an exact solution. We discuss how a strong downward violation of the Wiedemann-Franz law in a type-II Weyl semimetal WP2 can be explained within our model.

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Section: A Electrical Conductivitymentioning

confidence: 99%

Lorentz ratio of a compensated metal

Maslov

2018

Phys. Rev. B

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“…We found the a12m310 fit to both the pion and kaon gluon PDF to have very stable quality with χ 2 /dof around 1 with consistent output of f g (x, µ), regardless of the choice of the maximum value of the Wilson-line displacement z. However, for the a15m310 ensemble, χ 2 /dof can go as large as 9 (3). By reducing the fitted z to smaller number z = 1, χ 2 /dof can be reduced to 5 (3).…”

Section: Kaon Gluon Pdfs From the Pseudo-pdf Methodsmentioning

confidence: 76%

“…Since the gluon field is responsible for almost all of the pion's mass, studying the gluon PDFs of mesons would be very valuable in understanding the structure of mesons. There have been a number of attempts to extract pion gluon PDFs [1][2][3][4], but not much progress has been made on the kaon PDFs. The future experimental studies, for example, U.S.-based Electron-Ion Collider (EIC) [5,6], the Electron-Ion Collider in China (EicC) [7], the Drell-Yan and J/ψ-production experiments COMPASS++/AMBER [8] in Europe will aim at improving our knowledge of both the pion and kaon gluon and quark PDFs.…”

Section: Introductionmentioning

confidence: 99%

First Glimpse into the Kaon Gluon Parton Distribution Using Lattice QCD

Salas-Chavira¹,

Fan²,

Lin³

2021

Preprint

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In this work, we present the first results on the gluon parton distribution of the kaon from lattice quantum chromodynamics. We carry out the lattice calculation at pion mass around 310 MeV and two lattice spacings, 0.15 and 0.12 fm, using 2 + 1 + 1-flavor HISQ ensembles generated by MILC Collaboration. The kaon correlators are calculated using clover fermions and momentumsmearing sources with maximum boost momentum around 2 GeV and high statistics (up to 324,000 measurements). We study the dependence of the resulting reduced Ioffe-time pseudo-distributions at multiple boost momenta and lattice spacings. We then extract the kaon gluon distribution function in the MS scheme at µ = 2 GeV, neglecting the mixing between the gluon and singlet-quark sectors. Our results at the smaller lattice spacing are consistent with phenomenological determinations.

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“…Below we perform a calculation of the distribution function corrections f 1 and f 2 from Eqs. ( 49) and (50) in the interval of angles 0 < ϕ < π/2 [see the trajectory r + (t) on the Fig. 1(a) in the main text].…”

Section: Details Of Calculations Of Magnetoresistancementioning

confidence: 99%

A classical mechanism for negative magnetoresistance in two-dimensional systems in the ballistic regime

Alekseev,

Semina

2018

Preprint

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In ultra-high quality two-dimensional (2D) materials the mean free paths of phonons and electrons relative to all mechanisms of scattering can be much greater than a size of a sample. In this case the most intensive type of scattering of particles is their collisions with sample edges and the ballistic regime of heat and charge transport is realized. We study the ballistic transport of classical interacting 2D particles in a long narrow sample. We show that the inter-particle scattering conserving momentum leads to a positive hydrodynamic correction to the ballistic conductance, which is a precursor of the viscous Poiseuille flow. We examine the effect of weak magnetic field on the electron ballistic conductance and predict a novel classical ballistic mechanism for negative magnetoresistance. Our analysis demonstrates that, apparently, such mechanism explains the temperature-independent part of the giant negative magnetoresistance recently observed in the ultra-high mobility GaAs quantum wells.

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Disintegration and expansion of wormholes

Cited by 17 publications

References 13 publications

Lorentz ratio of a compensated metal

Lorentz ratio of a compensated metal

First Glimpse into the Kaon Gluon Parton Distribution Using Lattice QCD

A classical mechanism for negative magnetoresistance in two-dimensional systems in the ballistic regime

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