Operator expression for the Koba and Nielsen multi-veneziano formula and gauge identities

1970 ◽  
Vol 21 (1) ◽  
pp. 192-204 ◽  
Author(s):  
J Gervais
Keyword(s):  
Operator Expression ◽  
Veneziano Formula

Veneziano Formula with Trajectories Spaced by Two Units

1968 ◽  
Vol 21 (25) ◽  
pp. 1724-1728 ◽  
Author(s):  
Stanley Mandelstam
Keyword(s):  
Veneziano Formula

scholarly journals Spin-Matrix Polynomials and the Veneziano Formula

1969 ◽  
Vol 184 (5) ◽  
pp. 1954-1955 ◽  
Author(s):  
T. J. Nelson
Keyword(s):  
Matrix Polynomials ◽  
Veneziano Formula

Veneziano formula for compton scattering of pions

1969 ◽  
Vol 1 (12) ◽  
pp. 568-570
Author(s):  
C. A. Ferrari ◽  
A. H. Zimerman
Keyword(s):  
Compton Scattering ◽  
Veneziano Formula

scholarly journals The spin Drude weight of the XXZ chain and generalized hydrodynamics

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Andrew Urichuk ◽  
Yahya Oez ◽  
Andreas Klümper ◽  
Jesko Sirker
Keyword(s):  
Free Energy ◽  
Spin Current ◽  
Proper Treatment ◽  
Operator Expression ◽  
Expectation Value ◽  
Generalized Hydrodynamics ◽  
Xxz Chain ◽  
Matrix Eigenvalues ◽  
Drude Weight ◽  
The One

Based on a generalized free energy we derive exact thermodynamic Bethe ansatz formulas for the expectation value of the spin current, the spin current-charge, charge-charge correlators, and consequently the Drude weight. These formulas agree with recent conjectures within the generalized hydrodynamics formalism. They follow, however, directly from a proper treatment of the operator expression of the spin current. The result for the Drude weight is identical to the one obtained 20 years ago based on the Kohn formula and TBA. We numerically evaluate the Drude weight for anisotropies \Delta=\cos(\gamma)Δ=cos(γ) with \gamma = \pi n/mγ=πn/m, n\leq mn≤m integer and coprime. We prove, furthermore, that the high-temperature asymptotics for general \gamma=\pi n/mγ=πn/m—obtained by analysis of the quantum transfer matrix eigenvalues—agrees with the bound which has been obtained by the construction of quasi-local charges.

scholarly journals Spectrums of Solvable Pantograph Differential-Operators for First Order

2014 ◽  
Vol 2014 ◽  
pp. 1-8 ◽  
Author(s):  
Z. I. Ismailov ◽  
P. Ipek
Keyword(s):  
Hilbert Space ◽  
Differential Operator ◽  
Operator Theory ◽  
Differential Operators ◽  
Finite Interval ◽  
Exact Formula ◽  
Operator Expression ◽  
Minimal Operator ◽  
First Order ◽  
Delay Differential

By using the methods of operator theory, all solvable extensions of minimal operator generated by first order pantograph-type delay differential-operator expression in the Hilbert space of vector-functions on finite interval have been considered. As a result, the exact formula for the spectrums of these extensions is presented. Applications of obtained results to the concrete models are illustrated.

Complex-l-Plane Singularities in the Veneziano Formula

1969 ◽  
Vol 181 (5) ◽  
pp. 2095-2097 ◽  
Author(s):  
Francesco Drago ◽  
Satoshi Matsuda
Keyword(s):  
Veneziano Formula
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