Results 101 to 110 of about 700,670 (248)

Fatgraph expansion for noncritical superstrings [PDF]

, 2004
We study the fatgraph expansion for the Complex Matrix Quantum Mechanics (CMQM) with a Chern-Simons coupling. In the double-scaling limit this model is believed to describe Type 0A superstrings in 1+1 dimensions in a Ramond-Ramond electric field.
Kapustin, Anton, Murugan, Arvind
core   +1 more source

Critical Exponents for Diluted Resistor Networks

, 1998
An approach by Stephen is used to investigate the critical properties of randomly diluted resistor networks near the percolation threshold by means of renormalized field theory. We reformulate an existing field theory by Harris and Lubensky.
A. B. Harris, A. B. Harris, A. B. Harris, A. B. Harris, A. B. Harris, A. Bunde, A. L. Ephross, A. S. Skal, B. Fourcade, B. J. Last, B. Nienhuis, C. Dasgupta, C. M. Fortuin, D. B. Gingold, D. J. Amit, D. J. Amit, D. Stauffer, G. ’t Hooft, H. K. Janssen, H. K. Janssen, J. P. Straley, J. P. Straley, J. Zinn-Justin, K. Oerding, L. de Arcangelis, M. J. Stephen, M. Mezard, M. P. M. den Nijs, N. Breuer, O. Stenull, P. G. de Gennes, P. N. Strenski, P. W. Kasteleyn, R. Blumenfeld, R. K. P. Zia, R. Rammal, S. Alexander, S. John, S. John, T. C. Lubensky, T. C. Lubensky, Y. Park   +41 more
core   +1 more source

Measure‐valued processes for energy markets

Mathematical Finance, Volume 35, Issue 2, Page 520-566, April 2025.
Abstract We introduce a framework that allows to employ (non‐negative) measure‐valued processes for energy market modeling, in particular for electricity and gas futures. Interpreting the process' spatial structure as time to maturity, we show how the Heath–Jarrow–Morton approach can be translated to this framework, thus guaranteeing arbitrage free ...
Christa Cuchiero, Luca Di Persio, Francesco Guida, Sara Svaluto‐Ferro   +3 more
wiley   +1 more source

Feynman Diagrams

11 pages, invited article for the Encyclopedia of Particle Physics.
openaire   +3 more sources

Topologically distinct Feynman diagrams for mass operator in electron-phonon interaction

Condensed Matter Physics, 2009
The new method for designing topologically distinct Feynman diagrams for electron's mass operator in electron-phonon interaction is developed using the permutation group theory.
C.C. Tovstyuk
doaj   +1 more source

Goldstone equivalence and high energy electroweak physics

SciPost Physics, 2020
The transition between the broken and unbroken phases of massive gauge theories, namely the rearrangement of longitudinal and Goldstone degrees of freedom that occurs at high energy, is not manifestly smooth in the standard formalism.
Gabriel Cuomo, Luca Vecchi, Andrea Wulzer
doaj   +1 more source

Three-loop Correction to the Instanton Density. I. The Quartic Double Well Potential

, 2015
This paper deals with quantum fluctuations near the classical instanton configuration. Feynman diagrams in the instanton background are used for the calculation of the tunneling amplitude (the instanton density) in the three-loop order for quartic double-
Escobar-Ruiz, M. A., Shuryak, E., Turbiner, A. V.   +2 more
core   +1 more source

Reinforcement Learning for Jump‐Diffusions, With Financial Applications

Mathematical Finance, EarlyView.
ABSTRACT We study continuous‐time reinforcement learning (RL) for stochastic control in which system dynamics are governed by jump‐diffusion processes. We formulate an entropy‐regularized exploratory control problem with stochastic policies to capture the exploration–exploitation balance essential for RL.
Xuefeng Gao, Lingfei Li, Xun Yu Zhou
wiley   +1 more source

Vanishing Cycles and Analysis of Singularities of Feynman Diagrams

Mathematics
In this work, we analyze the vanishing cycles of Feynman loop integrals by the means of the Mayer–Vietoris spectral sequence. A complete classification of possible vanishing geometries is obtained.
Stanislav Srednyak, Vladimir Khachatryan
doaj   +1 more source

The diamond rule for multi-loop Feynman diagrams

Physics Letters B, 2015
An important aspect of improving perturbative predictions in high energy physics is efficiently reducing dimensionally regularised Feynman integrals through integration by parts (IBP) relations.
B. Ruijl, T. Ueda, J.A.M. Vermaseren
doaj   +1 more source