Search results for "General algorithm"

showing 2 items of 2 documents

Ricci-Based Gravity theories and their impact on Maxwell and nonlinear electromagnetic models

2019

Abstract We extend the correspondence between metric-affine Ricci-Based Gravity the- ories and General Relativity (GR) to the case in which the matter sector is represented by linear and nonlinear electromagnetic fields. This complements previous studies focused on fluids and scalar fields. We establish the general algorithm that relates the matter fields in the GR and RBG frames and consider some applications. In particular, we find that the so-called Eddington-inspired Born-Infeld gravity theory coupled to Maxwell electromag- netism is in direct correspondence with GR coupled to Born-Infeld electromagnetism. We comment on the potential phenomenological implications of this relation.

High Energy Physics - TheoryElectromagnetic fieldPhysicsNuclear and High Energy PhysicsGravity (chemistry)010308 nuclear & particles physicsGeneral relativityScalar (physics)FOS: Physical sciencesGeneral Relativity and Quantum Cosmology (gr-qc)01 natural sciencesGeneral Relativity and Quantum CosmologyNonlinear systemTheoretical physicsHigh Energy Physics - Theory (hep-th)Electromagnetism0103 physical sciencesBeyond Standard Modellcsh:QC770-798lcsh:Nuclear and particle physics. Atomic energy. RadioactivityElectromagnetic model010306 general physicsClassical Theories of GravityGeneral algorithmJournal of High Energy Physics
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Transport Properties of Correlated Electrons in High Dimensions

2003

We develop a new general algorithm for finding a regular tight-binding lattice Hamiltonian in infinite dimensions for an arbitrary given shape of the density of states (DOS). The availability of such an algorithm is essential for the investigation of broken-symmetry phases of interacting electron systems and for the computation of transport properties within the dynamical mean-field theory (DMFT). The algorithm enables us to calculate the optical conductivity fully consistently on a regular lattice, e.g., for the semi-elliptical (Bethe) DOS. We discuss the relevant f-sum rule and present numerical results obtained using quantum Monte Carlo techniques.

Physicssymbols.namesakeLattice (order)Quantum mechanicsQuantum Monte CarloComputationDensity of statessymbolsElectronHamiltonian (quantum mechanics)Optical conductivityGeneral algorithm
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