Results 1 to 10 of about 3,926 (245)

The topographic bias in Stokes’ formula vs. the error of analytical continuation by an Earth Gravitational Model - are they the same?

open access: yesJournal of Geodetic Science, 2015
Geoid determination below the topographic surface in continental areas using analytical continuation of gravity anomaly and/or an external type of solid spherical harmonics determined by an Earth GravitationalModel (EGM) inevitably leads to a topographic
Sjöberg L. E.
doaj   +3 more sources

On the analytical continuation of lattice Liouville theory

open access: yesJournal of High Energy Physics, 2023
The path integral of Liouville theory is well understood only when the central charge c ∈ [25, ∞). Here, we study the analytical continuation the lattice Liouville path integral to generic values of c, with a particular focus on the vicinity of c ...
Xiangyu Cao   +2 more
doaj   +2 more sources

Nevanlinna Analytical Continuation [PDF]

open access: yesPhysical Review Letters, 2021
Simulations of finite temperature quantum systems provide imaginary frequency Green's functions that correspond one-to-one to experimentally measurable real-frequency spectral functions. However, due to the bad conditioning of the continuation transform from imaginary to real frequencies, established methods tend to either wash out spectral features at
Jiani Fei, Chia-Nan Yeh, Emanuel Gull
openaire   +3 more sources

Learned optimizers for analytic continuation [PDF]

open access: yesPhysical Review B, 2022
11 pages, 7 figures, 6 ...
Dongchen Huang, Yi-feng Yang
openaire   +2 more sources

The RVP Method—From Real Ab-Initio Calculations to Complex Energies and Transition Dipoles

open access: yesFrontiers in Physics, 2022
The purpose of this review is to describe the rationale behind the RVP (resonance via Padé) approach for calculating energies and widths of resonances, while emphasizing a solid mathematical ground.
Arie Landau   +4 more
doaj   +1 more source

Relating a System’s Hamiltonian to Its Entropy Production Using a Complex Time Approach

open access: yesEntropy, 2023
We exploit the properties of complex time to obtain an analytical relationship based on considerations of causality between the two Noether-conserved quantities of a system: its Hamiltonian and its entropy production. In natural units, when complexified,
Michael C. Parker, Chris Jeynes
doaj   +1 more source

Low-Order Scaling Quasiparticle Self-Consistent GW for Molecules

open access: yesFrontiers in Chemistry, 2021
Low-order scaling GW implementations for molecules are usually restricted to approximations with diagonal self-energy. Here, we present an all-electron implementation of quasiparticle self-consistent GW for molecular systems.
Arno Förster, Lucas Visscher
doaj   +1 more source

Correction of thermographic images based on the minimization method of Tikhonov functional [PDF]

open access: yesYugoslav Journal of Operations Research, 2022
The paper considers the method of correction of thermographic images (thermograms) obtained by recording in the infrared range of radiation from the surface of the object under study using a thermal imager.
Baaj Obaida   +2 more
doaj   +1 more source

Interfacial Stresses for a Coated Irregularly Shaped Hole Embedded in an Infinite Solid under Point Heat Singularity

open access: yesMathematics, 2023
Particle-reinforced metals are being developed for advanced heat dissipation applications. However, an irregularly shaped void develops during eutectic solidification and enhances interfacial stress induced by visco-plastic deformation in temperature ...
Yi-Lun Liao   +2 more
doaj   +1 more source

Matlab tool REGCONT2: effective source depth estimation by means of Tikhonov’s regularized downwards continuation of potential fields

open access: yesContributions to Geophysics and Geodesy, 2018
Transformation based on downward continuation of potential fields is an important tool in their interpretation – depths of shallowest important sources can be determined by means of stable downward continuation algorithms.
Roman PAŠTEKA   +2 more
doaj   +1 more source

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