Results 161 to 170 of about 1,476,489 (293)

Fundamental Properties of Heavily Ge‐Doped AlGaN Prepared via Pulsed Sputtering

open access: yesphysica status solidi (b), EarlyView.
This study explores the properties of heavily Ge‐doped AlGaN films prepared via pulsed sputtering deposition. Films with Al content below 34% exhibit higher electron concentrations than Si‐doped counterparts. The maximum carrier concentration reaches 1.8 × 1020 cm−3. Optical bandgaps are enhanced by the Burstein–Moss shift.
Aiko Naito, Kohei Ueno, Hiroshi Fujioka
wiley   +1 more source

Renormalized entanglement entropy [PDF]

open access: yes, 2016
We develop a renormalization method for holographic entanglement entropy based on area renormalization of entangling surfaces. The renormalized entanglement entropy is derived for entangling surfaces in asymptotically locally anti-de Sitter spacetimes in general dimensions and for entangling surfaces in four dimensional holographic renormalization ...
arxiv   +1 more source

Functional renormalization group approach to the Kraichnan model [PDF]

open access: yesPhysical Review E, 2015
We study the anomalous scaling of the structure functions of a scalar field advected by a random Gaussian velocity field, the Kraichnan model, by means of Functional Renormalization Group techniques. We analyze the symmetries of the model and derive the leading correction to the structure functions considering the renormalization of composite operators
openaire   +4 more sources

Nuclear Physics in the Era of Quantum Computing and Quantum Machine Learning

open access: yesAdvanced Quantum Technologies, EarlyView.
The use of QML in the realm of nuclear physics at low energy is almost nonexistent. Three examples of the use of quantum computing and quantum machine in nuclear physics are presented: the determination of the phase/shape in nuclear models, the calculation of the ground state energy, and the identification of particles in nuclear physics experiments ...
José‐Enrique García‐Ramos   +4 more
wiley   +1 more source

Polyakov Effective Action from Functional Renormalization Group Equation

open access: yes, 2010
We discuss the Polyakov effective action for a minimally coupled scalar field on a two dimensional curved space by considering a non-local covariant truncation of the effective average action. We derive the flow equation for the form factor in $\int\sqrt{
Alessandro Codello   +17 more
core   +1 more source

Nanotubes from Transition Metal Dichalcogenides: Recent Progress in the Synthesis, Characterization and Electrooptical Properties

open access: yesSmall, EarlyView.
This review describes recent (mostly last five years) progress in the synthesis, structural characterization, and properties of nanotubes from layered transition metal dichalcogenides, including in‐silico investigations. In the picture, ultra long multiwall nanotubes (up to 0.5 mm) nanotubes reported in Ref.
Lena Yadgarov, Reshef Tenne
wiley   +1 more source

Isotropic Lifshitz critical behavior from the functional renormalization group

open access: yesNuclear Physics B, 2015
The Lifshitz critical behavior for a single component field theory is studied for the specific isotropic case in the framework of the Functional Renormalization Group.
A. Bonanno, D. Zappalà
doaj  

Single-boson exchange functional renormalization group application to the two-dimensional Hubbard model at weak coupling. [PDF]

open access: yesEur Phys J B, 2022
Fraboulet K   +6 more
europepmc   +1 more source

Advanced Characterization of the Spatial Variation of Moiré Heterostructures and Moiré Excitons

open access: yesSmall, EarlyView.
In this review, the authors discuss recent advanced tools to characterize and understand the effects of spatial variation and inhomogeneities in moiré heterostructures over multiple length scales. Emphasis is placed on correlating the impact of twist angle misalignment, nano‐scale disorder, and atomic relaxation on the moiré potential and moiré ...
Alberto de la Torre   +3 more
wiley   +1 more source

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