Results 51 to 60 of about 239,074 (309)

Quantum Fields and the Cosmological Constant

Universe
It has been shown that if one solves self-consistently the semiclassical Einstein equations in the presence of a quantum scalar field, with a cutoff on the number of modes, spacetime become flatter when the cutoff increases. Here, we extend the result to
Renata Ferrero, Vincenzo Naso, Roberto Percacci   +2 more
doaj   +1 more source

Renormalizability of Alternative Theories of Gravity: Differences between Power Counting and Entropy Argument

Universe, 2021
It is well known that General Relativity cannot be considered under the standard of a perturbatively renormalizable quantum field theory, but asymptotic safety is taken into account as a possibility for the formulation of gravity as a non-perturbative ...
Francesco Bajardi, Francesco Bascone, Salvatore Capozziello   +2 more
doaj   +1 more source

Direct Evidence of Topological Dirac Fermions in a Low Carrier Density Correlated 5d Oxide

Advanced Functional Materials, EarlyView.
The 5d oxide BiRe2O6 is discovered as a low‐carrier‐density topological semimetal hosting symmetry‐protected Dirac fermions stabilized by nonsymmorphic symmetries. Angle‐resolved photoemission spectroscopy, quantum oscillations, and magnetotransport measurements reveal gapless Dirac cones, quasi‐2D Fermi surfaces, high carrier mobility, and a field ...
Premakumar Yanda, Jorge Cardenas‐Gamboa, Ding Pei, François Bertran, Leila Noohinejad, Snehashish Chatterjee, Changjiang Yi, Iñigo Robredo, Horst Borrmann, Maia G. Vergniory, Chandra Shekhar, Claudia Felser   +11 more
wiley   +1 more source

The renormalization of charge and temporality in quantum electrodynamics [PDF]

, 2008
In this article it is intended a closer look at the renormalization procedure used in quantum electrodynamics to cope with the divergent integrals that appear in higher-order calculations within the theory.
Bacelar Valente, Mario
core  

A Comprehensive Coordinate Space Renormalization of Quantum Electrodynamics to 2-Loop Order

, 1992
We develop a coordinate space renormalization of massless Quantum Electrodynamics using the powerful method of differential renormalization. Bare one-loop amplitudes are finite at non-coincident external points, but do not accept a Fourier transform into
Haagensen, Peter E., Latorre, Jose I.
core   +2 more sources

Non-renormalization theorems of Supersymmetric QED in the Wess-Zumino gauge [PDF]

, 2001
The non-renormalization theorem of chiral vertices and the generalized non-renormalization theorem of the photon self energy are derived in SQED on the basis of algebraic renormalization.
Adler, Adler, Bardeen, Batalin, Batalin, Batalin, Becchi, Becchi, Becchi, Bell, Clark, D. Stöckinger, E. Kraus, Flume, Fujikawa, Giradello, Grisaru, Grisaru, Hollik, Hollik, Häußling, Häußling, Jegerlehner, Konishi, Lucchesi, Maggiore, Novikov, Novikov, Piguet, Shifman, Wess, White   +31 more
core   +2 more sources

Peptide Sequencing With Single Acid Resolution Using a Sub‐Nanometer Diameter Pore

Advanced Functional Materials, EarlyView.
To sequence a single molecule of Aβ1−42–sodium dodecyl sulfate (SDS), the aggregate is forced through a sub‐nanopore 0.4 nm in diameter spanning a 4.0 nm thick membrane. The figure is a visual molecular dynamics (VMD) snapshot depicting the translocation of Aβ1−42–SDS through the pore; only the peptide, the SDS, the Na+ (yellow/green) and Cl− (cyan ...
Apurba Paul, Archith Rayabharam, Lisa Almonte, Eveline Rigo, Joshy Joseph, Ashutosh Kumar, Zhuxin Dong, Narayana Aluru, Gregory Timp   +8 more
wiley   +1 more source

A Generic Renormalization Method in Curved Spaces and at Finite Temperature

, 1994
Based only on simple principles of renormalization in coordinate space, we derive closed renormalized amplitudes and renormalization group constants at 1- and 2-loop orders for scalar field theories in general backgrounds.
Comellas, J., Haagensen, P. E., Latorre, J. I.   +2 more
core   +1 more source

Higher loop renormalization of a supersymmetric field theory [PDF]

, 2007
Using Dyson--Schwinger equations within an approach developed by Broadhurst and Kreimer and the renormalization group, we show how high loop order of the renormalization group coefficients can be efficiently computed in a supersymmetric model.Comment: 8 ...
Bogoliubov, Broadhurst, Broadhurst, Connes, Connes, Connes, Fidel A. Schaposnik, Gustavo Lozano, Kreimer, Kreimer, Marc P. Bellon, Wess   +11 more
core   +7 more sources

Local Thermal Conductivity Patterning in Rotating Lattice Crystals of Anisotropic Sb2S3

Advanced Functional Materials, EarlyView.
Microscale control of thermal conductivity in Sb2S3 is demonstrated via laser‐induced rotating lattice crystals. Thermal conductivity imaging reveals marked thermal transport anisotropy, with the c axis featuring amorphous‐like transport, whereas in‐plane directions (a, b) exhibit 3.5x and 1.7x larger thermal conductivity.
Eleonora Isotta, Rosemary Wynnychenko, Binayak Mukherjee, Jack Kaman, Hrushikesh Sahasrabuddhe, Jiongzhi Zheng, Anubhav Jain, Geoffroy Hautier, Alexandra Zevalkink, Evan Musterman, Volkmar Dierolf, Himanshu Jain, G. Jeffrey Snyder, Oluwaseyi Balogun   +13 more
wiley   +1 more source