Results 61 to 70 of about 35,463 (213)

Mingling of the infrared and ultraviolet and the “cosmological constant” for interacting QFT in 2d

Journal of High Energy Physics, 2023
We propose a proper definition of the vacuum expectation value of the stress energy tensor 〈0| T μν | 0〉 for integrable quantum field theories in two spacetime dimensions, which is the analog of the cosmological constant in 4d.
André LeClair
doaj   +1 more source

The Cosmological Constant as an Eigenvalue of a Sturm-Liouville Problem and its Renormalization

, 2005
We discuss the case of massive gravitons and their relation with the cosmological constant, considered as an eigenvalue of a Sturm-Liouville problem. A variational approach with Gaussian trial wave functionals is used as a method to study such a problem.
Cherednikov I O, Cherednikov I O, Dubovsky S L, Fierz M, Garattini R, Remo Garattini, Rubakov V A, Sahni V, Straumann N, Visser M, Zakharov V I   +10 more
core   +1 more source

$\gamma_{5}$ in FDH [PDF]

, 2017
We investigate the regularization-scheme dependent treatment of $\gamma_{5}$ in the framework of dimensional regularization, mainly focusing on the four-dimensional helicity scheme (FDH).
Gnendiger, C., Signer, A.
core   +1 more source

Vacancy‐Controlled Lattice Dynamics and Magnetism in Mn‐Doped CeO2−δ Nanocrystals

Annalen der Physik, Volume 538, Issue 3, March 2026.
ABSTRACT Mn‐doped CeO2−δ${\rm CeO}_{2-\delta }$ nanocrystals provide a model system to quantify how defect chemistry controls emergent magnetism in a wide‐gap oxide. Single‐phase fluorite Ce1−xMnxO2−δ${\rm Ce}_{1-x}{\rm Mn}_x{\rm O}_{2-\delta }$ (0≤x≤0.09$0 \le x \le 0.09$) nanocrystals exhibit nonmonotonic changes in lattice parameter, microstrain ...
Maria Suêd M. Assis, Marcelo S. da Silva, Verônica C. Teixeira, Nilson S. Ferreira   +3 more
wiley   +1 more source

General quartic β-function at three loops

Journal of High Energy Physics
We determine the three-loop MS ¯ $$ \overline{\textrm{MS}} $$ quartic β-function for the most general renormalisable four-dimensional theories. A general parametrisation of the β-function is compared to known β-functions for specific theories to fix all ...
Tom Steudtner, Anders Eller Thomsen
doaj   +1 more source

The three-loop anomalous dimension and the four-loop β-function for N $$ \mathcal{N} $$ = 1 SQED regularized by higher derivatives

Journal of High Energy Physics, 2022
For N $$ \mathcal{N} $$ = 1 SQED with N f flavors regularized by higher derivatives in the general ξ-gauge we calculate the three-loop anomalous dimension of the matter superfields defined in terms of the bare coupling constant and demonstrate its gauge ...
I. E. Shirokov, K. V. Stepanyantz
doaj   +1 more source

Remarks on Renormalization of Black Hole Entropy

, 1996
We elaborate the renormalization process of entropy of a nonextremal and an extremal Reissner-Nordstr\"{o}m black hole by using the Pauli-Villars regularization method, in which the regulator fields obey either the Bose-Einstein or Fermi-Dirac ...
Barbón J. L. F., Bekenstein J. D., de Alwis S. P., Demers J.-G., Hawking S. W., Jae Hyung Yee, Kwang-Sup Soh, Sang Pyo Kim, Solodukhin S. N., Sung Ku Kim, Susskind L.   +10 more
core   +1 more source

Holographic RG flows, entanglement entropy and the sum rule [PDF]

, 2016
We calculate the two-point function of the trace of the stress tensor in holographic renormalization group flows between pairs of conformal field theories.
Casini, Horacio, Teste, Eduardo, Torroba, Gonzalo   +2 more
core   +4 more sources

Inversion of Net Photosynthetic Rate in Winter Rapeseed Based on UAV Multispectral Vegetation Indices and Texture Features

Food and Energy Security, Volume 15, Issue 2, March/April 2026.
ABSTRACT Net photosynthetic rate (Pn) serves as a key indicator for evaluating plant growth and yield. In order to explore an effective method for monitoring winter rapeseed Pn using unmanned aerial vehicle (UAV) multispectral technology, the winter rapeseed was taken as the research object and the multispectral images were obtained through UAVs in ...
ChengYang Ni, HaiNa Zhang, XiangHui Lu, Yue Zhang, Xin Luo, Fan Ma, HaoLong Wan, XiaoYing Feng   +7 more
wiley   +1 more source

Regularity properties and pathologies of position-space renormalization-group transformations [PDF]

Nuclear Physics B - Proceedings Supplements, 1991
We reconsider the conceptual foundations of the renormalization-group (RG) formalism, and prove some rigorous theorems on the regularity properties and possible pathologies of the RG map. Regarding regularity, we show that the RG map, defined on a suitable space of interactions (= formal Hamiltonians), is always single-valued and Lipschitz continuous ...
van Enter, Aernout C.D., Fernández, Roberto, Sokal, Alan D.   +2 more
openaire   +4 more sources