Results 61 to 70 of about 55,124 (278)

Why the Cosmological Constant Seems to Hardly Care About Quantum Vacuum Fluctuations: Surprises From Background Independent Coarse Graining

Frontiers in Physics, 2020
Background Independence is a sine qua non for every satisfactory theory of Quantum Gravity. If one tries to establish a corresponding notion of Wilsonian renormalization, or coarse graining, it presents a major conceptual and technical difficulty usually.
Carlo Pagani, Martin Reuter
doaj   +1 more source

Evidence for a novel shift-symmetric universality class from the functional renormalization group

Physics Letters B, 2023
Wetterich's equation provides a powerful tool for investigating the existence and universal properties of renormalization group fixed points exhibiting quantum scale invariance.
Cristobal Laporte, Nora Locht, Antonio D. Pereira, Frank Saueressig   +3 more
doaj   +1 more source

Persistent currents in mesoscopic rings: A numerical and renormalization group study

, 2002
The persistent current in a lattice model of a one-dimensional interacting electron system is systematically studied using a complex version of the density matrix renormalization group algorithm and the functional renormalization group method.
A. Cohen, A. Luther, A. O. Gogolin, A. Schmid, B. L. Altshuler, B. Reulet, C. Honerkamp, C. J. Halboth, C. L. Kane, C. Wetterich, D. C. Mattis, D. Loss, D. Mailly, D. Yue, D. Zanchi, E. M. Q. Jariwala, F. D. M. Haldane, F. D. M. Haldane, G. Bouzerar, H. Kato, H.-F. Cheung, J. Polchinski, J. Sólyom, L. P. Lévy, M. Abraham, M. Henkel, M. Salmhofer, M. Salmhofer, M. Schick, P. Schmitteckert, S. Eggert, S. Jaimungal, S. Qin, S. R. White, T. Busche, T. Giamarchi, T. R. Morris, U. Eckern, U. Schollwöck, V. Chandrasekhar, V. Meden, V. Meden, V. Meden, V. Meden, V. Meden, W. Apel, W. Rabaud   +46 more
core   +1 more source

Prediction of One‐Dimensional Metallicity and π‐Band Superconductivity in Rhodizonate Radical Pancakes

Angewandte Chemie, EarlyView.
Equidistant stacking of radicals is typically unstable due to symmetry‐lowering distortions. We predict that such arrangements can be stabilized by multicentered covalent (“pancake”) bonding and Coulombic repulsion between negatively charged radicals.
Alvaro Lobato, Fernando Izquierdo‐Ruiz, Martin Rahm   +2 more
wiley   +2 more sources

Quantitative functional renormalization group description of the two-dimensional Hubbard model

Physical Review Research, 2020
Using a leading algorithmic implementation of the functional renormalization group (fRG) for interacting fermions on two-dimensional lattices, we provide a detailed analysis of its quantitative reliability for the Hubbard model.
Cornelia Hille, Fabian B. Kugler, Christian J. Eckhardt, Yuan-Yao He, Anna Kauch, Carsten Honerkamp, Alessandro Toschi, Sabine Andergassen   +7 more
doaj   +1 more source

Quantitative functional renormalization for three-dimensional quantum Heisenberg models

SciPost Physics, 2022
We employ a recently developed variant of the functional renormalization group method for spin systems, the so-called pseudo Majorana functional renormalization group, to investigate three-dimensional spin-1/2 Heisenberg models at finite temperatures. We
Nils Niggemann, Johannes Reuther, Björn Sbierski
doaj   +1 more source

Phase Diagram of the Holstein-Hubbard Two-Leg Ladder [PDF]

, 2006
Using a functional renormalization group method, we obtain the phase diagram of the two-leg ladder system within the Holstein-Hubbard model, which includes both electron-electron and electron-phonon interactions.
A. H. Castro Neto, D. K. Campbell, G. T. Zimanyi, Ka-Ming Tam, S.-W. Tsai, T. Ishiguro   +5 more
core   +4 more sources

Assessing a Mitochondrial Disease Treatment via a Novel Statistical Technique for Accelerometer Data

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Therapeutic development for mitochondrial diseases, rare genetic disorders with pathogenic defects of oxidative phosphorylation, is hindered by unsatisfactory outcome measures. To address this problem, we provide the first clinical application of a novel, bias‐adjusted outcome measure of acceleration across a range of subjects ...
Ian W. McKeague, Kristin Engelstad, Yue Ge, Amber Tucker, Shufang Li, Jasim Uddin, Ziwei Zhao, John L. P. Thompson, Michio Hirano   +8 more
wiley   +1 more source

Functional renormalization group approach to color superconducting phase transition

Journal of High Energy Physics, 2019
We investigate the order of the color superconducting phase transition using the functional renormalization group approach. We analyze the Ginzburg-Landau effective theory of color superconductivity and more generic scalar SU(N c) gauge theories by ...
Gergely Fejős, Naoki Yamamoto
doaj   +1 more source

Continuum limit in matrix models for quantum gravity from the Functional Renormalization Group

, 2013
We consider the double-scaling limit in matrix models for two-dimensional quantum gravity, and establish the nonperturbative functional Renormalization Group as a novel technique to compute the corresponding interacting fixed point of the Renormalization
Eichhorn, Astrid, Koslowski, Tim
core   +1 more source