Results 81 to 90 of about 287,206 (338)

Chirality transfer from a 3D macro shape to the molecular level by controlling asymmetric secondary flows

open access: yesNature Communications, 2022
External physical forces can bias a spontaneous symmetry breaking process but whether the shape of a reactor plays a role in chiral symmetry breaking processes is an open question. Here, the authors demonstrate chirality transfer from the chiral shape of
Semih Sevim   +7 more
doaj   +1 more source

Computational Modeling of Reticular Materials: The Past, the Present, and the Future

open access: yesAdvanced Materials, EarlyView.
Reticular materials are advanced materials with applications in emerging technologies. A thorough understanding of material properties at operating conditions is critical to accelerate the deployment at an industrial scale. Herein, the status of computational modeling of reticular materials is reviewed, supplemented with topical examples highlighting ...
Wim Temmerman   +3 more
wiley   +1 more source

Broken Time Translation Symmetry as a model for Quantum State Reduction [PDF]

open access: yesSymmetry, 2, 582-608 (2010), 2009
The symmetries that govern the laws of nature can be spontaneously broken, enabling the occurrence of ordered states. Crystals arise from the breaking of translation symmetry, magnets from broken spin rotation symmetry and massive particles break a phase rotation symmetry.
arxiv   +1 more source

On gauge invariance and spontaneous symmetry breaking [PDF]

open access: yesJournal of Physics A: Mathematical and General, 1997
We show how the widely used concept of spontaneous symmetry breaking can be explained in causal perturbation theory by introducing a perturbative version of quantum gauge invariance. Perturbative gauge invariance, formulated exclusively by means of asymptotic fields, is discussed for the simple example of Abelian U(1) gauge theory (Abelian Higgs model).
Michael D\\"utsch   +2 more
openaire   +3 more sources

High‐Yield Bioproduction of Extracellular Vesicles from Stem Cell Spheroids via Millifluidic Vortex Transport

open access: yesAdvanced Materials, EarlyView.
Stem cell spheroids, produced via a high‐throughput microfabrication technique, are transported within a vortex generated at the outlet channels of a cross‐slot millifluidic chip. For Reynolds number exceeding 170–200, intermittent high shear stresses applied to each spheroid within the vortex trigger a massive release of biologically active ...
Elliot Thouvenot   +8 more
wiley   +1 more source

Phases of Pseudo-Nambu-Goldstone bosons

open access: yesJournal of High Energy Physics
We study the vacuum dynamics of pseudo-Nambu-Goldstone bosons (pNGBs) for SO(N + 1) → SO(N) spontaneous and explicit symmetry breaking. We determine the magnitude of explicit symmetry breaking consistent with an EFT description of the effective potential
Fotis Koutroulis   +4 more
doaj   +1 more source

Breaking rotations without violating the KSS viscosity bound

open access: yesJournal of High Energy Physics, 2023
We revisit the computation of the shear viscosity to entropy ratio in a holographic p-wave superfluid model, focusing on the role of rotational symmetry breaking.
Matteo Baggioli   +4 more
doaj   +1 more source

Spontaneous Symmetry Breaking

open access: yes, 2008
One of the most powerful ideas of modern theoretical physics is the mechanism of spontaneous symmetry breaking. It is at the basis of most of the recent achievements in the description of phase transitions in Statistical Mechanics as well as of collective phenomena in solid state physics.
openaire   +2 more sources

Covalent Organic Frameworks for Photocatalysis

open access: yesAdvanced Materials, EarlyView.
This review provides an overview of recent advances in covalent organic frameworks (COFs) for photocatalysis, focusing on sustainable energy applications like water splitting, hydrogen peroxide generation, and CO2 and N2 reduction. It discusses design principles, structure‐function relationships, challenges in COF photocatalysis, and strategies to ...
Bikash Mishra   +6 more
wiley   +1 more source

Nematicity in a cuprate superconductor revealed by angle-resolved photoemission spectroscopy under uniaxial strain

open access: yesnpj Quantum Materials, 2021
The nature of the pseudogap and its relationship with superconductivity are one of the central issues of cuprate superconductors. Recently, a possible scenario has been proposed that the pseudogap state is a distinct phase characterized by spontaneous ...
S. Nakata   +11 more
doaj   +1 more source

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