Results 51 to 60 of about 105,729 (287)

Pinning of longitudinal phonons in holographic spontaneous helices

Journal of High Energy Physics, 2018
We consider the spontaneous breaking of translational symmetry and identify the associated Goldstone mode — a longitudinal phonon — in a holographic model with Bianchi VII helical symmetry. For the first time in holography, we observe the pinning of this
Tomas Andrade, Matteo Baggioli, Alexander Krikun, Napat Poovuttikul   +3 more
doaj   +1 more source

Phases of Pseudo-Nambu-Goldstone bosons

Journal 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, Matthew McCullough, Marco Merchand, Stefan Pokorski, Kazuki Sakurai   +4 more
doaj   +1 more source

Hidden symmetry protection for surface plasmon polaritons

Physical Review Research, 2023
In this study, we reveal the general mechanism of hidden symmetry protection for surface plasmon polaritons (SPPs). SPPs are protected at zero frequency when the dielectric-metal interface exhibits an exceptional symmetry.
Yosuke Nakata, Toshihiro Nakanishi, Ryo Takahashi, Fumiaki Miyamaru, Shuichi Murakami   +4 more
doaj   +1 more source

Inflaton as a pseudo-Nambu-Goldstone boson

Physics Letters B, 2023
In the realistic model of cosmic inflation the inflaton potential should be flat and stable under quantum corrections. It is natural to imagine that there is some symmetry behind and an idea of the inflaton as a Nambu-Goldstone boson of spontaneous ...
Noriaki Kitazawa
doaj   +1 more source

Influence of Temperature on Scratch and Wear Properties of Technical Thermoplastics: Implications for Material Selection

Advanced Engineering Materials, EarlyView.
The share of technical thermoplastics is expected to grow further in the e‐mobility segment. In this study, a detailed temperature‐based tribological characterization of technical thermoplastics is performed. The tribological properties are discussed in terms of the dynamic mechanical properties of polymers at different ambient temperatures. A proof of
Harsha Raghuram, Thomas Koch, Vasiliki-Maria Archodoulaki   +2 more
wiley   +1 more source

Breaking of scaling symmetry by massless scalar on de Sitter

Physics Letters B, 2019
We study the response of a classical massless minimally coupled scalar to a static point scalar charge on de Sitter. By considering explicit solutions of the problem we conclude that – even though the dynamics formally admits dilatation (scaling ...
D. Glavan, S.P. Miao, T. Prokopec, R.P. Woodard   +3 more
doaj   +1 more source

First‐Principles Modeling of Solid Solution Softening and Hardening Effects in Al–Mg–Zr–Si Aluminum Alloys

Advanced Engineering Materials, EarlyView.
The role of various alloying elements in face‐centered cubic aluminum on the barrier of a Shockley partial dislocation during its motion is presented. The study aims to understand how alloying atoms such as Mg, Si, and Zr affect the energy landscape for dislocation motion, thus influencing the solid solution hardening and softening in aluminum, which ...
Inna Plyushchay, Zhengqing Wei, Nebahat Bulut, Sibylle Gemming   +3 more
wiley   +1 more source

Spontaneous symmetry breaking in tensor theories

Journal of High Energy Physics, 2019
In this work we study spontaneous symmetry breaking patterns in tensor models. We focus on the patterns which lead to effective matrix theories transforming in the adjoint of U(N).
P. Diaz, J. A. Rosabal
doaj   +1 more source

Composite Electrospun Fibers Containing Optimized B‐ and Cu‐Doped Bioactive Glass Sol‐Gel Particles for Potential Soft Tissue Engineering Applications

Advanced Engineering Materials, EarlyView.
This article describes the preparation and characterization of poly(ε‐caprolactone) electrospun composite fibers incorporating sol‐gel‐derived bioactive glass particles doped with B and Cu. Scanning electron microscopy, energy‐dispersive X‐ray spectroscopy, Fourier‐transform infrared spectroscopy, contact angle, acellular bioactivity, mechanical and ...
Elisa Piatti, Marta Miola, Liliana Liverani, Paolo Sartori, Enrica Verné, Aldo R. Boccaccini   +5 more
wiley   +1 more source

Quark Propagator with electroweak interactions in the Dyson-Schwinger approach

EPJ Web of Conferences, 2017
Motivated by the non-negligible dynamical backcoupling of the electroweak interactions with the strong interaction during neutron star mergers, we study the effects of the explicit breaking of C, P and flavor symmetry on the strong sector.
Mian Walid Ahmed, Maas Axel
doaj   +1 more source