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We present an effective field theory (EFT) approach to extract fundamental cosmological parameters from the Lyman-alpha forest flux fluctuations as an alternative to the standard simulation-based techniques. As a first application, we…

宇宙学与河外天体物理 · 物理学 2025-02-21 Mikhail M. Ivanov , Michael W. Toomey , Naim Göksel Karaçaylı

Hexagonal boron nitride (hBN) has recently emerged as a fascinating platform for room-temperature quantum photonics due to the discovery of robust visible light single-photon emitters. In order to utilize these emitters, it is necessary to…

A strong case has been made that radio waves from sources within about half a degree of the Galactic Center undergo extreme diffractive scattering. However, problems arise when standard (``Kolmogorov'') models of electron density…

天体物理学 · 物理学 2009-11-11 Peter Goldreich , S. Sridhar

The spatiotemporal dynamics of photon emission into a non-local farfield channel and two local nearfield channels from a pair of coupled two level systems is analysed using a model for emission based on Wigner-Weisskopf theory. The local…

量子物理 · 物理学 2008-02-03 Holger F. Hofmann

A variety of models have been explored in regard to the origin of the excess extreme ultraviolet (~ 0.1 keV) emission in the Coma cluster. It is now established that the flux is non-thermal and the only non-thermal source mechanism that…

天体物理学 · 物理学 2007-05-23 Ming Yann Tsay , Chorng-Yuan Hwang , Stuart Bowyer

Electroweak baryogenesis is a simple and attractive candidate mechanism for generating the observed baryon asymmetry in the Universe. Its viability is sometimes investigated in terms of an effective field theory of the Standard Model…

高能物理 - 唯象学 · 物理学 2016-03-23 P. H. Damgaard , A. Haarr , D. O'Connell , A. Tranberg

In order to predict the cosmological abundance of dark matter, an estimation of particle rates in an expanding thermal environment is needed. For thermal dark matter, the non-relativistic regime sets the stage for the freeze-out of the dark…

高能物理 - 唯象学 · 物理学 2024-02-21 Simone Biondini , Nora Brambilla , Gramos Qerimi , Antonio Vairo

The quark determinant in the presence of a background gluon field is calculated in a large quark mass approach within a derivative expansion by considering quark sources. The resulting low-energy QCD Effective Field Theory (EFT) is valid…

高能物理 - 唯象学 · 物理学 2025-09-03 Igor de M. Froldi , Fabio L. Braghin

The classic paper by Fleming, Mehen and Stewart cast doubts on the convergence of spin-triplet nucleon-nucleon partial wave scattering amplitudes when following the proposal of Kaplan, Savage and Wise to construct nuclear effective field…

核理论 · 物理学 2020-09-29 David B. Kaplan

An effective theory to treat the dense nuclear medium by the perturbative expansion method is proposed as a natural extension of the Heavy Baryon Chiral Perturbation Theory (HBChPT). Treating the Fermi momentum scale as a separate scale of…

高能物理 - 唯象学 · 物理学 2007-05-23 Masayasu Harada , Dong-Pil Min , Tae-Sun Park , Chihiro Sasaki , Chaejun Song

In the immediate aftermath of the Big Bang, the universe existed in an extremely hot, dense state in which particle interactions occurred not in a vacuum but within a thermal medium. Under such conditions, the standard framework of quantum…

高能物理 - 唯象学 · 物理学 2026-03-19 Mohamed Aboudonia , Csaba Balazs

Experimental Fowler-Nordheim plots taken from orthodoxly behaving carbon nanotube (CNT) field electron emitters are known to be linear. This shows that, for such emitters, there exists a characteristic field enhancement factor (FEF) that is…

In this paper we study general properties of noncommutative field theories obtained from the Seiberg-Witten limit of string theories in the presence of an external B-field. We analyze the extension of the Wightman axioms to this context and…

高能物理 - 理论 · 物理学 2010-04-06 L. Alvarez-Gaume , M. A. Vazquez-Mozo

Photoelectron spectra obtained from the ab initio solution of the time-dependent Schr\"odinger equation can be in striking disagreement with predictions by the strong-field approximation (SFA) not only at low energy but also around twice…

原子物理 · 物理学 2016-12-14 Th. Keil , S. V. Popruzhenko , D. Bauer

The current associated with field emission is greatly dependent on the electric field at the emitting electrode. This field is a combination of the electric field in vacuum and the space charge created by the current. The latter becomes…

数学物理 · 物理学 2015-05-14 Alex Rokhlenko , Kevin Jensen , Joel L. Lebowitz

This paper is the first in a series revisiting the Faraday effect, or more generally, the theory of electronic quantum transport/optical response in bulk media in the presence of a constant magnetic field. The independent electron…

介观与纳米尺度物理 · 物理学 2008-11-26 Horia D. Cornean , G. Nenciu , Thomas G. Pedersen

This work is devoted to the investigation of the nonstationary problem of the thermal conductivity of a nanoemitter on the surface of a massive copper cathode when a field electron emission current passes through it. At the same time, the…

应用物理 · 物理学 2023-05-08 M. Diachenko , S. Lebedynskyi , R. Kholodov

Effective Field Theory (EFT) provides a powerful framework that exploits a separation of scales in physical systems to perform systematically improvable, model-independent calculations. Particularly interesting are few-body systems with…

其他凝聚态物理 · 物理学 2009-11-10 H. -W. Hammer

In many field electron emission experiments on single-walled carbon nanotubes (SWCNTs), the SWCNT stands on one of two well-separated parallel plane plates, with a macroscopic field FM applied between them. For any given location "L" on the…

1-loop quantum corrections are shown to induce large effects on the refraction index n inside a graphene strip in the presence of an external magnetic field B orthogonal to it. To this purpose, we use the tools of Quantum Field Theory to…

高能物理 - 唯象学 · 物理学 2014-07-09 Olivier Coquand , Bruno Machet