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Nonlinear dynamical systems possessing reflection symmetry have an invariant subspace in the phase space. The dynamics within the invariant subspace can be random or chaotic. As a system parameter changes, the motion transverse to the…

混沌动力学 · 物理学 2007-05-23 Changsong Zhou , C. -H. Lai

The Sauter--Schwinger effect predicts the creation of electron--positron pairs from the vacuum due to a quasiconstant electric field $E_{\mathrm{strong}}$. The pair-creation yield can be exponentially enhanced without destroying the…

高能物理 - 理论 · 物理学 2018-07-24 Malte F. Linder

It is found that the electric field can be enhanced strongly inside a permittivity-near-zero object in free space, when the transverse cross section of the object is small and the length along the propagation direction of the incident wave…

光学 · 物理学 2015-05-19 Yi Jin , Pu Zhang , Sailing He

We discuss the Schwinger mechanism in scalar QED and derive the multiplicity distribution of particles created under an external electric field using the LSZ reduction formula. Assuming that the electric field is spatially homogeneous, we…

高能物理 - 唯象学 · 物理学 2009-11-23 K. Fukushima , F. Gelis , T. Lappi

We investigate the process of the Schwinger effect by axial coupling in the natural single-field inflation model in two parts. First we consider the Schwinger effect when the conformal invariance of Maxwell action should be broken by axial…

广义相对论与量子宇宙学 · 物理学 2023-07-04 Mehran Kamarpour

We consider the possibility of experimental verification of vacuum e^+e^- pair creation at the focus of two counter-propagating optical laser beams with intensities 10^{20}-10^{22} W/cm^2, achievable with present-day petawatt lasers, and…

Confirmation of the phononic origin of Cooper pair formation in superconductors came with the demonstration that the interaction was retarded and that the corresponding energy scales were associated with phonons. Using cellular dynamical…

超导电性 · 物理学 2010-02-15 B. Kyung , D. Sénéchal , A. -M. S. Tremblay

We report an observation of phononic Schwinger angular momenta, which fully represent twomode states in a micromechanical resonator. This observation is based on simultaneous optical detection of the mechanical response at the sum and…

介观与纳米尺度物理 · 物理学 2019-11-06 Motoki Asano , Ryuichi Ohta , Takuma Aihara , Tai Tsuchizawa , Hajime Okamoto , Hiroshi Yamaguchi

We investigate possible shapes of the electric field, which oscillating dipoles in a certain region of biological tissue can produce in a neighboring region, or outside the tissue boundaries. We find that a wide range of shapes, including…

生物大分子 · 定量生物学 2022-02-02 Johann Summhammer

Solid-state materials have recently emerged as a new stage of strong-field physics and attosecond science. The mechanism of the electron dynamics driven by an ultrashort intense laser pulse is under intensive discussion. Here we…

材料科学 · 物理学 2020-04-23 Kenichi L. Ishikawa , Yasushi Shinohara , Takeshi Sato , Tomohito Otobe

We consider -- within QED(2) -- the backreaction to the Schwinger pair creation in a time dependent, spatially homogeneous electric field. Our focus is the depletion of the external field as a quench and the subsequent long-term evolution…

高能物理 - 唯象学 · 物理学 2019-06-26 A. Otto , D. Graeveling , B. Kämpfer

The strongly coupled lattice gauge models with confined fermion and scalar matter fields, which in a certain phase break dynamically a global chiral symmetry, are reconsidered from the point of view of the existence of heavy fermions. If…

高能物理 - 格点 · 物理学 2009-10-28 Christoph Frick , Jiri Jersak

We point out that the exchange of a Goldstone pseudo-scalar can provide an enhancement in the dark matter annihilation rate capable of explaining the excess flux seen in high energy cosmic ray data. The mechanism of enhancement involves the…

高能物理 - 唯象学 · 物理学 2009-11-18 Paulo F. Bedaque , Michael I. Buchoff , Rashmish K. Mishra

To probe the connection between the dynamic phase transition and stochastic resonance, we study the mean-field kinetic Ising model and the two-dimensional Josephson-junction array in the presence of appropriate oscillating magnetic fields.…

统计力学 · 物理学 2007-05-23 Beom Jun Kim , Petter Minnhagen , Hyun Jin Kim , M. Y. Choi , Gun Sang Jeon

We discuss the Schwinger pair creation process for the system of massless Dirac fermions in the presence of constant external magnetic and electric fields. The pair production rate remains finite unlike the vacuum decay rate. In the…

介观与纳米尺度物理 · 物理学 2016-12-28 R. A. Abramchuk , M. A. Zubkov

We discuss gluon production by the Schwinger mechanism in collinear color-electric and magnetic fields which may be realized in pre-equilibrium stages of ultra-relativistic heavy-ion collisions. Fluctuations of non-Abelian gauge fields…

高能物理 - 唯象学 · 物理学 2015-06-03 Naoto Tanji , Kazunori Itakura

We study the Sommerfeld enhancement experienced by a scattering object that couples to a tower of mediators. This can occur in, e.g., models of secluded dark matter when the mediator scale is generated naturally by hidden-sector…

高能物理 - 唯象学 · 物理学 2017-08-23 Kristian L. McDonald

A rigorous theory for the generation of a large-scale magnetic field by random non-helically forced motions of a conducting fluid combined with a linear shear is presented in the analytically tractable limit of low Rm and weak shear. The…

天体物理学 · 物理学 2011-12-15 T. Heinemann , J. C. McWilliams , A. A. Schekochihin

In the manuscript, we study the efficiency of pair creation by means of the centrifugal mechanism. The strong magnetic field and the effects of rotation, which always take place in Kerr-type black holes, guarantee the frozen-in condition,…

高能天体物理现象 · 物理学 2023-09-11 Zaza N. Osmanov , Gianluigi Bodo , Paola Rossi

We investigate the pair production near a (near) extremal magnetized Reissner-Nordstrom black hole. The pair production is shown to exist in the extremal state, which can be interpreted as the Schwinger effect due to the strong field under…

广义相对论与量子宇宙学 · 物理学 2023-06-28 Haryanto M. Siahaan