Results 91 to 100 of about 3,742 (302)

Iterated Lorentz And Iterated Triangle Transformations

open access: yes
This thesis presents a novel connection between a group of triangle transformations and the group of Lorentz transformations in spacetime R1,2. This connection is the third part of the thesis.
Kloeckner, Matthias
core   +1 more source

Helical Electron Beam Micro‐Bunching by High‐Order Modes in a Micro‐Plasma Waveguide

open access: yesAdvanced Science, EarlyView.
ABSTRACT Electron acceleration by a high‐power Laguerre‐Gaussian pulse in a micro‐plasma waveguide is investigated. When the incident laser travels in the waveguide, electrons on the wall are extracted into the vacuum core and accelerated by the longitudinal field of the waveguide mode.
Xingju Guo, Longqing Yi
wiley   +1 more source

Relativistic and gravitational transformations in electrochemistry and nuclear magnetic resonance spectroscopy

open access: yesOpen Physics
A relativistic transformation of the electrode potential has been derived to account for time dilation effects in electrode processes. This newly formulated Lorentz transformation is interpreted in terms of the generation of spin-2 boson gravitons ...
Baig Mirza Wasif
doaj   +1 more source

Use of real Dirac matrices in two-dimensional coupled linear optics

open access: yesPhysical Review Special Topics. Accelerators and Beams, 2011
The Courant-Snyder theory for two-dimensional coupled linear optics is presented, based on the systematic use of the real representation of the Dirac matrices.
C. Baumgarten
doaj   +1 more source

Quantum Physical Origin of Lorentz Transformations

open access: yes, 2017
International audienceOur aim is to derive the symmetries of the space-time, i.e. the Lorentz transformations, from discrete symmetries of the interactions between the most fundamental constituents of matter, in particular quarks and leptons. The role of
Kerner, R.
core   +1 more source

A Flexible Metamaterial Absorber via Loss Engineering for Large‐Area Ultra‐Broadband Infrared Extinction

open access: yesAdvanced Science, EarlyView.
Designed and demonstrated a flexible metamaterial absorber via loss engineering for large‐area ultra‐broadband infrared extinction, providing a new method for miniaturization of absorbers and flexible optical devices. ABSTRACT The advancement of compact and wearable optical systems is critically limited by the lack of high‐performance, integrable ...
Zhe Wu   +11 more
wiley   +1 more source

Lorentz-conformal transformations in the plane

open access: yes, 2017
While conformal transformations of the plane preserve Laplace\u27s equation, Lorentz-conformal mappings preserve the wave equation. This property gives rise to a rich Lorentzian geometry in dimension 1+1.
Shipman, Barbara A.   +2 more
core   +1 more source

Remnant group of local Lorentz transformations in f(T) theories [PDF]

open access: yes, 2015
It is shown that the extended teleparallel gravitational theories, known as f(T) theories, inherit some on shell local Lorentz invariance associated with the tetrad field defining the spacetime structure.
Fiorini, Franco Luis, Ferraro, Rafael
core   +1 more source

A geometric view on local Lorentz transformations in teleparallel gravity

open access: yes, 2021
Local Lorentz transformations play an important role in teleparallel gravity theories, in which a tetrad is conventionally employed as a fundamental field variable describing the gravitational field.
Hohmann, Manuel
core   +1 more source

Coupled Vacancy and Phonon‐Scattering Engineering Drive Defect Evolution Toward Multifunctional High‐Performance Bi2Te3 Thermoelectrics

open access: yesAdvanced Science, EarlyView.
ZnSb reduces carrier concentration and suppresses Te volatilization, while Se substitution within QLs softens phonons and enhances anharmonicity. Swapped bilayers near twin boundaries strengthen phonon scattering and interlayer bonding. As a result, the optimal sample achieves an ultra‐high zT ∼1.51, cooling temperature difference of ∼70 K, power ...
Ruiheng Li   +12 more
wiley   +1 more source

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