Results 111 to 120 of about 304,578 (296)

Bi-Hamiltonian Aspects of a Matrix Harry Dym Hierarchy

, 2006
We study the Harry Dym hierarchy of nonlinear evolution equations from the bi-Hamiltonian view point. This is done by using the concept of an S-hierarchy.
Fontanelli, Laura, Lorenzoni, Paolo, Pedroni, Marco, Zubelli, Jorge P.   +3 more
core   +2 more sources

Hamiltonian formalism, quantization and S matrix for supergravity

Physics Letters B, 1977
The canonical formalism for supergravity is constructed. The algebra of canonical constraints is found. The correct expression for the S matrix is obtained. Usual “covariant methods” lead to an incorrect S matrix in supergravity, since a new four-particle interaction of ghostfields survives in the Lagrangian expression of the S matrix.
Fradkin, E. S., Vasiliev, M. A.
openaire   +2 more sources

Magnetic and Crystal Symmetry Control on Spin Hall Conductivity in Altermagnets

Advanced Science, EarlyView.
Crystal structures and schematic illustrations of the spin Hall effect (SHE) in altermagnets. High‐symmetry RuO2 exhibits conventional SHE, while tilted RuO2 shows trivial unconventional SHE (USHE) caused by structural tilting. CrSb and MnTe, with reduced magnetic symmetry, display intrinsic USHE arising from symmetry‐driven spin–momentum locking ...
Dameul Jeong, Seoung‐Hun Kang, Young‐Kyun Kwon   +2 more
wiley   +1 more source

Peakons, R-Matrix and Toda-Lattice

, 1995
The integrability of a family of hamiltonian systems, describing in a particular case the motionof N ``peakons" (special solutions of the so-called Camassa-Holm equation) is established in the framework of the $r$-matrix approach, starting from its Lax ...
Airault, Alber, Antonowicz, Antonowicz, Babelon, Bogoyavlenski, Calogero, Camassa, Camassa, Fokas, Grammaticos, Krichever, Krichever, M. Bruschi, Nijhoff, Nijhoff, O. Ragnisco, Oevel, Previato, Semenov-Tianshanski, Suris, Suris, Symes   +22 more
core   +1 more source

The Interplay of Magnetic Order with the Electronic Scattering and Crystal‐Field Effects in a Metallic Ferromagnet

Advanced Science, EarlyView.
The interplay between magnetic ordering and crystal electric field (CEF) excitations plays a pivotal role in defining the low‐energy electrodynamics of quantum materials. By probing the temperature‐dependent THz conductivity in a rare‐earth‐based metallic ferromagnet, we uncover a microscopic connection between localized and itinerant electrons ...
Payel Shee, Tanaya Halder, Chia‐Jung Yang, Nainish Tickoo, Ratiranjan Samal, Ruta Kulkarni, Shishir K. Pandey, Vikas Kashid, Ashis K. Nandy, Arumugam Thamizhavel, Anamitra Mukherjee, Shovon Pal   +11 more
wiley   +1 more source

A Family of Integrable Different-Difference Equations, Its Hamiltonian Structure, and Darboux-Bäcklund Transformation

Discrete Dynamics in Nature and Society, 2018
An integrable family of the different-difference equations is derived from a discrete matrix spectral problem by the discrete zero curvature representation. Hamiltonian structure of obtained integrable family is established.
Xi-Xiang Xu, Meng Xu
doaj   +1 more source

Passivity-Based Nonlinear Excitation Control of Power Systems with Structure Matrix Reassignment

Information, 2013
Passivity-based control is widely used in electronic circuit systems because it can utilize their internal structures to facilitate the controller design.
Bing Chu, Yanhong Liu, Chunwen Li, Jianyong Li   +3 more
doaj   +1 more source

Matrix representation of the time operator

, 2012
In quantum mechanics the time operator $\Theta$ satisfies the commutation relation $[\Theta,H]=i$, and thus it may be thought of as being canonically conjugate to the Hamiltonian $H$.
Arai A., Carl M. Bender, Favard J., Mariagiovanna Gianfreda, Pollaczek F.   +4 more
core   +1 more source

Hierarchical Embedded Sphere Model: An Interpretable ML‐Guided Multiscale Descriptor Engineering Decodes OER Activity on TM@MO2 Catalysts

Advanced Science, EarlyView.
Hierarchical Embedded Sphere Model combines DFT and interpretable machine learning to decode catalytic activity on TM‐doped MO2. It disentangles global electronic, active‐site, and local coordination effects, revealing two activation mechanisms: dopant‐driven (Rh@MO2) and coordination‐mediated (Fe@ZrO2).
Ziyuan Li, Shan Gao, Yunhan Wang, Yueyu Zhang, Weichao Wang, Xiangmei Duan   +5 more
wiley   +1 more source

Improved Air Stability of Li Argyrodites Through PS43− Rotation Suppression by Al and Se Co‐Substitution for All‐Solid‐State Batteries

Advanced Science, EarlyView.
Al/Se co‐substitution in Li6PS5Cl achieves enhanced dry‐air stability and improves Li+ conductivity, retaining 85% of its high Li+ conductivity (4.91 mS cm−1 at 30 °C) after dry‐air exposure (dew point −40 °C for 5 h). The stability enhancement is experimentally validated and underpinned by theoretical analyses indicating suppressed rotation of P[S2SeO]
Juhyoun Park, Jihun Lee, Yoon‐Seong Kim, Donghyeok Kim, Minseo Jang, Junwoo Lee, Hae‐Yong Kim, Changhun Park, Jeongheon Kim, Habin Chung, Kyung‐Wan Nam, Dong‐Hwa Seo, Yoon Seok Jung   +12 more
wiley   +1 more source