Results 71 to 80 of about 18,697,974 (254)
Journal of High Energy Physics, 2021 We discuss modifications to the Hawking spectrum that arise when the asymptotic states are supertranslated or superrotated. For supertranslations we find nontrivial off-diagonal phases in the two-point correlator although the emission spectrum is ...
Ricardo Z. Ferreira, Carlo Heissenberg
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Tunable transport with broken space–time symmetries [PDF]
Physics Reports, 2014 Transport properties of particles and waves in spatially periodic structures that are driven by external time-dependent forces manifestly depend on the space-time symmetries of the corresponding equations of motion. A systematic analysis of these symmetries uncovers the conditions necessary for obtaining directed transport.
Denisov, Sergey Vadimovich +2 more
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Symmetries of quantum systems: a partial inner product space approach
, 2008 We first give a quick survey of the realization of symmetries of quantum systems in the various formalisms of quantum mechanics: traditional (Hilbert space), algebraic (C*-algebras), rigged Hilbert spaces, *-algebras of unbounded operators, partial ...
5th International Symposium on Quantum Theory and Symmetries +1 more
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Gravity‐Dependent Modulation of Downbeat Nystagmus: Insights From Velocity‐Storage Dysfunction
Annals of Clinical and Translational Neurology, EarlyView.ABSTRACT Objective Downbeat nystagmus varies with head position, a phenomenon termed gravity‐dependent modulation. We aimed to clarify its mechanism using a velocity‐storage model. Methods In 10 patients with downbeat nystagmus due to cerebellar disorders, we recorded eye movements at different pitch‐ and roll‐axis head positions.
Ji‐Hyung Park +5 more
wiley +1 more source
Gauge and Space-Time Symmetry Unification
International Journal of Theoretical Physics, 2000 53 pages, 13 tables, 1 ...
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Observer‐Based Adaptive Event‐Triggered Tracking Control for Fuzzy TS Systems With Premise Mismatch
International Journal of Adaptive Control and Signal Processing, EarlyView.This paper presents an adaptive logistic event‐triggered observer‐based tracking controller for Takagi‐Sugeno fuzzy systems under constrained inputs and network delays. Leveraging a hybrid LMI and Secretary Bird Optimization approach, this strategy significantly minimizes communication overhead and computational burden while ensuring optimal reference ...
Oussama Djadane +3 more
wiley +1 more source
Non-minimal couplings to U(1)-gauge fields and asymptotic symmetries
Journal of High Energy PhysicsWe analyse the asymptotic symmetries of electromagnetism non-minimally coupled to scalar fields, with non-minimal couplings of the Fermi type that occur in extended supergravity models.
Oscar Fuentealba +2 more
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Discrete space-time symmetries [PDF]
Czechoslovak Journal of Physics, 1993 Symmetries have always fascinated human beings; they are found in nature, art, and architecture. Physicists, like other scientists have often used symmetries as a basis of their understanding of nature. When the dynamics is unknown, symmetries serve to delineate and define it. When the dynamics is known, symmetries are used to study structure.
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Engineering micromotion in Floquet prethermalization via space-time symmetries [PDF]
We present a systematic framework for Floquet prethermalization under strong resonant driving, emphasizing the pivotal role of dynamical space-time symmetries.
Kemp, Jack +3 more
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Apparent Fine Tunings for Field Theories with Broken Space-Time Symmetries
, 2022 We exhibit a class of effective field theories that have hierarchically small Wilson coefficients for operators that are not protected by symmetries but are not finely tuned.
Rothstein, Ira Z. +2 more
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