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Nonperturbative Effects in Energy Correlators: From Characterizing Confinement Transition to Improving α_{s} Extraction.
Phys Rev Lett
December 2024
Center for Theoretical Physics, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA.
Energy correlators provide a powerful observable to study fragmentation dynamics in QCD. We demonstrate that the leading nonperturbative corrections for projected N-point energy correlators are described by the same universal parameter for any N, which has already been determined from other event shape fits. Including renormalon-free nonperturbative corrections substantially improves theoretical predictions of energy correlators, notably the transition into the confining region at small angles.
View Article and Find Full Text PDFScaling Violation in Power Corrections to Energy Correlators from the Light-Ray Operator Product Expansion.
Phys Rev Lett
December 2024
School of Physics, Peking University, Beijing 100871, China.
In recent years, energy correlators have emerged as a powerful tool to explore the field theoretic structure of strong interactions at particle colliders. In this Letter we initiate a novel study of the nonperturbative power corrections to the projected N-point energy correlators in the limit where the angle between the detectors is small. Using the light-ray operator product expansion as a guiding principle, we derive the power corrections in terms of two nonperturbative quantities describing the fragmentation of quarks and gluons.
View Article and Find Full Text PDFEffects of clustering heterogeneity on the spectral density of sparse networks.
Phys Rev E
November 2024
Physics Institute, Federal University of Rio Grande do Sul, 91501-970 Porto Alegre, Brazil.
We derive exact equations for the spectral density of sparse networks with an arbitrary distribution of the number of single edges and triangles per node. These equations enable a systematic investigation of the effects of clustering on the spectral properties of the network adjacency matrix. In the case of heterogeneous networks, we demonstrate that the spectral density becomes more symmetric as the fluctuations in the triangle-degree sequence increase.
View Article and Find Full Text PDFIsomeric Population Transfer of the ^{229}Th Nucleus via Hyperfine Electronic Bridge.
Phys Rev Lett
November 2024
Center for Theoretical Physics & School of Physics and Optoelectronic Engineering, Hainan University, Haikou 570228, China.
The electronic bridge (EB) excitation of nuclei has been found as a versatile approach to efficiently excite the ^{229}Th isomers. Previous studies on EB excitation have typically disregarded the hyperfine structure as well as the decay of the excited atoms and ions by just treating the nucleus-electron coupling perturbatively. In the present work, we apply a quantum-optical approach to nonperturbatively investigate EB excitation of ^{229}Th^{3+} ions.
View Article and Find Full Text PDFFlat band fine-tuning and its photonic applications.
Nanophotonics
September 2024
Center for Theoretical Physics of Complex Systems, Institute for Basic Science (IBS), 34126, Daejeon, Republic of Korea.
Article Synopsis
- Flat bands in tight-binding lattices are unique energy bands that can exhibit macroscopic degeneracies and respond interestingly to changes, making them candidates for exotic physical phases.
- The review explores methods to create these flat band networks, focusing on symmetry and precise adjustments, and how these methods can handle perturbations in single-particle and many-body contexts.
- Notable discoveries from this strategy include non-perturbative metal-insulator transitions and fractal phases, with potential applications in designing advanced nanophotonic systems like photonic crystals and metasurfaces.
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