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Scaling theory for non-Hermitian topological transitions.
J Phys Condens Matter
January 2025
Theoretical Science, Poornaprajna Institute of Scientific Research, Ranjith Kumar R, Department of Physics, Indian Institute of Technoloby Bombay, Mumbai, 400076, INDIA.
Understanding the critical properties is essential for determining the physical behavior of topological systems. In this context, scaling theories based on the curvature function in momentum space, the renormalization group (RG) method, and the universality of critical exponents have proven effective. In this work, we develop a scaling theory for non-Hermitian topological states of matter.
View Article and Find Full Text PDFImpact of Next-to-Leading-Order Weak Standard-Model-Effective-Field-Theory Corrections in e^{+}e^{-}→ZH.
Phys Rev Lett
December 2024
High Energy Theory Group, Physics Department, Brookhaven National Laboratory, Upton, New York 11973, USA.
We present results from a complete next-to-leading order (NLO) calculation of e^{+}e^{-}→ZH in the standard model effective field theory (SMEFT) framework, including all contributions from dimension-six operators. At NLO, there are novel dependencies on CP violating parameters in the gauge sector, on modifications to the Higgs boson self-couplings, on alterations to the top quark Yukawa couplings, and on four-fermion operators involving the electron and the top quark, among others. We show that including only the logarithms resulting from renormalization group scaling can produce misleading results, and further, we explicitly demonstrate the constraining power of combining measurements from different energy scales.
View Article and Find Full Text PDFEmergent polar order in nonpolar mixtures with nonreciprocal interactions.
Proc Natl Acad Sci U S A
December 2024
Department of Living Matter Physics, Max Planck Institute for Dynamics and Self-Organization, Göttingen 37077, Germany.
Phenomenological rules that govern the collective behavior of complex physical systems are powerful tools because they can make concrete predictions about their universality class based on generic considerations, such as symmetries, conservation laws, and dimensionality. While in most cases such considerations are manifestly ingrained in the constituents, novel phenomenology can emerge when composite units associated with emergent symmetries dominate the behavior of the system. We study a generic class of active matter systems with nonreciprocal interactions and demonstrate the existence of true long-range polar order in two dimensions and above, both at the linear level and by including all relevant nonlinearities in the Renormalization Group sense.
View Article and Find Full Text PDFEntanglement and Mutual Information in Molecules: Comparing Localized and Delocalized Orbitals.
J Chem Theory Comput
December 2024
Department of Chemical, Pharmaceutical and Agricultural Sciences, University of Ferrara, Via Borsari 76, I-44121 Ferrara, Italy.
The use of the mutual information (MI) as a measure of the entanglement in quantum systems has gained a consensus in recent years, even if there is an ongoing effort to distinguish the classical and quantum contributions contained therein. This quantity has been first introduced in condensed matter physics, in particular, in studies based on the density matrix renormalization group method. This method has been successfully adapted to quantum chemistry problems, opening the way to compute MI also in molecular systems.
View Article and Find Full Text PDFCompression theory for inhomogeneous systems.
Nat Commun
November 2024
James Franck Institute, The University of Chicago, Chicago, IL, USA.
The physics of complex systems stands to greatly benefit from the qualitative changes in data availability and advances in data-driven computational methods. Many of these systems can be represented by interacting degrees of freedom on inhomogeneous graphs. However, the lack of translational invariance presents a fundamental challenge to theoretical tools, such as the renormalization group, which were so successful in characterizing the universal physical behaviour in critical phenomena.
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