We present concrete evidence that Yang-Mills theory exhibits non-unitarity in non-integer spacetime dimensions.This violation of unitarity stems from evanescent operators that,while vanishing in four dimensions,are no...We present concrete evidence that Yang-Mills theory exhibits non-unitarity in non-integer spacetime dimensions.This violation of unitarity stems from evanescent operators that,while vanishing in four dimensions,are non-zero in general d dimensions.We demonstrate that these evanescent operators lead to the emergence of both negative-norm states and complex anomalous dimensions.展开更多
The structural evolutions of the organisms during the development of billions of years endow them with remarkable thermal-regulation properties,which have significance to their survival against the outer versatile env...The structural evolutions of the organisms during the development of billions of years endow them with remarkable thermal-regulation properties,which have significance to their survival against the outer versatile environment.Inspired by the nature,there have been extensive researches to develop thermoregulating materials by mimicking and utilizing the advantages from the natural organisms.In this review,the latest advances in thermal regulation of bioinspired microstructures are summarized,classifying the researches from dimension.The representative materials are described with emphasis on the relationship between the structural features and the corresponding thermal-regulation functions.For one-dimensional materials,wild silkworm cocoon fibers have been involved,and the reasons for unique optical phenomena have been discussed.Pyramid cone structure,grating and multilayer film structure are chosen as typical examples of two-dimensional bionics.The excellent thermal performance of the three-dimensional network frame structures is the focus.Finally,a summary and outlook are given.展开更多
We compute the Higgs plus two-quark and one-gluon amplitudes(H→qqg)and Higgs plus three-gluon amplitudes(H→3 g)in the Higgs effective theory with a general class of operators.By changing the quadratic Casimir CF to ...We compute the Higgs plus two-quark and one-gluon amplitudes(H→qqg)and Higgs plus three-gluon amplitudes(H→3 g)in the Higgs effective theory with a general class of operators.By changing the quadratic Casimir CF to CA,the maximally transcendental parts of the H→qqg amplitudes turn out to be equivalent to that of the H→3 g amplitudes,which also coincide with the counterparts in N=4 SYM.This generalizes the so-called maximal transcendentality principle to the Higgs amplitudes with external quark states,thus the full QCD theory.We further verify that the correspondence applies also to two-loop form factors of more general operators,in both QCD and scalar-YM theory.Another interesting relation is also observed between the planar H→qqg amplitudes and the minimal density form factors in N=4 SYM.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.12175291,11935013,and 12047503)the Chinese Academy of Siences(Grant No.YSBR-101)the support of the HPC Cluster of the Institute of Theoretical Physics,Chinese Academy of Sciences(ITP-CAS)。
文摘We present concrete evidence that Yang-Mills theory exhibits non-unitarity in non-integer spacetime dimensions.This violation of unitarity stems from evanescent operators that,while vanishing in four dimensions,are non-zero in general d dimensions.We demonstrate that these evanescent operators lead to the emergence of both negative-norm states and complex anomalous dimensions.
基金supported by the Top Young Talents of Ten Thousand Talents Plan,National Natural Science Foundation of China(51971133,51801121,51902200,and 52072241)the Shanghai Science and Technology Committee(19JC1410400,19ZR1425100).
文摘The structural evolutions of the organisms during the development of billions of years endow them with remarkable thermal-regulation properties,which have significance to their survival against the outer versatile environment.Inspired by the nature,there have been extensive researches to develop thermoregulating materials by mimicking and utilizing the advantages from the natural organisms.In this review,the latest advances in thermal regulation of bioinspired microstructures are summarized,classifying the researches from dimension.The representative materials are described with emphasis on the relationship between the structural features and the corresponding thermal-regulation functions.For one-dimensional materials,wild silkworm cocoon fibers have been involved,and the reasons for unique optical phenomena have been discussed.Pyramid cone structure,grating and multilayer film structure are chosen as typical examples of two-dimensional bionics.The excellent thermal performance of the three-dimensional network frame structures is the focus.Finally,a summary and outlook are given.
基金supported in part by the National Natural Science Foundation of China(Grants No.11822508,11947302 and 11935013)the Chinese Academy of Sciences(CAS)Hundred-Talent Program+1 种基金the Key Research Program of Frontier Sciences of CASsupport of the HPC Cluster of ITP-CAS。
文摘We compute the Higgs plus two-quark and one-gluon amplitudes(H→qqg)and Higgs plus three-gluon amplitudes(H→3 g)in the Higgs effective theory with a general class of operators.By changing the quadratic Casimir CF to CA,the maximally transcendental parts of the H→qqg amplitudes turn out to be equivalent to that of the H→3 g amplitudes,which also coincide with the counterparts in N=4 SYM.This generalizes the so-called maximal transcendentality principle to the Higgs amplitudes with external quark states,thus the full QCD theory.We further verify that the correspondence applies also to two-loop form factors of more general operators,in both QCD and scalar-YM theory.Another interesting relation is also observed between the planar H→qqg amplitudes and the minimal density form factors in N=4 SYM.
