Results 31 to 40 of about 698,120 (289)
Light-ray moments as endpoint contributions to modular Hamiltonians
Journal of High Energy Physics, 2021 We consider excited states in a CFT, obtained by applying a weak unitary perturbation to the vacuum. The perturbation is generated by the integral of a local operator J (n) of modular weight n over a spacelike surface passing through x = 0.
Daniel Kabat +3 more
doaj +1 more source
Two-Dilaton Theories in Two Dimensions from Dimensional Reduction [PDF]
, 2000 Dimensional reduction of generalized gravity theories or string theories generically yields dilaton fields in the lower-dimensional effective theory. Thus at the level of D=4 theories and cosmology, many models contain more than just one scalar field (e ...
D. Grumiller, D. Hofmann, W. Kummer
semanticscholar +1 more source
Carving Out the Space of 4D CFTs [PDF]
, 2011 We introduce a new numerical algorithm based on semidefinite programming to efficiently compute bounds on operator dimensions, central charges, and OPE coefficients in 4D conformal and N=1 superconformal field theories.
Poland, David +2 more
core +3 more sources
Conformal bootstrap deformations
Journal of High Energy Physics, 2022 We explore the space of extremal functionals in the conformal bootstrap. By recasting the bootstrap problem as a set of non-linear equations parameterized by the CFT data, we find an efficient algorithm for converging to the extremal solution ...
Nima Afkhami-Jeddi
doaj +1 more source
Signature reversal invariance [PDF]
, 2006 We consider the signature reversing transformation of the metric tensor g_ab goes to -g_ab induced by the chiral transformation of the curved space gamma matrices gamma_a goes to gamma gamma_a in spacetimes with signature (S,T), which also induces a (-1)^
Duff, M. J., Kalkkinen, Jussi
core +5 more sources
Anomaly Matching and Symmetry-Protected Critical Phases in SU(N) Spin Systems in 1+1 Dimensions. [PDF]
Physical Review Letters, 2018 We study (1+1)-dimensional SU(N) spin systems in the presence of global SU(N) rotation and lattice translation symmetries. Knowing the mixed anomaly of the two symmetries at low energy, we identify, by the anomaly matching argument, a topological index ...
Yuan Yao, Chang-Tse Hsieh, M. Oshikawa
semanticscholar +1 more source
Journal of High Energy Physics, 2018 Energy and momentum conservation in the context of a type II, purely transmitting, defect, within a single scalar relativistic two-dimensional field theory, places a severe constraint not only on the nature of the defect but also on the potentials for ...
E. Corrigan, C. Zambon
doaj +1 more source
Wegner-Houghton equation in low dimensions [PDF]
, 1999 We consider scalar field theories in dimensions lower than four in the context of the Wegner-Houghton renormalization group equations (WHRG). The renormalized trajectory makes a non-perturbative interpolation between the ultraviolet and the infrared ...
Carmona, J. M. +2 more
core +2 more sources
Capacity of entanglement in local operators
Journal of High Energy Physics, 2021 We study the time evolution of the excess value of capacity of entanglement between a locally excited state and ground state in free, massless fermionic theory and free Yang-Mills theory in four spacetime dimensions.
Pratik Nandy
doaj +1 more source
Entanglement dynamics after a quench in Ising field theory: a branch point twist field approach
Journal of High Energy Physics, 2019 We extend the branch point twist field approach for the calculation of entanglement entropies to time-dependent problems in 1+1-dimensional massive quantum field theories.
Olalla A. Castro-Alvaredo +3 more
doaj +1 more source