Zobrazeno 1 - 10
of 192
pro vyhledávání: '"Balt, C"'
We study multiscalar theories with $\text{O}(N) \times \text{O}(2)$ symmetry. These models have a stable fixed point in $d$ dimensions if $N$ is greater than some critical value $N_c(d)$. Previous estimates of this critical value from perturbative an
Externí odkaz:
http://arxiv.org/abs/2405.19411
For QFTs in AdS the boundary correlation functions remain conformal even if the bulk theory has a scale. This allows one to constrain RG flows with numerical conformal bootstrap methods. We apply this idea to flows between two-dimensional CFTs, focus
Externí odkaz:
http://arxiv.org/abs/2401.06818
Autor:
van Rees, Balt C., Zhao, Xiang
We consider the behavior of the OPE density $c(\Delta,\ell)$ for conformal four-point functions in the flat-space limit where all scaling dimensions become large. We find evidence that the density reduces to the partial waves $f_\ell(s)$ of the corre
Externí odkaz:
http://arxiv.org/abs/2312.02273
We set up a numerical S-matrix bootstrap problem to rigorously constrain bound state couplings given by the residues of poles in elastic amplitudes. We extract upper bounds on these couplings that follow purely from unitarity, crossing symmetry, and
Externí odkaz:
http://arxiv.org/abs/2312.00127
We discuss general properties of perturbative RG flows in AdS with a focus on the treatment of boundary conditions and infrared divergences. In contrast with flat-space boundary QFT, general covariance in AdS implies the absence of independent bounda
Externí odkaz:
http://arxiv.org/abs/2309.10031
We study families of semidefinite programs (SDPs) that depend nonlinearly on a small number of "external" parameters. Such families appear universally in numerical bootstrap computations. The traditional method for finding an optimal point in paramet
Externí odkaz:
http://arxiv.org/abs/2307.13046
Autor:
van Rees, Balt C., Zhao, Xiang
The boundary correlation functions for a QFT in a fixed AdS background should reduce to S-matrix elements in the flat-space limit. We consider this procedure in detail for four-point functions. With minimal assumptions we rigorously show that the res
Externí odkaz:
http://arxiv.org/abs/2210.15683
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 5, Pp 1-70 (2024)
Abstract For QFTs in AdS the boundary correlation functions remain conformal even if the bulk theory has a scale. This allows one to constrain RG flows with numerical conformal bootstrap methods. We apply this idea to flows between two-dimensional CF
Externí odkaz:
https://doaj.org/article/e811423a2bba4800b8d4c16ac50e1f60
Publikováno v:
Journal of High Energy Physics, Vol 2024, Iss 3, Pp 1-70 (2024)
Abstract We discuss general properties of perturbative RG flows in AdS with a focus on the treatment of boundary conditions and infrared divergences. In contrast with flat-space boundary QFT, general covariance in AdS implies the absence of independe
Externí odkaz:
https://doaj.org/article/160873978f12477daac6074a9ca46541
The S-matrix Bootstrap originated on the idea that the S-matrix might be fully constrained by global symmetries, crossing, unitarity, and analyticity without relying on an underlying dynamical theory that may or may not be a quantum field theory. Rec
Externí odkaz:
http://arxiv.org/abs/2203.02421