Results 31 to 40 of about 3,569,422 (339)
T T ¯ $$ T\overline{T} $$ -deformation and long range spin chains
Journal of High Energy Physics, 2020 We point out that two classes of deformations of integrable models, developed completely independently, have deep connections and share the same algebraic origin. One class includes the T T ¯ $$ T\overline{T} $$ -deformation of 1+1 dimensional integrable
Balázs Pozsgay +2 more
doaj +1 more source
Hamiltonian truncation approach to quenches in the Ising field theory
Nuclear Physics B, 2016 In contrast to lattice systems where powerful numerical techniques such as matrix product state based methods are available to study the non-equilibrium dynamics, the non-equilibrium behaviour of continuum systems is much harder to simulate.
T. Rakovszky +4 more
doaj +1 more source
Group field theory on quantum groups
, 2022 We introduce the framework of Hopf algebra field theory (HAFT) which generalizes the notion of group field theory to the quantum group (Hopf algebra) case. We focus in particular on the 3d case and show how the HAFT we considered is topological. The highlight of the construction is the notion of plane-wave which leads, in the specific example of SUq (2)
Girelli, Florian, Laudonio, Matteo
openaire +2 more sources
Overlaps after quantum quenches in the sine-Gordon model
Physics Letters B, 2017 We present a numerical computation of overlaps in mass quenches in sine-Gordon quantum field theory using truncated conformal space approach (TCSA). To improve the cut-off dependence of the method, we use a novel running coupling definition which has a ...
D.X. Horváth, G. Takács
doaj +1 more source
Properties of RG interfaces for 2D boundary flows
Journal of High Energy Physics, 2021 We consider RG interfaces for boundary RG flows in two-dimensional QFTs. Such interfaces are particular boundary condition changing operators linking the UV and IR conformal boundary conditions. We refer to them as RG operators.
Anatoly Konechny
doaj +1 more source
Quantum Fluctuations in the Effective Relational GFT Cosmology
Frontiers in Astronomy and Space Sciences, 2021 We analyze the size and evolution of quantum fluctuations of cosmologically relevant geometric observables, in the context of the effective relational cosmological dynamics of GFT models of quantum gravity.
L. Marchetti +3 more
doaj +1 more source
Loop quantum cosmology from group field theory [PDF]
, 2014 We show that the effective dynamics of the recently proposed isotropic condensate state of group field theory with Laplacian kinetic operator can be equivalent to that of homogeneous and isotropic loop quantum cosmology in the improved dynamics ...
Calcagni, Gianluca
core +3 more sources
Nuclear Physics B, 2015 We study the SU(2)k Wess–Zumino–Novikov–Witten (WZNW) theory perturbed by the trace of the primary field in the adjoint representation, a theory governing the low-energy behavior of a class of strongly correlated electronic systems.
R.M. Konik +3 more
doaj +1 more source
Group categories and their field theories [PDF]
Geometry & Topology Monographs, 1999 A group-category is an additively semisimple category with a monoidal product structure in which the simple objects are invertible. For example in the category of representations of a group, 1-dimensional representations are the invertible simple objects.
openaire +2 more sources
LeClair-Mussardo series for two-point functions in Integrable QFT
Journal of High Energy Physics, 2018 We develop a well-defined spectral representation for two-point functions in relativistic Integrable QFT in finite density situations, valid for space-like separations.
B. Pozsgay, I.M. Szécsényi
doaj +1 more source