T-and Y-systems are ubiquitous structures in classical and quantum integrable systems.
They are difference equations having a variety of aspects related to commuting transfer …

We present a unified approach to the Thermodynamic Bethe Ansatz (TBA) for magnetic
chains and field theories that includes the finite size (and zero-temperature) calculations for …

We present sum representations for all characters of the unitary Virasoro minimal models.
They can be viewed as fermionic companions of the Rocha-Caridi sum representations, the …

We prove a useful identity valid for all ADE minimal S-matrices, that clarifies the
transformation of the relative thermodynamic Bethe Ansatz (TBA) from its standard form into …

A bstract Renormalization Group domain walls are natural conformal interfaces between two
CFTs related by an RG flow. The RG domain wall gives an exact relation between the …

The N=∞ vector O (N) model is a solvable, interacting field theory in three dimensions (D). In
a recent paper with Chubukov and Ye, we have computed a universal number, c∼ …

A bstract In this paper we evaluate the averages of conserved densities and currents
associated to charges of generic spin in (1+ 1)-dimensional massive integrable Quantum …

Dilogarithm identities for the central charges and conformal dimensions exist for at least
large classes of rational conformally invariant quantum field theories in two dimensions. In …

A bstract We explicitly construct families of integrable σ-model actions smoothly inter-
polating between exact CFTs. In the ultraviolet the theory is the direct product of two current …

A bstract It is well understood that 2d conformal field theory (CFT) deformed by an
irrelevant\(T\overline {T}\) perturbation of dimension 4 has universal properties. In particular …