On the Symmetries of Classical String Theory
I discuss some aspects of conformal defects and conformal interfaces in two spacetime dimensions. Special emphasis is placed on their role as spectrumgenerating symmetries of classical string theory.
Triangular reductions of the 2D toda hierarchy
New reductions of the 2D Toda equations associated with lower-triangular difference operators are proposed. Their explicit Hamiltonian description is obtained.
On the quantum inverse problem for the closed Toda chain
- Mathematics, Physics
We reconstruct the canonical operators pi, qi of the quantum closed Toda chain in terms of Sklyanin's separated variables.
On the r-matrix structure of the hyperbolic BC(n) Sutherland model
Working in a symplectic reduction framework, we construct a dynamical r-matrix for the classical hyperbolic BC(n) Sutherland model with three independent coupling constants. We also examine the Lax…
Differential algebra of the Painlevé property
In the 1970s, self-similar solutions to integrable PDEs were found to satisfy the Painlevé condition. There ensued a proposal to linearize the Painlevé condition via inverse scattering, which…
Classical Integrable and Separable Hamiltonian Systems
- MathematicsQuantum versus Classical Mechanics and Integrability Problems
In this chapter we introduce the concept of classical integrability of Hamiltonian systems and then develop the separability theory of such systems based on the notion of separation relations…
SELECTED TOPICS IN CLASSICAL INTEGRABILITY
Basic notions regarding classical integrable systems are reviewed. An algebraic description of the classical integrable models together with the zero curvature condition description is presented. The…
Quantum integrability of quadratic Killing tensors
Quantum integrability of classical integrable systems given by quadratic Killing tensors on curved configuration spaces is investigated. It is proven that, using a “minimal” quantization scheme,…
Painlevé Tests, Singularity Structure and Integrability
After a brief introduction to the Painleve property for ordinary differential equations, we present a concise review of the various methods of singularity analysis which are commonly referred to as…
Integrable symplectic maps associated with the ZS-AKNS spectral problem
The Darboux transformations (DTs) associated with the well-known ZS-AKNS spectral problem are regarded as discrete spectral problems. Two kinds of integrable symplectic maps are derived from them…