In this note we explore the possible marginal deformations of general (0,2) non-linear sigma-models, which arise as descriptions of the weakly coupled (large radius) limits of four-dimensional N = 1 compactifications of ...

The authors present a post-compensation technique for continuous-time (CT) SD modulators based on efficient finiteorder Volterra models. At first, the authors develop a behavioural model for a CT sigma –delta modulator ...

An exact hairy asymptotically locally AdS black hole solution with a flat horizon in the Einstein-nonlinear sigma model system in (3+1) dimensions is constructed. The ansatz for the nonlinear SU(2) field is regular everywhere ...

An approach for compensating non-linearities in a continuous-time first-order sigma-delta converter with one bit quantization is presented. The proposed compensators are parallel nonlinear dynamic systems using piecewise ...

In this work, taking advantage of the Generalized Hedgehog Ansatz, we construct new self-gravitating solitons in a cavity with mirror-like boundary conditions for the SU(2) Non-linear Sigma Model and Skyrme model. For ...

We consider a class of ansatze for the construction of exact solutions of the Einstein-nonlinear sigma-model system with an arbitrary cosmological constant in (3+1) dimensions. Exploiting a geometric interplay between the ...

We obtain the exact classical algebra obeyed by the conserved non-local charges in bosonic non-linear sigma models. Part of the computation is specialized for a symmetry group O(N). As it turns out the algebra corresponds ...