We construct the noncommutative deformation of the Maldacena-Núñez supergravity solution. The background describes a bound state of D5-D3 branes wrapping an S inside a Calabi-Yau three-fold, and in… (More)

We study semi-classically the dynamics of string solitons in the Maldacena-Nuñez background, dual in the infra-red to N=1, d = 4 SYM. For closed string configurations rotating in the S × R space… (More)

We study spacetime diffeomorphisms in Hamiltonian and Lagrangian formalisms of generally covariant systems. We show that the gauge group for such a system is characterized by having generators which… (More)

We discuss the existence of glueball states for N=1 SYM within the Maldacena-Núñez model. We find that for this model the existence of an area law in the Wilson loop operator does not imply the… (More)

In this paper we examine in detail the implementation, with its associated difficulties, of the Killing conditions and gauge fixing into the variational principle formulation of Bianchi-Type… (More)

1550-7998=20 Diffeomorphism-induced symmetry transformations and time evolution are distinct operations in generally covariant theories formulated in phase space. Time is not frozen. Diffeomorphism… (More)

We discuss the mechanism of truncations driven by the imposition of constraints. We show how the consistency of such truncations is controlled, and give general theorems that establish conditions for… (More)

Dirac’s approach to gauge symmetries is discussed. We follow closely the steps that led him from his conjecture concerning the generators of gauge transformations at a given time —to be contrasted… (More)

We study the thermodynamics and the jet quenching parameter of a black hole solution dual to a SQCD-like plasma which includes the backreaction of fundamental flavors. The free energy is calculated… (More)

We explore the string spectrum in the Witten QCD 4 model by considering classical string configurations, thereby obtaining energy formulas for quantum states with large excitation quantum numbers… (More)