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2016

2016

We identify the symmetry underlying the recently observed spectral-parameter transformations of holographic Wilson loops alias… Expand

2013

2013

New ladder operators are constructed for a rational extension of the harmonic oscillator associated with type III Hermite… Expand

Highly Cited

2010

Highly Cited

2010

The purpose of this paper is to extend J.C. Willems' theory of dissipative systems to open quantum systems described by quantum… Expand

2004

2004

Ladder operators can be constructed for all potentials that present the integrability condition known as shape invariance… Expand

Highly Cited

2003

Highly Cited

2003

In this paper, we extend the theory of discrete orthogonal polynomials (on a linear lattice) to polynomials satisfying… Expand

2003

2003

We discuss some results from q-series that can account for the foundations for the introduction of orthogonal polynomials on the… Expand

2003

2003

The lowering operator @s and the raising operator @t, associated with a polynomial set {P"n}"n"="0^~, are two operators which are… Expand

2001

2001

The construction of Generalized Intelligent States (GIS) for the x4-anharmonic oscillator is presented. These GIS families are… Expand

Highly Cited

1993

Highly Cited

1993

The spectrum of a one-dimensional chain of $SU(n)$ spins positioned at the static equilibrium positions of the particles in a… Expand