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19932026
Showing 2017 · math-phShow all

6 papers · 2 filters

math-ph2017★ 3 cited

Uniform analytic approximation of Wigner rotation matrices

Scott E. Hoffmann

We derive the leading asymptotic approximation, for low angle θ, of the Wigner rotation matrix elements , uniform in and . The result is in terms of a…

math-ph2017★ 7 cited

Algebraic calculations for spectrum of superintegrable system from exceptional orthogonal polynomials

Md Fazlul Hoque, Ian Marquette, Sarah Post +1

We introduce an extended Kepler-Coulomb quantum model in spherical coordinates. The Schrödinger equation of this Hamiltonian is solved in these coordinates and it is shown that the…

math-ph2017

Non-classical behaviour of coherent states for systems constructed using exceptional orthogonal polynomials

Scott E. Hoffmann, Véronique Hussin, Ian Marquette +1

We construct the coherent states and Schrödinger cat states associated with new types of ladder operators for a particular case of a rationally extended harmonic oscillator involvi…

math-ph2017★ 10 cited

A differential operator realisation approach for constructing Casimir operators of non-semisimple Lie algebras

Fahad Alshammari, Phillip S. Isaac, Ian Marquette

We introduce a search algorithm that utilises differential operator realisations to find polynomial Casimir operators of Lie algebras. To demonstrate the algorithm, we look at two…

math-ph2017★ 4 cited

Reduced Wigner coefficients for Lie superalgebra gl(m|n) corresponding to unitary representations and beyond

Jason L. Werry, Phillip S. Isaac, Mark D. Gould

In this paper fundamental Wigner coefficients are determined algebraically by considering the eigenvalues of certain generalized Casimir invariants. Here this method is applied in…

math-ph2017★ 33 cited

Fourth order Superintegrable systems separating in Cartesian coordinates I. Exotic quantum potentials

Ian Marquette, Masoumeh Sajedi, Pavel Winternitz

A study is presented of two-dimensional superintegrable systems separating in Cartesian coordinates and allowing an integral of motion that is a fourth order polynomial in the mome…