121 citations · 3.6k across the 201 of their papers we have counts for
204 papers
Quasi-Hermitian quantum mechanics and a new class of user-friendly matrix Hamiltonians
Olaf Lechtenfeld, Miloslav Znojil
In the conventional Schrödinger's formulation of quantum mechanics the unitary evolution of a state is controlled, in Hilbert space , by a Hamiltonian …
A Casimir operator for a Calogero algebra
Francisco Correa, Gonzalo Leal, Olaf Lechtenfeld +1
We investigate the nonlinear algebra generated by the 9 functionally independent permutation-symmetric operators in the three-particle rational quantum Calogero model. Decoup…
Exact gauge fields from anti-de Sitter space
Savan Hirpara, Kaushlendra Kumar, Olaf Lechtenfeld +1
In 1977 Lüscher found a class of SO(4)-symmetric SU(2) Yang-Mills solutions in Minkowski space, which have been rederived 40 years later by employing the isometry $S^3\cong\mathrm{…
An improved Nicolai map for super Yang-Mills theory
Olaf Lechtenfeld, Maximilian Rupprecht
Adding a topological theta term to the action of super Yang-Mills theory modifies its Nicolai map. For the BPS value of the theta angle a chiral version…
Supersymmetric large-order perturbation with the Nicolai map
Olaf Lechtenfeld
In rigidly supersymmetric quantum theories, the Nicolai map allows one to turn on a coupling constant (from zero to a finite value) by keeping the (free) functional integration mea…
Is the Nicolai map unique?
Olaf Lechtenfeld, Maximilian Rupprecht
The Nicolai map is a field transformation that relates supersymmetric theories at finite couplings with the free theory at . It is obtained via an ordered exponential of t…