41 citations · 157 across the 13 of their papers we have counts for
12 papers
Non-standard quantum algebras and finite dimensional -symmetric systems
Ángel Ballesteros, Romina Ramírez, Marta Reboiro
In this work, -symmetric Hamiltonians defined on quantum algebras are presented. We study the spectrum of a family of non-Hermitian Hamiltonians wr…
Phase transitions and thermodynamic cycles in the broken PT-regime
Andreas Fring, Marta Reboiro
We propose a new type of quantum thermodynamic cycle whose efficiency is greater than the one of the classical Carnot cycle for the same conditions for a system when viewed as homo…
Psedo-hermitian Hamiltonians at finite temperature
Romina Ramírez, Marta Reboiro
The Double Green Function Formalism has been extensively used in dealing with the thermodynamics of quantum systems which evolved in time under the action of a given self-adjoint H…
Swanson Hamiltonian: non-PT-symmetry phase
V. Fernández, R. Ramírez, M. Reboiro
In this work, we study the non-hermitian Swanson hamiltonian, particularly the non-PT symmetry phase. We use the formalism of Gel'fand triplet to construct the generalized eigenfun…
Excepional Points from Hamiltonians of hybrid physical systems: Squeezing and anti-Squeezing
Romina Ramirez, Marta Reboiro, Diego Tielas
We study the appearance of Exceptional Points in a hybrid system composed of a superconducting flux-qubit and an ensemble of nitrogen-vacancy colour centres in diamond. We discuss…
Dynamics of finite dimensional non-hermitian systems with indefinite metric
R. Ramirez, M. Reboiro
We discuss the time evolution of physical finite dimensional systems which are modelled by non-hermitian Hamiltonians. We address both general non-hermitian Hamiltonians and pseudo…