6 citations · 14 across the 9 of their papers we have counts for
9 papers
Driving collective RPA modes by a time-dependent Dyson map
Andreas Fring, Marta Reboiro
We study a time-dependent non-Hermitian generalisation of the Schütte-Da~Providência model describing a bosonic mode coupled to collective particle-hole excitations. Using a time-d…
Out-of-time-order correlators for Swanson Hamiltonian with interaction terms
M. W. AlMasri, Marta Reboiro
In this work, we compute the out-of-time-ordered correlator (OTOC) for canonical position and momentum operators across a hierarchy of non-Hermitian oscillator models: the exactly…
Bounded Dyson maps and cavity-driven transitions in a time-dependent non-Hermitian spin-boson model
Andreas Fring, Marta Reboiro
We study a time-dependent non-Hermitian extension of the Schütte-Da Providência spin-boson Hamiltonian with complex couplings. A time-dependent Dyson map relates the model to a Her…
Uncertainty inequalities in a non-Hermitian scenario
Yanet Alvarez, Mariela Portesi, Romina Ramirez +1
We investigate uncertainty relations for quantum observables evolving under non-Hermitian Hamiltonians, with particular emphasis on the role of metric operators. By constructing ap…
A Pseudo-Hermitian Hybrid Model at Finite Temperature: The Role of the Exceptional Points
Ignacio Fushimi, Marta Reboiro
We study a hybrid system formed by an ensemble of colour nitrogen-vacancy centres in diamond interacting with a superconducting flux-qubit at finite temperature. The presence of im…
Non-standard quantum algebras and infinite-dimensional PT-symmetric systems
Ángel Ballesteros, Romina Ramírez, Marta Reboiro
In this work, we introduce a PT-symmetric infinite-dimensional representation of the Uz(sl(2,R)) Hopf algebra, and we analyse a multiparametric family of Hamiltonians constructed f…
Complex Scaling Method applied to the study of the Swanson Hamiltonian in the broken PT-symmetry phase
Viviano Fernández, Romina Ramírez, Marta Reboiro
In this work, we study the non-PT symmetry phase of the Swanson Hamiltonian in the framework of the Complex Scaling Method. By constructing a bi-orthogonality relation, we apply th…
Optimal Spin Squeezed Steady State induced by the dynamics of non-hermtian hamiltonians
R. Ramirez, M. Reboiro
In this work, we study the time evolution of a coherent spin state under the action of a non-hermitian hamiltonian. The hamiltonian is modeled by a one-axis twisting term plus a Li…
Effective su_q(2) models and polynomial algebras for fermion-boson Hamiltonians
Angel Ballesteros, Osvaldo Civitarese, Francisco J. Herranz +1
Schematic su(2)+h3 interaction Hamiltonians, where su(2) plays the role of the pseudo-spin algebra of fermion operators and h3 is the Heisenberg algebra for bosons, are shown to be…