6 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…
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
Ãngel Ballesteros, Romina RamÃrez, 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…