3 papers
quant-ph2025
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…
quant-ph2025
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…
quant-ph2018
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…