41 citations · 461 across the 30 of their papers we have counts for
5 papers · 1 filter
Quantum phase transitions for an integrable quantum Rabi-like model with two interacting qubits
Roberto Grimaudo, Antonio S. M. de Castro, Antonino Messina +2
A two-interacting-qubit quantum Rabi-like model with vanishing transverse fields on the qubit-pair is studied. Independently of the coupling regime, this model can be exactly and u…
Spin-spin coupling-based quantum and classical phase transitions in two-impurity spin-boson models
Roberto Grimaudo, Antonino Messina, Hiromichi Nakazato +2
The class of two-interacting-impurity spin-boson models with vanishing transverse fields on the spin-pair is studied. The model can be exactly mapped into two independent standard…
Axion-induced oscillations in Josephson qubits
Roberto Grimaudo, Claudio Guarcello, Giovanni Filatrella +2
An effective quantum description of the axion is proposed as a two-level dynamic system together with a spin-spin Hamiltonian for a coupled axion-Josephson qubit system. The intera…
Spin-chain-star systems: entangling multiple chains of spin qubits
R. Grimaudo, A. S. M. de Castro, A. Messina +1
We consider spin-chain-star systems characterized by N-wise many-body interactions between the spins in each chain and the central one. We show that such systems can be exactly map…
Josephson junction-based axion detection through resonant activation
Roberto Grimaudo, Davide Valenti, Bernardo Spagnolo +2
We discuss the resonant activation phenomenon on a Josephson junction due to the coupling of the Josephson system with axions. We show how such an effect can be exploited for axion…