61 citations · 86 across the 4 of their papers we have counts for
6 papers · 1 filter
Standard quantum annealing outperforms adiabatic reverse annealing with decoherence
Gianluca Passarelli, Ka-Wa Yip, Daniel A. Lidar +1
We study adiabatic reverse annealing (ARA) in an open system. In the closed system (unitary) setting, this annealing protocol allows avoidance of first-order quantum phase transiti…
Optimal parent Hamiltonians for time-dependent states
Davide Rattacaso, Gianluca Passarelli, Antonio Mezzacapo +2
Given a generic time-dependent many-body quantum state, we determine the associated parent Hamiltonian. This procedure may require, in general, interactions of any sort. Enforcing…
Counterdiabatic driving in the quantum annealing of the -spin model: a variational approach
Gianluca Passarelli, Vittorio Cataudella, Rosario Fazio +1
Finding the exact counterdiabatic potential is, in principle, particularly demanding. Following recent progresses about variational strategies to approximate the counterdiabatic op…
Reverse quantum annealing of the -spin model with relaxation
Gianluca Passarelli, Ka-Wa Yip, Daniel A. Lidar +2
In reverse quantum annealing, the initial state is an eigenstate of the final problem Hamiltonian and the transverse field is cycled rather than strictly decreased as in standard (…
May a dissipative environment be beneficial for quantum annealing?
Gianluca Passarelli, Giulio De Filippis, Vittorio Cataudella +1
We discuss the quantum annealing of the fully-connected ferromagnetic -spin model in a dissipative environment at low temperature. This model, in the large limit, encode…
Beyond the Born-Markov approximation: dissipative dynamics of a single qubit
Loris Maria Cangemi, Gianluca Passarelli, Vittorio Cataudella +2
We propose a numerical technique based on a combination of short-iterative Lanczos and exact diagonalization methods, suitable for simulating the time evolution of the reduced dens…