19 papers · 1 filter
Quantum work statistics and coherence effects in quenched bosonic Josephson junctions
Mattia Orlandini, Stefano Gherardini, Lorenzo Buffoni +1
We investigate the non-equilibrium work statistics originating from a sudden quench in a bosonic Josephson junction. In particular, by employing the Holstein-Primakoff approximatio…
Revealing the topology of quantum states via Kirkwood-Dirac quasiprobabilities
Stefano Gherardini, Luca Lepori
We discuss a theoretical approach to discriminate whether two states of a many-body quantum system belong or not to different topology classes. This approach is based on expressing…
Nonclassical energy-change distribution as a witness of non-Markovian quantum dynamics
Marco Pezzutto, Anton Corr, Gabriele De Chiara +2
We address the problem of identifying non-Markovian quantum time evolutions of an open quantum system by only performing measurements of the system's energy. We demonstrate that vi…
Squeezing and adiabaticity breaking in time-dependent quantum harmonic oscillators
Mattia Orlandini, Beatrice Donelli, Lorenzo Buffoni +1
The quantum harmonic oscillator with time-dependent frequency is a paradigmatic model of driven quantum dynamics and one of the few nontrivial systems that admits an exact analytic…
Nonequilibrium thermometry via an ensemble of initially correlated qubits
Enrico Trombetti, Marco Malitesta, Marco Pezzutto +1
We investigate a nonequilibrium quantum thermometry protocol in which an ensemble of qubits, acting as temperature probes, is weakly coupled to a macroscopic thermal bath. The temp…
Operational criterion for Wigner function negativity
Paolo Solinas, Beatrice Donelli, Stefano Gherardini
We introduce an operational criterion to identify Wigner function (WF) negativity for an arbitrary quantum state within the framework of quantum non-demolition measurements. This c…