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30 papers · 2 filters
Sensing microscopic noise events by frequent quantum measurements
Salvatore Virzì, Laura T. Knoll, Alessio Avella +8
We propose and experimentally demonstrate a general method allowing us to unravel microscopic noise events that affect a continuous quantum variable. Such unraveling is achieved by…
Spectral Analysis of Quantum Field Fluctuations in a Strongly Coupled Optomechanical System
A. Ranfagni, F. Marino, F. Marin
With a levitodynamics experiment in the strong and coherent quantum optomechanical coupling regime, we demonstrate that the oscillator acts as a broadband quantum spectrum analyzer…
Quantum state purity versus average phonon number for characterization of mechanical oscillators in cavity optomechanics
K. Børkje, F. Marin
Quantum oscillators in Gaussian states are often characterized by average occupation numbers that refer to a basis of eigenstates of the non-interacting oscillator Hamiltonian. We…
Theory for Equivariant Quantum Neural Networks
Quynh T. Nguyen, Louis Schatzki, Paolo Braccia +5
Quantum neural network architectures that have little-to-no inductive biases are known to face trainability and generalization issues. Inspired by a similar problem, recent breakth…
Stochastic entropy production: Fluctuation relation and irreversibility mitigation in non-unital quantum dynamics
Eliana Fiorelli, Stefano Gherardini, Stefano Marcantoni
In this work, we study the stochastic entropy production in open quantum systems whose time evolution is described by a class of non-unital quantum maps. In particular, as in [Phys…
Diagnostics of quantum-gate coherences via end-point-measurement statistics
Ilaria Gianani, Alessio Belenchia, Stefano Gherardini +3
Quantum coherence is a central ingredient in quantum physics with several theoretical and technological ramifications. In this work we consider a figure of merit encoding the infor…