79 citations · 246 across the 11 of their papers we have counts for
11 papers
Atom-Photon Bound States in Fractal Photonic Lattices: Localization Length and Anomalous Diffusion
Florian Bönsel, Flore K. Kunst, Federico Roccati
We study atom-photon bound states seeded by two-level emitters coupled to self-similar photonic lattices. By expressing the photonic Green's function through the heat kernel, we sh…
Many-body quantum optics in a Bose-Hubbard waveguide
Federico Roccati
Waveguide quantum electrodynamics (QED) studies the interaction between quantum emitters and guided photons in one-dimension. When the waveguide hosts interacting photons, it becom…
Finite steady-state current defies non-Hermitian many-body localization
Pietro Brighi, Marko Ljubotina, Federico Roccati +1
Non-Hermitian many-body localization (NH MBL) has emerged as a possible scenario for stable localization in open systems, as suggested by spectral indicators identifying a putative…
Two transitions in complex eigenvalue statistics: Hermiticity and integrability breaking
G. Akemann, F. Balducci, A. Chenu +3
Open quantum systems have complex energy eigenvalues which are expected to follow non-Hermitian random matrix statistics when chaotic, or 2-dimensional (2d) Poisson statistics when…
Diagnosing non-Hermitian Many-Body Localization and Quantum Chaos via Singular Value Decomposition
Federico Roccati, Federico Balducci, Ruth Shir +1
Strong local disorder in interacting quantum spin chains can turn delocalized eigenmodes into localized eigenstates, giving rise to many-body localized (MBL) phases. This is accomp…
Hermitian and Non-Hermitian Topology from Photon-Mediated Interactions
Federico Roccati, Miguel Bello, Zongping Gong +4
Light can mediate effective dipole-dipole interactions between atoms or quantum emitters coupled to a common environment. Exploiting them to tailor a desired effective Hamiltonian…
Quantum correlations beyond entanglement in a classical-channel model of gravity
Federico Roccati, Benedetto Militello, Emilio Fiordilino +4
A direct quantization of the Newtonian interaction between two masses is known to establish entanglement, which if detected would witness the quantum nature of the gravitational fi…
Non-Hermitian physics and master equations
Federico Roccati, G. Massimo Palma, Fabio Bagarello +1
A longstanding tool to characterize the evolution of open Markovian quantum systems is the GKSL (Gorini-Kossakowski-Sudarshan-Lindblad) master equation. However, in some cases, ope…
Exotic interactions mediated by a non-Hermitian photonic bath
Federico Roccati, Salvatore Lorenzo, Giuseppe Calajò +3
Photon-mediated interactions between quantum emitters in engineered photonic baths is an emerging area of quantum optics. At the same time, non-Hermitian (NH) physics is currently…
Quantum correlations in -symmetric systems
Federico Roccati, Salvatore Lorenzo, G. Massimo Palma +3
We study the dynamics of correlations in a paradigmatic setup to observe -symmetric physics: a pair of coupled oscillators, one subject to a gain one to a loss. Start…
Stationary quantum correlations in a system with mean-field PT symmetry
Federico Roccati, Salvatore Lorenzo, G. Massimo Palma +1
A pair of coupled quantum harmonic oscillators, one subject to a gain one to a loss, is a paradigmatic setup to implement PT-symmetric, non-Hermitian Hamiltonians in that one such…