Zobrazeno 1 - 10
of 89
pro vyhledávání: '"Capizzi, Luca"'
Autor:
Capizzi, Luca, Mazzoni, Michele
Quantum one-dimensional systems in their ordered phase admit kinks as elementary excitations above their symmetry-broken vacua. While the scattering properties of the kinks resemble those of quasiparticles, they have distinct locality features that a
Externí odkaz:
http://arxiv.org/abs/2409.03048
The eigenstate thermalization hypothesis (ETH) describes the properties of diagonal and off-diagonal matrix elements of local operators in the eigenenergy basis. In this work, we propose a relation between (i) the singular behaviour of the off-diagon
Externí odkaz:
http://arxiv.org/abs/2405.16975
Energy-filtered quantum states are promising candidates for efficiently simulating thermal states. We explore a protocol designed to transition a product state into an eigenstate located in the middle of the spectrum; this is achieved by gradually re
Externí odkaz:
http://arxiv.org/abs/2405.02158
Autor:
Capizzi, Luca, Rotaru, Andrei
Publikováno v:
JHEP05 (2024) 010
We consider a quantum junction described by a 1+1-dimensional boundary conformal field theory (BCFT). Our analysis focuses on correlations emerging at finite temperature, achieved through the computation of entanglement measures. Our approach relies
Externí odkaz:
http://arxiv.org/abs/2312.08275
Autor:
Capizzi, Luca, Vitale, Vittorio
Symmetry breaking is a fundamental concept in understanding quantum phases of matter, studied so far mostly through the lens of local order parameters. Recently, a new entanglement-based probe of symmetry breaking has been introduced under the name o
Externí odkaz:
http://arxiv.org/abs/2310.01962
Autor:
Capizzi, Luca, Mazzoni, Michele
Publikováno v:
JHEP 2023, 144 (2023)
Global symmetries of quantum many-body systems can be spontaneously broken. Whenever this mechanism happens, the ground state is degenerate and one encounters an ordered phase. In this study, our objective is to investigate this phenomenon by examini
Externí odkaz:
http://arxiv.org/abs/2307.12127
When a free Fermi gas on a lattice is subject to the action of a linear potential it does not drift away, as one would naively expect, but it remains spatially localized. Here we revisit this phenomenon, known as Stark localization, within the recent
Externí odkaz:
http://arxiv.org/abs/2303.14059
Autor:
Capizzi, Luca, Eisler, Viktor
We consider a free-fermion chain with a conformal defect that features an extended zero mode, and study the entanglement properties in its mixed ground state. The zero-mode induced degeneracy modifies the density of states in the single-particle enta
Externí odkaz:
http://arxiv.org/abs/2303.10425
Publikováno v:
J. Stat. Mech. (2023) 073102
We consider the ground state of two species of one-dimensional critical free theories coupled together via a conformal interface. They have an internal $U(1)$ global symmetry and we investigate the quantum fluctuations of the charge across the impuri
Externí odkaz:
http://arxiv.org/abs/2302.08209
In two recent works, we studied the symmetry resolved R\'enyi entropies of quasi-particle excited states in quantum field theory. We found that the entropies display many model-independent features which we discussed and analytically characterised. I
Externí odkaz:
http://arxiv.org/abs/2302.02666