233 citations · 1.8k across the 66 of their papers we have counts for
4 papers · 1 filter
Dynamics of entanglement entropy and entanglement spectrum crossing a quantum phase transition
Elena Canovi, Elisa Ercolessi, Piero Naldesi +2
We study the time evolution of entanglement entropy and entanglement spectrum in a finite-size system which crosses a quantum phase transition at different speeds. We focus on the…
Null Phase Curves and Manifolds in Geometric Phase Theory
S. Chaturvedi, E. Ercolessi, G. Morandi +4
Bargmann invariants and null phase curves are known to be important ingredients in understanding the essential nature of the geometric phase in quantum mechanics. Null phase manifo…
Modular invariance in the gapped XYZ spin 1/2 chain
Elisa Ercolessi, Stefano Evangelisti, Fabio Franchini +1
We show that the elliptic parametrization of the coupling constants of the quantum XYZ spin chain can be analytically extended outside of their natural domain, to cover the whole p…
Symmetric logarithmic derivative for general n-level systems and the quantum Fisher information tensor for three-level systems
Elisa Ercolessi, Michele Schiavina
Within a geometrical context, we derive an explicit formula for the computation of the symmetric logarithmic derivative for arbitrarily mixed quantum systems, provided that the str…