3 papers
quant-ph2026
Extracting conformal data from Loschmidt echoes after critical quenches
Aleix Bou-Comas, Stefano Carignano, Sergio Cerezo-Roquebrún +2
Conformal field theory provides universal predictions for Loschmidt amplitudes following quenches from product states to critical Hamiltonians. Building on this observation, we dev…
quant-ph2024
Efficient Eigenstate Preparation in an Integrable Model with Hilbert Space Fragmentation
Roberto Ruiz, Alejandro Sopena, Balázs Pozsgay +1
We consider the preparation of all the eigenstates of spin chains using quantum circuits. It is known that generic eigenstates of free-fermionic spin chains can be prepared with ci…
quant-ph2024
Bethe Ansatz, Quantum Circuits, and the F-basis
Roberto Ruiz, Alejandro Sopena, Esperanza López +2
The Bethe Ansatz is a method for constructing exact eigenstates of quantum-integrable spin chains. Recently, deterministic quantum algorithms, referred to as "algebraic Bethe circu…