63 citations · 223 across the 8 of their papers we have counts for
8 papers
Exotic correlation spread in free-fermionic states with initial patterns
Sudipto Singha Roy, Giovanni Ramírez, Silvia N. Santalla +2
We describe a relation between the light-cone velocities after a quantum quench and the internal structure of the initial state, in the particular case of free fermions on a chain…
Breaking the Area Law: The Rainbow State
Giovanni Ramírez, Javier Rodríguez-Laguna, Germán Sierra
An exponential deformation of a 1D critical Hamiltonian, with couplings falling on a length scale , gives rise to ground states whose entanglement entropy follows a volume…
Quantum Entanglement In Inhomogeneous 1D Systems
Giovanni Ramírez
The entanglement entropy of the ground state of a quantum lattice model with local interactions usually satisfies an area law. However, in 1D systems some violations may appear in…
More on the rainbow chain: entanglement, space-time geometry and thermal states
Javier Rodríguez-Laguna, Jérôme Dubail, Giovanni Ramírez +2
The rainbow chain is an inhomogenous exactly solvable local spin model that, in its ground state, displays a half-chain entanglement entropy growing linearly with the system size.…
Entanglement in correlated random spin chains, RNA folding and kinetic roughening
Javier Rodríguez-Laguna, Silvia N. Santalla, Giovanni Ramírez +1
Average block entanglement in the 1D XX-model with uncorrelated random couplings is known to grow as the logarithm of the block size, in similarity to conformal systems. In this wo…
Entanglement over the rainbow
Giovanni Ramírez, Javier Rodríguez-Laguna, Germán Sierra
In one dimension the area law for the entanglement entropy is violated maximally by the ground state of a strong inhomogeneous spin chain, the so called concentric singlet phase (C…
From conformal to volume-law for the entanglement entropy in exponentially deformed critical spin 1/2 chains
Giovanni Ramírez, Javier Rodríguez-Laguna, Germán Sierra
An exponential deformation of 1D critical Hamiltonians gives rise to ground states whose entanglement entropy satisfies a volume-law. This effect is exemplified in the XX and Heise…
Entanglement in low-energy states of the random-hopping model
Giovanni Ramírez, Javier Rodríguez-Laguna, Germán Sierra
We study the low-energy states of the 1D random-hopping model in the strong disordered regime. The entanglement structure is shown to depend solely on the probability distribution…