Ising analogs of quantum spin chains with multispin interactions

FC Alcaraz, RA Pimenta, J Sirker - Physical Review B, 2023 - APS
A new family of free fermionic quantum spin chains with multispin interactions was recently
introduced. Here we show that it is possible to build standard quantum Ising chains—but …

Entanglement as geometry and flow

S Singha Roy, SN Santalla, J Rodríguez-Laguna… - Physical Review B, 2020 - APS
We explore the connection between the area law for entanglement and geometry by
representing the entanglement entropies corresponding to all 2 N bipartitions of an N-party …

Piercing the rainbow state: Entanglement on an inhomogeneous spin chain with a defect

N Samos Sáenz de Buruaga, SN Santalla… - Physical Review B, 2020 - APS
The rainbow state denotes a set of valence bond states organized concentrically around the
center of a spin 1/2 chain. It is the ground state of an inhomogeneous XX Hamiltonian and …

Entanglement links and the quasiparticle picture

SN Santalla, G Ramírez, SS Roy, G Sierra… - Physical Review B, 2023 - APS
The time evolution of a quantum state with short-range correlations after a quench to a one-
dimensional critical Hamiltonian can be understood using the quasiparticle picture, which …

Entanglement in noncritical inhomogeneous quantum chains

N Samos Sáenz de Buruaga, SN Santalla… - Physical Review B, 2021 - APS
We study an inhomogeneous critical Ising chain in a transverse field whose couplings decay
exponentially from the center. In the strong inhomogeneity limit, we apply Fisher's …

Link representation of the entanglement entropies for all bipartitions

SS Roy, SN Santalla, G Sierra… - Journal of Physics A …, 2021 - iopscience.iop.org
We have recently shown that the entanglement entropy of any bipartition of a quantum state
can be approximated as the sum of certain link strengths connecting internal and external …

Depletion in fermionic chains with inhomogeneous hoppings

B Mula, N Samos Sáenz de Buruaga, G Sierra… - Physical Review B, 2022 - APS
The ground state of a free-fermionic chain with inhomogeneous hoppings at half-filling can
be mapped into the Dirac vacuum on a static curved space-time, which presents exactly …

Exotic correlation spread in free-fermionic states with initial patterns

S Singha Roy, G Ramírez, SN Santalla, G Sierra… - Physical Review B, 2022 - APS
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 at half …

[HTML][HTML] Using Kondo entanglement to induce spin correlations between disconnected quantum dots

CA Büsser - Journal of Applied Physics, 2024 - pubs.aip.org
We investigate the entanglement between the spins of two quantum dots that are not
simultaneously connected to the same system. Quantum entanglement among localized …

Emergent geometry from entanglement structure

SS Roy, SN Santalla, J Rodríguez-Laguna… - Quantum Theory and …, 2021 - Springer
We attempt to reveal the geometry, emerged from the entanglement structure of any general
N-party pure quantum many-body state by representing entanglement entropies …