Publicación: Piercing the rainbow state: Entanglement on an inhomogeneous spin chain with a defect
| dc.contributor.author | Sáenz de Buruaga, Nadir Samos | |
| dc.contributor.author | Santalla, Silvia N. | |
| dc.contributor.author | Sierra, Germán | |
| dc.contributor.author | Rodríguez Laguna, Javier | |
| dc.date.accessioned | 2024-05-20T11:28:10Z | |
| dc.date.available | 2024-05-20T11:28:10Z | |
| dc.date.issued | 2021-05-15 | |
| dc.description.abstract | 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 presents a maximal violation of the area law of entanglement entropy. Here, we add a tunable exchange coupling constant at the center, γ , and show that it induces entanglement transitions of the ground state. At very strong inhomogeneity, the rainbow state survives for 0≤γ≤1 , while outside that region the ground state is a product of dimers. In the weak inhomogeneity regime, the entanglement entropy satisfies a volume law, derived from CFT in curved space-time, with an effective central charge that depends on the inhomogeneity parameter and γ . In all regimes we have found that the entanglement properties are invariant under the transformation γ ⟷ 1 − γ , whose fixed point γ = 1 / 2 corresponds to the usual rainbow model. Finally, we study the robustness of nontrivial topological phases in the presence of the defect. | en |
| dc.description.version | versión publicada | |
| dc.identifier.doi | http://doi.org/10.1103/PhysRevB.101.205121 | |
| dc.identifier.issn | 2469-9969 | |
| dc.identifier.uri | https://hdl.handle.net/20.500.14468/12053 | |
| dc.journal.title | PHYSICAL REVIEW B | |
| dc.journal.volume | 101 | |
| dc.language.iso | en | |
| dc.publisher | American Physical Society | |
| dc.relation.center | Facultad de Ciencias | |
| dc.relation.department | Física Fundamental | |
| dc.rights | info:eu-repo/semantics/openAccess | |
| dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0 | |
| dc.title | Piercing the rainbow state: Entanglement on an inhomogeneous spin chain with a defect | es |
| dc.type | journal article | en |
| dc.type | artículo | es |
| dspace.entity.type | Publication | |
| relation.isAuthorOfPublication | f24eca7b-6fab-4a61-b10e-eb2f58e6342b | |
| relation.isAuthorOfPublication.latestForDiscovery | f24eca7b-6fab-4a61-b10e-eb2f58e6342b |