Critical behavior of dissipative two-dimensional spin lattices
| Autor: | Riccardo Rota, Cristiano Ciuti, Rosario Fazio, Nicola Bartolo, F. Storme |
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| Přispěvatelé: | Rota, R., Storme, F., Bartolo, N., Fazio, Rosario, Ciuti, Cristiano, Fazio, R., Ciuti, C. |
| Rok vydání: | 2017 |
| Předmět: |
Physics
Density matrix Quantum Physics Condensed matter physics FOS: Physical sciences Von Neumann entropy Quantum entanglement 01 natural sciences 010305 fluids & plasmas Condensed Matter - Other Condensed Matter Renormalization Critical point (thermodynamics) Quantum mechanics 0103 physical sciences Master equation Dissipative system Condensed Matter::Strongly Correlated Electrons Quantum Physics (quant-ph) 010306 general physics Critical exponent Other Condensed Matter (cond-mat.other) |
| Zdroj: | Physical Review B 95 (2017). doi:10.1103/PhysRevB.95.134431 info:cnr-pdr/source/autori:Rota R.; Storme F.; Bartolo N.; Fazio R.; Ciuti C./titolo:Critical behavior of dissipative two-dimensional spin lattices/doi:10.1103%2FPhysRevB.95.134431/rivista:Physical Review B/anno:2017/pagina_da:/pagina_a:/intervallo_pagine:/volume:95 |
| Popis: | We explore critical properties of two-dimensional lattices of spins interacting via an anisotropic Heisenberg Hamiltonian and subject to incoherent spin flips. We determine the steady-state solution of the master equation for the density matrix via the corner-space renormalization method. We investigate the finite-size scaling and critical exponent of the magnetic linear susceptibility associated to a dissipative ferromagnetic transition. We show that the Von Neumann entropy increases across the critical point, revealing a strongly mixed character of the ferromagnetic phase. Entanglement is witnessed by the quantum Fisher information which exhibits a critical behavior at the transition point, showing that quantum correlations play a crucial role in the transition even though the system is in a mixed state. Accepted for publication on Phys. Rev. B (6 pages, 5 figures) |
| Databáze: | OpenAIRE |
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