Cluster Mean-Field Approach to the Steady-State Phase Diagram of Dissipative Spin Systems
| Autor: | Rosario Fazio, Leonardo Mazza, Alberto Biella, Davide Rossini, Jiasen Jin, Oscar Viyuela, Jonathan Keeling |
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| Přispěvatelé: | EPSRC, University of St Andrews. School of Physics and Astronomy, University of St Andrews. Condensed Matter Physics, Jin, Jiasen, Biella, Alberto, Viyuela, Oscar, Mazza, Leonardo, Keeling, Jonathan, Fazio, Rosario, Rossini, Davide |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
Phase transition
QC1-999 FOS: Physical sciences General Physics and Astronomy 01 natural sciences 010305 fluids & plasmas Physics and Astronomy (all) symbols.namesake 0103 physical sciences Cluster (physics) Physics::Atomic Physics 010306 general physics Spin (physics) Computer Science::Databases Condensed Matter - Statistical Mechanics R2C QC Phase diagram Physics Quantum Physics Steady state Statistical Mechanics (cond-mat.stat-mech) Condensed matter physics DAS QC Physics Mean field theory Rydberg formula symbols Dissipative system Quantum Physics (quant-ph) BDC |
| Zdroj: | Physical Review X, Vol 6, Iss 3, p 031011 (2016) Physical Review X Physical review. X 6 (2016). doi:10.1103/PhysRevX.6.031011 info:cnr-pdr/source/autori:Jin J.; Biella A.; Viyuela O.; Mazza L.; Keeling J.; Fazio R.; Rossini D./titolo:Cluster mean-field approach to the steady-state phase diagram of dissipative spin systems/doi:10.1103%2FPhysRevX.6.031011/rivista:Physical review. X/anno:2016/pagina_da:/pagina_a:/intervallo_pagine:/volume:6 |
| ISSN: | 2160-3308 |
| Popis: | We show that short-range correlations have a dramatic impact on the steady-state phase diagram of quantum driven-dissipative systems. This effect, never observed in equilibrium, follows from the fact that ordering in the steady state is of dynamical origin, and is established only at very long times, whereas in thermodynamic equilibrium it arises from the properties of the (free) energy. To this end, by combining the cluster methods extensively used in equilibrium phase transitions to quantum trajectories and tensor-network techniques, we extend them to nonequilibrium phase transitions in dissipative many-body systems. We analyze in detail a model of spin-1=2 on a lattice interacting through an XYZ Hamiltonian, each of them coupled to an independent environment that induces incoherent spin flips. In the steady-state phase diagram derived from our cluster approach, the location of the phase boundaries and even its topology radically change, introducing reentrance of the paramagnetic phase as compared to the single-site mean field where correlations are neglected. Furthermore, a stability analysis of the cluster mean field indicates a susceptibility towards a possible incommensurate ordering, not present if short-range correlations are ignored. Published version. 18 pages, 15 figures |
| Databáze: | OpenAIRE |
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