Year: 2018
Type: article
Abstract: We propose a generalization of the linked-cluster expansions to study driven-dissipative quantum lattice models, directly accessing the thermodynamic limit of the system. Our method leads to the evaluation of the desired extensive property onto small connected clusters of a given size and topology. We first test this approach on the isotropic spin-1/2 Hamiltonian in two dimensions, where each spin is coupled to an independent environment that induces incoherent spin flips. Then we apply it to the study of an anisotropic model displaying a dissipative phase transition from a magnetically ordered to a disordered phase. By means of a Pad\'e analysis on the series expansions for the average magnetization, we provide a viable route to locate the phase transition and to extrapolate the critical exponent for the magnetic susceptibility.
Institutions: Centre National de la Recherche Scientifique, Sorbonne Paris Cité, Laboratoire Matériaux et Phénomènes Quantiques, Université Paris Diderot, Dalian University of Technology, Harvard University, Massachusetts Institute of Technology, The Abdus Salam International Centre for Theoretical Physics (ICTP), Scuola Normale Superiore, Istituto Nanoscienze, National Enterprise for NanoScience and NanoTechnology, University of Pisa, Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
Language: English
Topic: Quantum many-body systems
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
Awards: G3029701843, G5432009785, G7111874358
OpenAlex ID: W2750915500