Variational Matrix Product Operators for the Steady State of Dissipative Quantum Systems

摘要: We present a new variational method based on the matrix product operator (MPO) ansatz, for finding steady state of dissipative quantum chains governed by master equations Lindblad form. Instead requiring an accurate representation system evolution until stationary is attained, algorithm directly targets final state, thus, allowing faster convergence when MPO with small bond dimension. Our numerical simulations several spin models over wide range parameters illustrate performance and show that, indeed, often well described very moderate dimensions.