Iqbal, Y.; Thomale, R.; Parisen Toldin, F.; Rachel, S.; Reuther, J.: Functional renormalization group for three-dimensional quantum magnetism. Physical Review B 94 (2016), p. 140408/1-4
10.1103/PhysRevB.94.140408
Open Access Version (externer Anbieter)
Abstract:
We formulate a pseudofermion functional renormalization group (PFFRG) scheme to address frustrated quantum magnetism in three dimensions. In a scenario where many numerical approaches fail due to sign problem or small system size, three-dimensional (3D) PFFRG allows for a quantitative investigation of the quantum spin problem and its observables. We illustrate 3D PFFRG for the simple cubic J1−J2−J3 quantum Heisenberg antiferromagnet, and benchmark it against other approaches, if available.