The ALPS project release 1.3: open source software for strongly correlated systems

TL;DR

The ALPS 1.3 release provides open source libraries and programs for simulating strongly correlated quantum lattice models, including new features like DMRG for interacting systems and support for inhomogeneous systems.

Contribution

This release introduces a DMRG program for interacting models and enhanced support for symmetries and inhomogeneous systems in the ALPS software suite.

Findings

Added DMRG for interacting models

Support for translation symmetries in diagonalization

Inclusion of inhomogeneous system capabilities

Abstract

We present release 1.3 of the ALPS (Algorithms and Libraries for Physics Simulations) project, an international open source software project to develop libraries and application programs for the simulation of strongly correlated quantum lattice models such as quantum magnets, lattice bosons, and strongly correlated fermion systems. Development is centered on common XML and binary data formats, on libraries to simplify and speed up code development, and on full-featured simulation programs. The programs enable non-experts to start carrying out numerical simulations by providing basic implementations of the important algorithms for quantum lattice models: classical and quantum Monte Carlo (QMC) using non-local updates, extended ensemble simulations, exact and full diagonalization (ED), as well as the density matrix renormalization group (DMRG). Changes in the new release include a DMRG program for interacting models, support for translation symmetries in the diagonalization programs, the ability to define custom measurement operators, and support for inhomogeneous systems, such as lattice models with traps. The software is available from our web server at http://alps.comp-phys.org/ .