QuSpin: a Python Package for Dynamics and Exact Diagonalisation of Quantum Many Body Systems part I: spin chains

By Phillip Weinberg, Marin Bukov. 2016

380 citations recorded by the source corpus.

We present a new open-source Python package for exact diagonalization and quantum dynamics of spin(-photon) chains, called QuSpin, supporting the use of various symmetries in 1-dimension and (imaginary) time evolution for chains up to 32 sites in length. The package is well-suited to study, among others, quantum quenches at finite and infinite times, the Eigenstate Thermalisation hypothesis, many-body localisation and other dynamical phase transitions, periodically-driven (Floquet) systems, adiabatic and counter-diabatic ramps, and spin-photon interactions. Moreover, QuSpin's user-friendly interface can easily be used in combination with other Python packages which makes it amenable to a high-level customisation. We explain how to use QuSpin using four detailed examples: (i) Standard exact diagonalisation of XXZ chain (ii) adiabatic ramping of parameters in the many-body localised XXZ model, (iii) heating in the periodically-driven transverse-field Ising model in a parallel field, and (iv) quantised light-atom interactions: recovering the periodically-driven atom in the semi-classical limit of a static Hamiltonian.

Subfields: Atomic and Molecular Physics, and Optics, Condensed Matter Physics

View Paper: https://www.semanticscholar.org/paper/71f0412d3911ba81cf88b29f2f9e065cd994aac1

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In Atomic and Molecular Physics, and Optics

  1. R. Shir
  2. A. Sánchez-Garrido
  3. E. Rabinovici
  4. J. Sonner
  5. Pankaj Mehta
  6. Dries Sels
  7. A. Polkovnikov
  8. Phillip Weinberg

In Condensed Matter Physics

  1. R. Shir
  2. A. Sánchez-Garrido
  3. E. Rabinovici
  4. J. Sonner
  5. Marin Bukov
  6. A. Polkovnikov
  7. Phillip Weinberg

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