Welcome to Renormalizer’s documentation!

Renormalizer is a quantum dynamics package based on density matrix renormalization group (DMRG) and its time dependent formulation written in Python. All (TD-)DMRG algorithms are implemented within the framework of matrix product states (MPS) and matrix product operators (MPO). The package aims to provide a powerful and efficient platform for quantum dynamics simulation and method development with (TD-)DMRG. The package is still under heavy development. Please refer to our recent papers for the new developments.

Contents

• 1. An overview of Renormalizer
  • 1.1. How to cite
  • 1.2. Features
• 2. Installation guide
  • 2.1. Quick installation
  • 2.2. Install from scratch
  • 2.3. GPU-support
• 3. Tutorial
  • 3.1. Spin-1/2 1-D Heisenberg model
  • 3.2. Define Your Model
  • 3.3. Time Evolution Algorithms
• 4. Model
  • 4.1. The Model classes
  • 4.2. Basis Functions
  • 4.3. The Operator Class
• 5. Low Level Data Structure and Algorithms
  • 5.1. Matrix Product (MP)
  • 5.2. Matrix Product State (MPS)
  • 5.3. Matrix Product Operator (MPO)
  • 5.4. Matrix Product Density Matrix (MPDM)
  • 5.5. Thermal Propagation
• 6. Static Eigenstate Method
  • 6.1. Ground state and state-averaged method
  • 6.2. Tamm-Dancoff approximation for excited state
• 7. spectra: absorption/emission spectrum at zero/finite temperature
  • 7.1. Zero temperature — TD-DMRG
• 8. Charge Transport
  • 8.1. Obtain Mobility by Green-Kubo Formula
  • 8.2. Charge Diffusion Dynamics Simulation
  • 8.3. One-Particle Spectral Function
• 9. Frequency domain DMRG
  • 9.1. cv — correction vector
• 10. Calculation Configurations
  • BondDimDistri
  • CompressConfig
  • CompressCriteria
  • EvolveConfig
  • EvolveMethod
  • OFS
  • OptimizeConfig
  • parse_memory_limit()
• 11. lib
• 12. Spin-Boson Model
  • SpinBosonDynamics
• 13. Frequently Asked Questions
  • 13.1. How to build docs and view them locally?
• 14. How to develop Renormalizer
  • 14.1. Development Process
  • 14.2. Stylistic Guidelines
  • 14.3. Common Mistakes during Development