Qiskit Nature v0.6 Migration Guide#

This document will guide you through the process of migrating your code from Qiskit Nature v0.5 to v0.6


Version 0.6 of Qiskit Nature comes with two major deprecations:

  1. the (Minimum)EigensolverFactory utilities

  2. the QubitConverter class

Both of these deprecations and explanations on how to update your code are provided in more detail on the following pages:

Other notable deprecations#

Here are a few other noteworthy minor changes which you should be aware of:

  • The symmetry_sector_locator() method is no longer needed in the new workflow around the QubitMapper classes. Instead, you should now use the new get_tapered_mapper() method. For more details, please refer to the QubitConverter migration guide.

  • The new Tensor class has been introduced which will become the default return type of objects stored in a PolynomialTensor instance. You can already switch to this by setting tensor_unwrapping to False.