Our quantum-cryptography tag currently reads:
Quantum cryptography describes the use of quantum mechanical effects to perform cryptographic tasks or to break cryptographic systems. In particular quantum cryptography handles the aspects of quantum communication and quantum computation.
What about splitting it into its two branches:
- quantum-computing, about use of quantum computers (making direct use of quantum mechanical effects to achieve operation), in particular for cryptanalysis.
- quantum-communication (or perhaps the existing quantum-cryptography), about the use of quantum mechanical effects to securely transfer information without depending on the unproven hardness of mathematical problems (including, quantum key distribution).
That would leave the post-quantum-cryptography tag as is, for cryptography that resists quantum-computing.