  Post Quantum and Quantum Cryptography schemes are feasible quantum computer
applications for 7G networks. These schemes could possibly replace existing
schemes. These algorithms have been compromised by advances in quantum search
algorithms run on quantum computers like Shor algorithm. Shor algorithm is a
quantum algorithm for finding the prime factors of an integer which is the
basis of existing algorithm. This has become an available quantum computer
application putting the use of ESA algorithm at risk. Our recent paper provides
a detailed survey of the work on post quantum and quantum cryptography
algorithms with focus on their applicability in 7G networks.
  Since the paper focuses on the cryptography algorithms as a follow up, in
this paper, we provide a new framework for quantum network optimization and
survey in detail the work on enabling technologies (quantum hardware) for the
practical implementation of these algorithms including the most important
segments of quantum hardware in 7G. As always in engineering practice practical
solutions are a compromise between the performance and complexity of the
implementation. For this reason, as the main contribution, the paper presents a
network and computer applications optimization framework that includes
implementation imperfections. The tools should be useful in optimizing future
generation practical computer system design. After that a comprehensive survey
of the existing work on quantum hardware is presented pointing out the sources
of these imperfections. This enables us to make a fair assessment of how much
investment into quantum hardware improvements contributes to the performance
enhancement of the overall system. In this way a decision can be made on proper
partitioning between the investment in hardware and system level complexity.
