What is quantum technology and what is subversion of traditional quantum technology?

Quantum theory is one of the two cornerstones of modern physics.

Quantum theory provides us with a new way to express and think about nature. Quantum theory reveals the basic laws of the microscopic material world and lays a theoretical foundation for atomic physics, solid state physics, nuclear physics and particle physics. It can well explain the atomic structure, the regularity of atomic spectrum, the properties of chemical elements, the absorption and radiation of light and so on. 1928, Dirac applied the theory of relativity to quantum mechanics, and after the development of Heisenberg and Pauli, quantum electrodynamics was formed. Quantum electrodynamics studies the interaction between electromagnetic field and charged particles. 1947, Lamb displacement was discovered by experiment. 1948- 1949, richard phillips feynman, J.S. Schwinge and Asanaga Ichiro developed quantum electrodynamics with the concept of renormalization, thus winning the 1965 Nobel Prize in Physics.