A simple introduction to this answer can revolve around a general statement about quantum computers and National Quantum Mission.

A quantum computer seeks to exploit the laws that govern the behaviour of atoms and subatomic particles. In a quantum computer, information is stored in quantum bits, or qubits. And a qubit can be both 0 and 1 at the same time

National Quantum Mission (NQM) will help to scale up scientific and industrial R&D, for accelerating Quantum Technology-led economic growth and leverage India into a leading nation in the area

Body

You may incorporate some of the following points in the body of your answer:

• The NQM focuses on indigenously building quantum-based (physical qubit) computers which are far more powerful and are able to perform the most complex problems in a highly secure manner.
• It will target developing intermediate-scale quantum computers with 50-1000 physical qubits in eight years in various platforms like superconducting and photonic technology.
• Communications: Satellite-based secure quantum communications between ground stations over a range of 2000 kilometres within India, Long-distance secure quantum communications with other countries and inter-city quantum key distribution over 2000 km as well as a multi-node Quantum network with quantum memories are among the other objectives of the mission.
• The mission will help develop magnetometers with high sensitivity in atomic systems and Atomic Clocks for precision timing, communications and navigation.
• It will also aid in the design and synthesis of quantum materials for quantum device production, such as superconductors, innovative semiconductor architectures, and topological materials.
• Four ‘Thematic Hubs‘ (T-Hubs) will be established in premier university and national R&D institutes in the fields of quantum computing, quantum communication, quantum sensing and metrology, and quantum materials and devices. The hubs will focus on the development of new knowledge through basic and applied research, as well as the promotion of R&D.
• Single photon sources/detectors and entangled photon sources will also be developed for quantum communications, sensing and metrological applications