QSS (QUESS, Mozi)

Launch data:

Spacecraft data:

Description:

• QSS (Quantum Science Satellite) or Mozi, also known as QUESS (Quantum Experiments at Space Scale), is a Chinese minisatellite to establish a space platform with long-distance satellite and ground quantum channel, and to carry out a series of tests about fundamental quantum principles and protocols in space-based large scale.
• The scientific goals are to implement a series of science missions between Quantum Science Satellite and quantum communication ground stations. The major tasks are as follows:
  • Quantum Key Distribution from Satellite to Ground
  • To set up an ultra-long-range quantum channel between ground and satellite with the assistance of high-precision acquisition, tracking and pointing system, implement a quantum key distribution between the satellite and the ground stations, and carry out unconditional secure quantum communication experiments. Global Scale Quantum Communication Network
  • To set up a real wide-area network for quantum communication using the satellite repeater and two arbitrary quantum ground stations and their auxiliary local-area fiber quantum networks. Quantum Entanglement Distribution from Satellite to two ground stations
  • Distribution of quantum entangled photons from the satellite to two distant ground stations whose distance is larger than one thousand kilometers; test of the entanglement properties at a large scale and nonlocality of quantum mechanics. Quantum Teleportation from Ground to Satellite as a totally new way of communication, quantum teleportation is the fundamental process of quantum networks and quantum computing. A high quality quantum entanglement source on the ground will be built to achieve ground-to-satellite teleportation experiments based on photon entanglement.