Quantum Science Satellite is one of the first five space science missions, slated for launch in the framework of Chinese Academy of Sciences(CAS) Strategic Priority Research Program on space science. The project aims to establish a space platform with long-distance satellite and ground quantum channel, and carry out a series of tests about fundamental quantum principles and protocols in space-based large scale. The satellite will be launched at Jiuquan and on orbit for 2 years. The orbit will be circular and Sun-synchronous with an altitude of 600 km. It crosses the descending node at 00:00 LT. The satellite is under early prototype development currently.
Quantum Science Satellite is one of the first five space science missions, slated for launch in the framework of Chinese Academy of Sciences(CAS) Strategic Priority Research Program on space science. The project aims to establish a space platform with long-distance satellite and ground quantum channel, and carry out a series of tests about fundamental quantum principles and protocols in space-based large scale. The satellite will be launched at Jiuquan and on orbit for 2 years. The orbit will be circular and Sun-synchronous with an altitude of 600 km. It crosses the descending node at 00:00 LT. The satellite is under early prototype development currently.
Quantum Science Satellite is one of the first five space science missions, slated for launch in the framework of Chinese Academy of Sciences (CAS) Strategic Priority Research Program on space science. The project aims to establish a space platform with long-distance satellite and ground quantum channel, and carry out a series of tests about fundamental quantum principles and protocols in space-based large scale. The satellite will be launched at Jiuquan and on orbit for 2 years. The orbit will be circular and Sun-synchronous with an altitude of 600km. It crosses the descending node at 00:00LT. The satellite is under early prototype development currently.
The Micius satellite was successfully launched on 16 August 2016, from Jiuquan, China, orbiting at an altitude of about 500 km. The main scientific goals, including satellite-to-ground quantum key distribution, satellite-based quantum entanglement distribution, ground-to-satellite quantum teleportation, and satellite relayed intercontinental quantum network, were achieved in 2017. As a starting point, the Micius satellite has become a platform for quantum science experiments at the space scale. Here, we introduce the latest experimental achievements (in 2018-2020) based on the Micius satellite.
By using satellites, ultra-long-distance quantum communication and tests of quantum foundations could be achieved at a global scale. The Quantum Experiment Science Satellite (QUESS) in China, also called Micius, one of the scientific satellite programs in the Strategic Priority Program on space science, the Chinese Academy of Sciences, was launched on 16 August 2016. There are totally 4 scientific payloads. We give a brief overview of the quantum experiment science satellite project and present most recent science results. The main scientific goal of the quantum experiment science satellite was achieved in 2017. Here, we introduce the latest achievements in satellite-based quantum communication and large-scale tests of quantum foundations obtained by Micius.
Quantum Experiments at Space Scale (QUESS) mission is one of the scientific space science missions within the framework of the Strategic Pioneer Program on Space Science of the Chinese Academy of Science (CAS), is an international research project in the field of quantum physics.QUESS mission is designed to test and facilitate the quantum encryption and quantum teleportation technology through quantum optics experiment between space and ground.The two main scientific objectives of QUESS are to establish 'hack-proof' quantum communications by transmitting uncrackable keys from space to the ground and provide insights into the strangest phenomenon in quantum physicsquantum entanglement in space scale.In order to achieve the objectives, four experiments will be performed: quantum key distribute, entangled photon transmit, quantum teleportation and high rate coherent laser communication.Built by researchers at the Chinese Academy of Sciences, the quantum science experiment satellite will be the first to test the transfer of quantum information between space and ground.There are four main payloads on-board the satellite: a quantum key transceiver, an entanglement distribution transmitter, a space born entangled-photon source and an experimental control processor.Meanwhile， five telescope stations which are built at Xinglong, Nanshan, Delingha, Lijiang, and Ali, for performing the four experiments with the satellite.QUESS was launched in Aug.16, 2016.China Space Science Mission Center as one of 4 the composition of QUESS ground segments is responsible for the operation of the on-board payloads.The satellite, the ground segment, the basic processes, the mission preparation and the satellite commissioning are described in the paper.
Quantum communication is proven to be the only unconditionally secure method for information exchange, which could well be the first commercial application of quantum information science. Compared with fiber-based demonstrations, free-space links could provide a more promising approach because photon loss and decoherence are almost negligible in the atmosphere. Furthermore, by using satellites, ultra-long-distance quantum communication and tests of quantum foundations could be achieved on a global scale. Here we report a serial of recent experimental progresses on free-space quantum communication over long distance in the Qinghai Lake area. In the meantime, besides the experimental efforts on the ground, Chinese Quantum Science Satellite has been launched on August 16th2016. And we will introduce the latest achievements in satellite-based quantum communication and large-scale tests of quantum foundations obtained through Micius.
Long-distance quantum communication is one of the most important tasks in quantum information science. It contains two main motivations: one is the fundamental interests, and the other is the practical requirements. The physical distance of quantum communication over free-space channel has been extended from several meters in the lab to 1000 km through satellite. In this mini-review, we emphasize the progress made toward the global quantum network, mainly following the world’s first satellite-to-Earth quantum communication in 2017. This includes the development of commercial small-scale quantum satellite constellations and high-orbit satellites capable of all-time coverage, as well as the feasibility of quantum communication network. On this basis, we then discussed the possibility of cross-application of free-space quantum communication technology in fundamental physics, precision measurement, and even astronomical observations. Free-space quantum communication presents both challenges and opportunities, playing a crucial role in the future global quantum network.