The "multi-node quantum network" studied by China scholars has made a fundamental breakthrough.

The significance of this breakthrough:

The "multi-node quantum network" studied by Chinese scholars has made a fundamental breakthrough, which means that in the field of quantum communication and quantum computing, three separated cold atom quantum memories have been successfully entangled through multi-photon interference, laying the foundation for building a multi-node and long-distance quantum network.

The significance of quantum network:

Quantum network refers to a network in which multiple communication nodes communicate securely by using quantum key distribution. The quantum key generated by each node can encrypt and decrypt traditional communication data such as voice, image and digital multimedia. Because quantum communication lines cannot be eavesdropped and intercepted by hanging bypass, as long as they are eavesdropped, the quantum state will change and the communication content will be detected.

The significance of quantum entanglement:

Quantum entanglement is a strange quantum phenomenon, which means that there is a strong correlation between two or more quantum systems, so that their states are no longer independent, but interdependent. Quantum entanglement provides quantum computers with great computing power and is the basic resource for * * * to enjoy quantum information on the future quantum Internet.

Application of quantum network;

1, quantum simulation

Quantum simulation is to use subsystems to simulate and study the behavior of other physical systems. In the quantum network, by connecting multiple quantum computing nodes and quantum communication channels, it is helpful to construct complex quantum models that simulate physical systems and chemical reactions. Quantum simulation is of great significance to materials science, chemical engineering, drug design and other fields, which is helpful to accelerate scientific research and the development of new materials.

2. Quantum Clock and Time Synchronization

Quantum network can be used to construct high-precision quantum clock and realize time synchronization. Quantum network uses quantum entanglement and quantum measurement technology, which is helpful to realize more accurate time standard and time synchronization, and is applied to satellite navigation, financial transactions and other fields that need high-precision time.

3. Quantum computing

Quantum computing is a field of complex computing by using the parallelism and superposition of quantum bits. In a quantum network, multiple quantum computing nodes can be interconnected to form a distributed computing system. Quantum computing tasks can be assigned to different nodes for parallel execution, which is helpful to improve computing efficiency and the ability to solve complex problems.