China developed the world's first quantum computer. What is a quantum computer?

Problem 1: It won't happen in the foreseeable future, which means we can't predict when it will happen. Although the concept of quantum computer has been put forward, there is no specific realization theory. At present, no scientist in the world knows how to make a quantum computer. Basically, at the current level of science and technology, quantum computers are not much different from science fiction.

Question 2: A quantum computer can let all the people in the world play the best games without pressure at the same time, and also get the world weather forecast by the way.

Question 3: Today's computer is binary, because the storage unit represents data by voltage, and the voltage has only two states: high and low. Quantum, on the other hand, has an almost infinite state, so a storage unit can store almost infinite data, and after processing the data of a unit, the calculation of almost infinite code is completed (theoretically, the state of quantum is infinite, but limited by the space size and measurement resolution, we can't use infinite state, but compared with electronic computers, it is almost infinite).

By the way, don't think that a quantum computer will be born just because China has launched a quantum experimental satellite. China, a quantum experimental satellite, experiments with quantum communication, which is completely different from the quantum computer you mentioned.