2065438+At the beginning of 2009, IBM launched a 20-bit quantum computing prototype, which has been sold. At the end of 20 19, Google Quantum Hegemony solved a mathematical problem with only 53-bit dedicated quantum chips.
There are also many advances in patents, including more than 300 Canadian D-Wave patents, 235 from IBM, 2 12 from Microsoft, and 36 from Genquan as the only listed company in China.
From the point of view of quantum computing, there is still a gap of at least four to five years between China and the United States. But the status quo is much better than the classic computer, at least it won't "get stuck".
Principle.
Quantum computer is a computer based on quantum theory. Tracing back to the source, it is the continuous exploration of reversible machines that promotes the development of quantum computers. Quantum computer devices follow the basic theory of quantum computing, process and calculate quantum information, and run quantum algorithms. 198 1 year, Paul Benioff of Aragon national laboratory in the United States first put forward the basic theory of quantum computing.
Quantum bits.
The basic unit of classical computer information is bit, which is a physical system with two states, represented by 0 and 1. In a quantum computer, the basic information unit is a qubit, and two quantum states are used. And │1>; Instead of the traditional bit states 0 and 1. Compared with bits, quantum bits have unique existence characteristics. They exist in the form of superposition of two logical states, that is to say, the two states are the superposition of 0 and 1 corresponding quantum states.