A simple analogy is how fast quantum computers are.

You can't simply ask, just as you ask AMD's CPU is the same as Intel's CPU ten years ago, and there is no comparability.

Because the calculation speed of quantum is related to the controllable quantum number n, it is likely to be the power of 2 ∧ n (the n power of 2). But at present, this controllable number is still relatively low, probably less than 20.

And now the electronic computer is very mature. On VLSI, there may be hundreds of millions of components in an area the size of a fingernail. At present, the operation speed of home computers is about 2.5× 10∧9 times per second, and that of supercomputers is 339 million times. Obviously, it is much larger than the 20th power of quantum computer 2 (about 10∧8).

However, supercomputers use CPU superposition and will be composed of tens of thousands of CPUs and GPUs. This is 1+ 1

Moreover, the power consumption is very huge, which is roughly equivalent to the average power consumption of tens of thousands of families in daily life. At the same time, heat dissipation is needed, otherwise it will be damaged.

Quantum computer is not addition, but multiplication. In other words, the operation speed of 20 qubits is not as fast as that of current home computers, and the speed of 30 qubits is about 10∧9 power, 32 qubits can surpass current home computers, and 60 qubits can surpass current supercomputers. But the power consumption is very low.

In other words, electronic and quantum technology paths are like two bosses selling cars.

The electronic watch says, "A car costs 10,000 dollars, a super sports car costs 20,000 dollars, a propeller plane costs 30,000 dollars and a jet plane costs 80,000 dollars."

Quantum said, "Fifty thousand dollars for bicycles, sixty thousand dollars for cars and seventy thousand dollars for rockets."

That is to say, when your technical level is equivalent to 50,000 yuan, you will crush quantum bicycles for electronic propeller planes, but when your technical level reaches 80,000 yuan, you will find that quantum is cheap and not expensive, crushing electrons. According to the current technical level of mankind, electrons are still ahead of quantum, but once quantum breaks through, it takes tens of thousands of years for supercomputers to solve equations or passwords, while quantum computers only need a few minutes.