Chapter 363: Verification of Quantum Computers
Shen Qi gave Director Wu's team four days of rest, and also gave himself some buffer time.
The section of "Hodge Conjecture Topology Method" is the beginning of Shen Qi's beginning, Director Wu hit it off at the beginning, and our center follows Professor Shen to do great things!
The most creative of the three sections is the algebraic geometry section that Shen Qi mainly grasps, and the most complex is the topology section that Director Wu is responsible for.
It was already very complicated, but now that Director Wu is studying it, it is getting more complicated, and Shen Qi can't give an answer on the spot, so it is recommended to take a four-day holiday.
In the past four days, Shen Qi and Academician Pan met secretly to answer Academician Pan's confusion.
This building is equipped with cameras everywhere, 24 hours without blind spots, and belongs to the most confidential scientific research institution.
Therefore, through these generation functions, the prime number carrier is imported, and the quantum chaotic system is connected, and the fundamental properties of the Riemann theorem ensure the absolute security of the quantum key...... Theoretically, it seems to be flawless, but Professor Shen, your esoteric theory and self-created equations, our QPU has been calculated for two months without any results!"
Q stands for Quantum, and QPU is a quantum processor, the most core hardware in a quantum computer.
"Is there a deviation in the experimental process?" Shen Qi frowned, he had explained very clearly about the theory, the problem was that Academician Pan's quantum computer did not buy it.
Theories that cannot be experimentally proven cannot be applied on a large scale.
Academician Pan was very anxious, he knew that he was not the only top team in the world to study this field, at least the Courant Institute in the United States was also doing similar things.
"Follow me. Academician Pan grabbed Shen Qi's hand and forcibly pulled Shen Qi to follow him.
"Where are you going?" asked Shen Qi.
"Laboratory. Academician Pan pulled Shen Qi around the corner and came to a metal door.
Academician Pan took off his glasses and brushed his pupils, the metal door slipped open, and Shen Qi finally saw and entered the legendary Chinese quantum computer laboratory.
The staff brought two clean white coats, and Academician Pan and Shen Qi put them on, which were the battle suits of scientific researchers, and they fought for the country on another front.
Shen Qi originally thought that the disk-sized quantum computer, which had repeatedly set world records and had 18 qubits entangled, was a cool machine with science fiction colors.
This quantum computer is right in front of Shen Qi's eyes, it's cool, it's just a bit messy.
The shell of China's quantum computer system independently developed by Academician Pan's team is more than 4 meters high and more than three meters wide.
The hardware included a complex cryogenic refrigeration system, a protective cover, an I/O system, and cables as thick as two fingers crisscrossed the laboratory, and Shen Qi almost tripped over the cables.
Most of the cables are connected to the refrigeration system, and the liquid nitrogen in the closed-loop refrigerator maintains a low temperature of minus 273.135 degrees Celsius for 24 hours.
With so much complex hardware to support a QPU the size of a small thumb cap, the fragile and sensitive quantum processor consisting of several niobium miniature ring lattices can only operate at temperatures near absolute zero to shield against magnetic fields and isolate external factors such as vibrations.
The implementation of quantum cryptography depends on quantum fundamental physics, which means that quantum cryptography can only be used in application scenarios based on quantum physics.
After years of hard work by scientists, quantum computers have evolved from concepts to physical objects.
There are not many countries that have a quantum computer in the true sense, the United States, China, Japan, Germany, Canada, just a few countries, Canada's GDP ranks tenth in the world, and the other four countries are the top four in the world.
"I'm a mess. Academician Pan said embarrassedly.
"Indeed, much more messy than my office in Princeton. Shen Qi smiled and added: "But you can take out a small part here at a price, and the price can buy all the experimental equipment in my office." ”
"Let's get down to business, Shen Qi. Academician Pan and the staff checked the software and hardware of the quantum computer together, and after confirming that it was correct, the experiment began.
With a lot of data swiped on the main screen, they are constantly tumbling, and quantum mechanics believes that microscopic objects can be in a "paradoxical" state, that is, an atom can be in two states at the same time.
Unlike traditional computers, which use bits of 0 or 1 to store information, qubits store information that can be 0, 1, or both 0 and 1.
Quantum keys begin to be distributed according to a certain pattern, and this process relies on the transmission of qubits.
Optical quanta are continuously generated, and they follow the Heisenberg uncertainty principle under the scheduling of QPU, and when making measurements, the accurate measurement of one group of quantities will inevitably lead to the complete uncertainty of the other set of quantities.
"Alice is fine!"
"Bob, everything is fine!"
The staff operated the machine while closely monitoring the data changes, and they repeatedly shouted the names of two people, Alice and Bob.
You can understand that Alice is a little Lori, Bob is her little friend, and the two virtual characters only exist in quantum communication experiments.
In a virtual paradise of 8,192 qubits and 15,000 couplers, Alice and Bob play a quantum game:
Alice generates a random qubit string based on the four polarization directions of linearly polarized and circularly polarized photons.
Alice sends the qubit string S to Bob over the quantum transmission channel.
Bob randomly selected linearly polarized photons and circularly polarized photons as the basis sequences to measure the photons he received.
Bob informs Alice of his chosen base sequence via the classical channel.
Alice and Bob encode quantum states into binary bits.
......
Up to this point, Alice and Bob have been playing interquantum games under the BB84 protocol.
QPU travels through time and space at an easy pace, and it easily leads Alice and Bob to the 90s, and under the EPR agreement, Alice and Bob continue to play happily.
Staff: "No problem with Alice!"
Staff: "No problem Bob!"
If Academician Pan travels to the 90s with his quantum computer, he is almost invincible.
However, this is the 21st century, and the old ways are outdated.
QPU dragged Alice and Bob into the 21st century.
In the 21st century, Academician Pan does not believe in the theories created by any foreign team, he only believes in his own team.
But the problem is that Academician Pan's team can't come up with a theoretically perfect new plan, they are not theorists, they are a group of top applied scientists.
Therefore, Academician Pan invited Shen Qi, a master of Chinese basic theory, to help him solve the problem.
In the 21st century, the quantum cryptography world is divided, and this is a battlefield without gunpowder.
Shen Qi, who is deeply trusted by Academician Pan, has given a theoretical solution that has been entered into a quantum computer system.
Shen Qi's brain-burning new differential expression of the Hermitt polynomial, which he has been inventing for several months, is grandly unveiled.
Based on the regular product form of the operator Hermitt polynomial, tens of thousands of new generating functions are generated instantaneously.
No one had ever seen these tens of thousands of new generation functions before, including Shen Qi.
Shen Qi's eyes stared at the screen, and what he gave was a theoretical principle, and the quantum computer calculated all the possibilities on his theoretical basis.
The QPU is getting slower and slower, and Alice and Bob are getting old, and they can no longer be as lively as they were when they were children.
"Alice strikes!"
"Bob strikes!"
"The QPU is not very stable, Academician Pan!"
The staff shouted.
"Turn on the backup liquid nitrogen refrigeration system!" Academician Pan immediately commanded.
The backup liquid nitrogen refrigeration system was put into use, and under the escort of the dual refrigeration system, the fragile and sensitive QPU finally returned to normal.
All the machines in the laboratory are running at full capacity, and the laboratory, which accounts for 3% of the entire scientific research building, consumes more than 90% of the electricity consumption of the whole building.
"Every time Alice and Bob get into this segment, there are always problems. Academician Pan said to Shen Qi.
"It's a lot of computation, and the point is that Alice and Bob seem a little uncomfortable with my logic. Shen Qi frowned in thought, he wanted to help Alice and Bob take a crucial step.
Academician Pan said helplessly: "It seems that it is difficult for the computer to surpass the human brain in the short term, at least my QPU is difficult to control Shen Qi's theory, it is about to be broken by you." ”