On Wednesday, the British magazine Nature reported on Wednesday that it made a breakthrough in computer research, creating the first quantum computer capable of surpassing the capabilities of today's most powerful supercomputers. Sycamore." The quantum system took only 200 seconds to complete a calculation, and the same calculations were performed with today's most powerful supercomputer, Summit, which took about 10,000 years. As a result, Google publicly announced the realization of "quantum hegemony" (quantum hegemony refers to the computing power of quantum computing beyond all classical computers).
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Quantum computing favors PoS and destroys PoW?
Some analysts believe that the application of Google's quantum computing technology can help improve the technology of using the Proof of Entitlement (PoS) cryptocurrency.
Quantum computing can create true random numbers
PoS is a blockchain consensus algorithm in which the block creator of the blockchain is randomly selected with a probability proportional to the equity it holds, while the digital currency algorithm based on the workload proof (PoW) uses mining. Mode (such as Bitcoin). However, PoS raises questions about the integrity of random selection.
Scott Aaronson, a quantum theorist at the University of Texas at Austin, told Fortune magazine on October 23 that quantum computing can reduce the suspicions of PoS skeptics because "quantum hegemony" experiments can produce A provable random number. He previously wrote on his personal blog:
“Sampling-based quantum hegemony experiments can be almost immediately re-used to generate bits (under computational assumptions), and these bits can be proven to be random. In turn, this may apply to PoS cryptocurrencies and other encryption protocols. I hope that soon More such applications will be found in the future."
Google Quantum Project challenges the Church-Turing thesis
On October 23, Google released the results of its quantum hegemony experiment, which was peer reviewed by Aaronson. In the experiment, the "Sycamore" quantum computer took 200 seconds to sample 1 million samples of a quantum circuit. In contrast, IBM's supercomputer Summit, which is said to be the most powerful computer to date, will require 10,000 years of computing.
Google pointed out that its experiments were the first experimental challenge for an extended Church-Turing paper (also known as a computability paper) that claimed that traditional computers could effectively perform any "reasonable" computational model. Google explained in a special blog post:
“We first run a random simplification circuit of 12 to 53 qubits to keep the circuit depth constant. We examined the performance of the quantum computer using classical simulation and compared it with the theoretical model. After verifying that the system is running normally, we ran 53 quantum. A random hard circuit with increasing bit depth and depth until the point where classical simulation becomes infeasible. […] In the first quantum calculation that cannot be reasonably simulated on a classical computer, we have opened up a new field of computing. For exploration."
Is Bitcoin affected?
For the latest developments in quantum computing that could jeopardize the security of Bitcoin (BTC), Peter Todd, a former developer of Bitcoin Core, poured a cold water. Todd concluded that bitcoin can be freed from this potential trouble simply by the huge cost of quantum computing. For Google’s so-called “quantum hegemony,” he said on Twitter on October 23rd.
"It doesn't make any sense, because Google's quantum breakthrough is aimed at the primitive type of quantum computing, and this type is far from breaking the level of cryptography. We don't even know if it is possible to extend quantum computers. Adding qubits is very likely Will bring about double the cost increase."
Ethereum founder Vitalik Buterin also commented after Google announced "quantum hegemony." He said that
"So far, my impression of quantum hegemony theory is that it is like hydrogen bombs for nuclear fusion in real quantum computing. This proves that a phenomenon and the ability to gain power from this phenomenon exist. But there is still a long way to go before it can be used directly."
Does Google achieve "quantum hegemony"? Competitor IBM issued a rebuttal
For Google’s claim to “realize quantum hegemony” in Nature, IBM’s one of the biggest rivals in quantum computing, IBM, immediately posted a blog post questioning. IBM bluntly stated , "According to the strictest definition of 'quantum hegemony', this goal has not yet been achieved."
IBM researchers point out that Google's so-called "the most advanced supercomputer takes about 10,000 years" to complete the task, the ideal simulation on a traditional computer system, only 2.5 days, and the fidelity is much higher. This is actually a conservative, worst-case estimate. Google did not fully consider "a lot of disk storage" when comparing.
The blog post also quotes the recent opinion of the "quantum hegemony" proponent, Preskill, that the term "intensifies the excessive hype of the state of quantum technology" and "sends up through the connection with 'white supremacy' A disgusting political position."
IBM believes that the term "hegemony" is being misunderstood by almost everyone, and the "headline party report" like "realizing quantum hegemony" will inevitably mislead the public. According to the strictest definition, this goal has not yet been achieved.
IBM also said in the blog post that quantum computers will never 'overtake' on traditional computers, but work with them because both have their unique advantages.