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I am new to the quantum world and it's computing. But it accidentally hit in my mind that DWave built a quantum computer with 2000 qubits which can be use to simulate the whole observable universe or to simulate whole brain for finding what out about consciousness. And the future plan of Dwave is to build a quantum computer with 5000 qubits, which is a lot higher.

Recently Google made a quantum computer and claims to have achieved quantum supremacy.

But what is the problem with running the experiment, which can solve the centuries-old problem using quantum computer with 2000 qubits?

Any help would be appreciated.

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  • $\begingroup$ Hey Anish - Could you clarify your question? Something to note is that DWave's chip is of a significantly different type than Google's, meaning that the qubit counts cannot be compared directly. Are you wondering whether a DWave device could demonstrate quantum supremacy? $\endgroup$ – C. Kang Nov 14 at 16:27
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    $\begingroup$ "built a quantum computer with 2000 Qubit which can be use to simulate the whole observable universe or to simulate whole brain for finding what the consciousness . And the future plan of Dwave is to build a quantum computer with 5000 qubits which is a lot of bit" it is not a computer in the sense that it can perform arbitrary computations, and no, it cannot "simulate the whole observable universe" etc. Where did you read that? Also, can you clarify the question? Are you asking whether D-Wave can be used for q supremacy experiments, or something else? $\endgroup$ – glS Nov 14 at 18:12
  • $\begingroup$ Hi Anish, welcome to QCSE. I have made some edits of your question for clarity and readability; I hope I did not deviate from the spirit of your question. But I agree with @C.Kang and gIS that the question is kind of unclear now. Can you further edit your question for clarity? $\endgroup$ – Mark S Nov 14 at 18:26
  • $\begingroup$ Personally, I think statements like a "to simulate the whole observable universe" or "to simulate whole brain for finding what out about consciousness" are simply a marketing. As mentioned above, could you please post a link to articles on those? $\endgroup$ – Martin Vesely Nov 14 at 21:05
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D-Wave's 2000Q is a quantum annealer, not a circuit-based quantum computer like Google's Sycamore. The qubits in D-Wave's system are much noisier, less controlled and perform a fundamentally different type of computation compared to Google and IBM's circuit-based quantum computers.

D-Wave's current system cannot simulate the observable universe or the human brain. What led you to believe this? Despite the large number of qubits, noise and lack of control prevent their present system from any hope of demonstrating quantum supremacy.

According to John Preskill (here)

...as of now we don't have a convincing theoretical argument or persuasive experimental evidence indicating that quantum annealers can really speed up the time to solution compared to the best classical hardware running the best algorithms for the same problems.

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