That's the same breakthrough like that one from 20 years ago ? On Thursday, 12 December 2024 at 18:17:26 UTC+2 PGC wrote:
> From Neven's blog, who thinks Quantum Computing supports MWI indirectly: > https://blog.google/technology/research/google-willow-quantum-chip/ > > The key argument linking Google's results to MWI is this: Quantum error > correction assumes the universal applicability of unitary evolution, the > cornerstone of quantum mechanics under MWI.The increasing fidelity of error > correction as systems scale, suggests that quantum effects persist > robustly, even in larger, more complex systems. This bolsters the > plausibility that the universe operates as a fully quantum system without > invoking wavefunction collapse. If the multiverse exists as described by > MWI, then the success of large-scale quantum computing is a natural > consequence, as each computation's branching outcomes correspond to the > different branches of the multiverse. > > The argument is indirect and circumstantial but noteworthy. While it does > not "prove" MWI, it aligns with MWI's predictions, making the > interpretation not as implausible as many make it out to be. > > In collapse interpretations, decoherence explains why superpositions > appear to "choose" classical outcomes. Quantum error correction could still > function as long as the system avoids collapse during computation and > decoherence is managed. The coherence between qubits would then represent > potential states rather than actual branches. Probabilistic Framework > Collapse interpretations could argue that error correction succeeds because > the physical system probabilistically maintains coherence during > operations. Measurement is avoided until after computation, so the qubits > remain in their superposed states (potentially explained as amplitudes of > possibility rather than branches of reality). > > Copenhagen might require ad hoc explanations to justify why quantum error > correction apparently aligns with the formalism of the wavefunction, even > when interpreted as merely a tool for probabilistic prediction rather than > a real, branching entity. Error correction often operates automatically, > with no human observer collapsing the system. Collapse interpretations > would have to clarify how coherence is maintained and errors are corrected > without invoking an observer. > > It appears more straightforward with MWI (Warning: I am not MWI > proponent/advocate): The redundancy encoded in error correction exists > across all branches, with amplitudes adjusted to represent error-free > computations. No "collapse" mechanism is required; the wavefunction evolves > deterministically according to Schrödinger's equation. The observed > outcomes (error-free computations) are a result of constructive > interference within the multiverse. As quantum computers like Google's > Willow chip demonstrate increasing coherence and error correction efficacy, > they indirectly support interpretations like MWI that treat the > wavefunction as real and universal. This support comes not as > convincing/direct proof of MWI but through Occam: MWI requires fewer > additional assumptions than collapse theories to account for the observed > success of quantum error correction. > > On Tuesday, December 10, 2024 at 2:52:45 PM UTC+1 John Clark wrote: > >> Explore this gift article from The New York Times. You can read it for >> free without a subscription. >> >> Quantum Computing Inches Closer to Reality After Another Google >> Breakthrough >> >> Google unveiled an experimental machine capable of tasks that a >> traditional supercomputer could not master in 10 septillion years. (That’s >> older than the universe.) >> >> >> https://www.nytimes.com/2024/12/09/technology/google-quantum-computing.html?unlocked_article_code=1.gU4.HQ6B.CrWBbQsS0o0t&smid=em-share >> > -- You received this message because you are subscribed to the Google Groups "Everything List" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/d/msgid/everything-list/eb069e09-3b1d-4c99-ac42-571b3058c923n%40googlegroups.com.
