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The question is whether quantum computing necessarily implies that the many worlds interpretation of quantum mechanics is correct. This issue is dealt with in the question How much is quantum computation changing the interpretation of quantum theory, and, if at all, how?How much is quantum computation changing the interpretation of quantum theory, and, if at all, how?, though I suspect the discussion there is too deep for non-physicists.

The simple answer is that no-one knows for sure and different physicists will disagree. However the impression I get as an outsider is that the success of quantum computing does not imply that the many worlds interpretation is correct.

So Tegmark's class 3 multiple universes may or my not exist, but building a working quantum computer will not settle the issue.

The question is whether quantum computing necessarily implies that the many worlds interpretation of quantum mechanics is correct. This issue is dealt with in the question How much is quantum computation changing the interpretation of quantum theory, and, if at all, how?, though I suspect the discussion there is too deep for non-physicists.

The simple answer is that no-one knows for sure and different physicists will disagree. However the impression I get as an outsider is that the success of quantum computing does not imply that the many worlds interpretation is correct.

So Tegmark's class 3 multiple universes may or my not exist, but building a working quantum computer will not settle the issue.

The question is whether quantum computing necessarily implies that the many worlds interpretation of quantum mechanics is correct. This issue is dealt with in the question How much is quantum computation changing the interpretation of quantum theory, and, if at all, how?, though I suspect the discussion there is too deep for non-physicists.

The simple answer is that no-one knows for sure and different physicists will disagree. However the impression I get as an outsider is that the success of quantum computing does not imply that the many worlds interpretation is correct.

So Tegmark's class 3 multiple universes may or my not exist, but building a working quantum computer will not settle the issue.

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John Rennie
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The question is whether quantum computing necessarily implies that the many worlds interpretation of quantum mechanics is correct. This issue is dealt with in the question How much is quantum computation changing the interpretation of quantum theory, and, if at all, how?, though I suspect the discussion there is too deep for non-physicists.

The simple answer is that no-one knows for sure and different physicists will disagree. However the impression I get as an outsider is that the success of quantum computing does not imply that the many worlds interpretation is correct.

So Tegmark's class 3 multiple universes may or my not exist, but building a working quantum computer will not settle the issue.