alt Hacker News> It lends credence to the notion that quantum computation occurs in many parallel universes, in line with the idea that we live in a multiverse, a prediction first made by David Deutsch.
Processing in multiverse. Would that mean we are inyecting entropy into those other verses? Could we calculate how many are there from the time it takes to do a given calculation? We need to cool the quantum chip in our universe, how are the (n-1)verses cooling on their end?
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AFAIK a fundamental step in any quantum computing algorithm is bringing the qubits back to a state with a nonrandom outcome (specifically, the answer to the problem being solved). Thus a "good" quantum computer does not bifurcate the wavefunction at a macro level, ie there is no splitting of the "multiverse" after the calculation.
Isn't it really just processing with matrices of imaginary numbers? Which is why you need error correction in the first place because the higher temperature the system the less coherent the phases all become? Thus having absolutely nothing to do with multiverse theory?
I think string theories ideas about extra curled up dimensions are far more likely places to look. You've already got an infinite instantaneous energy problem with multiverses let alone entropy transfer considerations.
The many-worlds interpretation of quantum theory [1] is widely considered unfalsifiable and therefore mostly pseudoscientific. This article is way in over it's head in claiming such nonsense.
[1] https://en.wikipedia.org/wiki/Many-worlds_interpretation
What if we are? And by injecting entropy into it, we are actually hurrying (in small insignificant ways) the heat death of those universes? What if we keep going and scale out and in the future it causes a meaningful impact to that universe in a way that it's residents would be extremely unhappy with, and would want to take revenge?
What if it's already happening to our universe? And that is what black holes are? Or other cosmology concepts we don't understand?
Maybe a great filter is your inability to protect your universe from quantum technology from elsewhere in the multiverse ripping yours up?
Maybe the future of sentience isn't fighting for resources on a finite planet, or consuming the energy of stars, but fighting against other multiverses.
Maybe The Dark Forest Defence is a decision to isolate your universe from the multiverse - destroying it's ability to participate in quantum computation, but also extending it's lifespan.
(I don't believe ANY of this, but I'm just noting the fascinating science fiction storylines available)