In terms of quantum theory, the behaviour of a quantum computer is not fundamentally any different to the behaviour of any small scale particle or collection of particles.
Even buckyballs have been shown to self-interfere in a double-slit experiment, and that doesn't _prove_ multi-worlds over the Copenhagen interpretation.
There might be other philosophical reasons to believe in many-worlds, and I am partial to it myself, but experimental observation of this form would not to my understanding contribute to that argument.
Probably they would just explain it with the normal Copenhagen interpretation?
https://en.wikipedia.org/wiki/Copenhagen_interpretation
In terms of quantum theory, the behaviour of a quantum computer is not fundamentally any different to the behaviour of any small scale particle or collection of particles.
Even buckyballs have been shown to self-interfere in a double-slit experiment, and that doesn't _prove_ multi-worlds over the Copenhagen interpretation.
https://web.archive.org/web/20120331115055/http://www.quantu...
There might be other philosophical reasons to believe in many-worlds, and I am partial to it myself, but experimental observation of this form would not to my understanding contribute to that argument.