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- W43549209 abstract "A conceptual difficulty in the foundations of quantum mechanics is the quantum measurement problem (QMP), essentially concerned with the apparent non-unitarity of the measurement process and the classicality of macroscopic systems. In an information theoretic approach proposed by us earlier (Quantum Information Processing 2, 153, 2003), which we clarify and elaborate here, QMP is understood to signal a fundamental finite resolution of quantum states, or, equivalently, a discreteness of Hilbert space. This was motivated by the notion that physical reality is a manifestation of information stored and discrete computations performed at a deeper, sub-physical layer. This model entails that states of sufficiently complex, entangled systems will be unresolvable, or, {em computationally unstable}. Wavefunction collapse is postulated as an error preventive response to such computational instability. In effect, sufficiently complex systems turn classical because of the finiteness of the computational resources available to the physical universe. We show that this model forms a reasonable complement to decoherence for resolving QMP, both in respect of the problem of definite outcomes and of the preferred basis problem. The model suggests that QMP, as a window on the sub-physical universe, serves as a witness to Wheeler's koan ``it from bit''. Some implications for quantum computation and quantum gravity are examined." @default.
- W43549209 created "2016-06-24" @default.
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- W43549209 date "2006-01-10" @default.
- W43549209 modified "2023-09-27" @default.
- W43549209 title "The quantum measurement problem as a witness to It from bit" @default.
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