Universal structure of objective states in all fundamental causal theories
arXiv:1805.12126 · doi:10.1103/PhysRevResearch.3.033148
Abstract
A crucial question is how objective and classical behavior arises from a fundamental physical theory. Here we provide a natural definition of a decoherence process valid in all causal theories, and show how its behavior can be extremely different from the quantum one. Remarkably, despite this, we prove that the so-called spectrum broadcast structure characterizes all objective states in every fundamental causal theory, exactly as in quantum mechanics. Our results show a stark contrast between the extraordinarily diverse decoherence behavior and the universal features of objectivity.
5+20 pages, 4+9 figures, close to published version
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- Pseudo standard entanglement structure cannot be distinguished from standard entanglement structure
- Bell Nonlocality in Classical Systems Coexisting with other System Types
- Quantum Darwinism and the spreading of classical information in non-classical theories
- Randomness-free Detection of Non-projective Measurements: Qubits & beyond