Quantum features of natural cellular automata

Emergent Quantum Mechanics 2015

Elze, Hans-Thomas^1

Dipartimento di Fisica Enrico Fermi, Università di Pisa, Largo Pontecorvo 3, Pisa

I-56127, Italy^1

关键词: Conservation law;    Deterministic automata;    Quantum effects;    Quantum features;    Quantum mechanical model;    Sampling theory;    Superposition principle;    Tensor product structures;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/701/1/012017/pdf
DOI  :  10.1088/1742-6596/701/1/012017

来源: IOP

【 摘 要 】

Cellular automata can show well known features of quantum mechanics, such as a linear rule according to which they evolve and which resembles a discretized version of the Schrödinger equation. This includes corresponding conservation laws. The class of "natural" Hamiltonian cellular automata is based exclusively on integer-valued variables and couplings and their dynamics derives from an Action Principle. They can be mapped reversibly to continuum models by applying Sampling Theory. Thus, "deformed" quantum mechanical models with a finite discreteness scale l are obtained, which for l → 0 reproduce familiar continuum results. We have recently demonstrated that such automata can form "multipartite" systems consistently with the tensor product structures of nonrelativistic many-body quantum mechanics, while interacting and maintaining the linear evolution. Consequently, the Superposition Principle fully applies for such primitive discrete deterministic automata and their composites and can produce the essential quantum effects of interference and entanglement.