Quantum Indeterminism and First Passage Random Walks in Hilbert Space

Details Quantum Indeterminism and First Passage Random Walks in Hilbert Space Quantum Indeterminism and First Passage Random Walks in Hilbert Space

2005-02-18

arxiv.org/abs/quant-ph/0502111v4

Physics

Quantum Physics

model extended and partly rewritten for clarity and rigour

Scientific paper

We propose a new model for a measurement of a characteristic of a microscopic quantum state by a large system that selects stochastically the different eigenstates with appropriate quantum weights. Unlike previous works which formulate a modified Schr\"odinger equation or an explicit modified Hamiltonian, or more complicated mechanisms for reduction and decoherence to introduce transition to classical stochasticity, we propose the novel use of couplings to the environment, and random walks in the product Hilbert space of the combined system, with first passage stopping rules, which seem intuitively simple, as quantum weights and related stochasticity is a commonality that must be preserved under the widest range of applications, independent of the measured quantity and the specific properties of the measuring device.

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