2020/08/25 by Kyrylo Simonov
Computer Science · Mathematics · Physics and Astronomy · #Classical mechanics #Hamiltonian (control theory) #Hermitian matrix #Mathematics #Physics #Quantum #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum chaos and dynamical systems #Quantum dynamics #Quantum mechanics #Quantum process #Statistical physics #Time evolution #Wave function collapse #hep-ph #quant-ph
paper · pdf · doi:10.1103/physreva.102.022226
published as Phys. Rev. A 102, 022226 (2020) · 15 pages, 1 figure
arxiv created 2020/08/25 · openalex publication_date 2020/08/25 · arxiv updated 2020/08/26 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Spontaneous collapse models aim to resolve the measurement problem in quantum mechanics by considering wave-function collapse as a physical process. We analyze how these models affect a decaying flavor-oscillating system whose evolution is governed by a phenomenological non-Hermitian Hamiltonian. In turn, we apply two popular collapse models, the Quantum Mechanics with Universal Position Localization and the Continuous Spontaneous Localization models, to a neutral meson system. By using the equivalence between the approaches to the time evolution of decaying systems with a non-Hermitian Hamiltonian and a dissipator of the Lindblad form in an enlarged Hilbert space, we show that spontaneous collapse can induce the decay dynamics in both quantum state and master equations. Moreover, we show that the decay property of a flavor-oscillating system is intimately connected to the time (a)symmetry of the noise field underlying the collapse mechanism. This (a)symmetry, in turn, is related to the definition of the stochastic integral and can provide a physical intuition behind the It\ifmmode o\else \=o\fi-Stratonovich dilemma in stochastic calculus.