Dynamical model for positive-operator-valued measures
| Autor: | A. De Pasquale, Paola Verrucchi, Alessandro Cuccoli, Caterina Foti, Vittorio Giovannetti |
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| Rok vydání: | 2019 |
| Předmět: |
Physics
Quantum Physics Quantum object FOS: Physical sciences Quantum measurement Propagator 01 natural sciences Unitary state 010305 fluids & plasmas symbols.namesake Operator (computer programming) 0103 physical sciences symbols Applied mathematics Quantum Physics (quant-ph) 010306 general physics Hamiltonian (quantum mechanics) Von Neumann architecture |
| Zdroj: | Physical review. A (Online) 100 (2019). doi:10.1103/PhysRevA.100.012130 info:cnr-pdr/source/autori:De Pasquale, A.; Foti, C.; Cuccoli, A.; Giovannetti, V; Verrucchi, P./titolo:Dynamical model for positive-operator-valued measures/doi:10.1103%2FPhysRevA.100.012130/rivista:Physical review. A (Online)/anno:2019/pagina_da:/pagina_a:/intervallo_pagine:/volume:100 |
| ISSN: | 2469-9934 2469-9926 |
| Popis: | We tackle the dynamical description of the quantum measurement process, by explicitly addressing the interaction between the system under investigation with the measurement apparatus, the latter ultimately considered as macroscopic quantum object. We consider arbitrary Positive Operator Valued Measures (POVMs), such that the orthogonality constraint on the measurement operators is relaxed. We show that, likewise the well-known von-Neumann scheme for projective measurements, it is possible to build up a dynamical model holding a unitary propagator characterized by a single time-independent Hamiltonian. This is achieved by modifying the standard model so as to compensate for the possible lack of orthogonality among the measurement operators of arbitrary POVMs. 9 pages, 5 figures |
| Databáze: | OpenAIRE |
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