dorsal/arxiv
View SchemaClassical interventions in quantum systems. I. The measuring process
| Authors | Asher Peres |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9906023 |
| URL | https://arxiv.org/abs/quant-ph/9906023 |
| DOI | 10.1103/PhysRevA.61.022116 |
| Journal | Physical Review A 61 (2000) 022116 |
Abstract
The measuring process is an external intervention in the dynamics of a quantum system. It involves a unitary interaction of that system with a measuring apparatus, a further interaction of both with an unknown environment causing decoherence, and then the deletion of a subsystem. This description of the measuring process is a substantial generalization of current models in quantum measurement theory. In particular, no ancilla is needed. The final result is represented by a completely positive map of the quantum state $\rho$ (possibly with a change of the dimensions of $\rho$). A continuous limit of the above process leads to Lindblad's equation for the quantum dynamical semigroup.
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"abstract": "The measuring process is an external intervention in the dynamics of a\nquantum system. It involves a unitary interaction of that system with a\nmeasuring apparatus, a further interaction of both with an unknown environment\ncausing decoherence, and then the deletion of a subsystem. This description of\nthe measuring process is a substantial generalization of current models in\nquantum measurement theory. In particular, no ancilla is needed. The final\nresult is represented by a completely positive map of the quantum state $\\rho$\n(possibly with a change of the dimensions of $\\rho$). A continuous limit of the\nabove process leads to Lindblad\u0027s equation for the quantum dynamical semigroup.",
"arxiv_id": "quant-ph/9906023",
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"Asher Peres"
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"doi": "10.1103/PhysRevA.61.022116",
"journal_ref": "Physical Review A 61 (2000) 022116",
"title": "Classical interventions in quantum systems. I. The measuring process",
"url": "https://arxiv.org/abs/quant-ph/9906023"
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