dorsal/arxiv
View SchemaQuantum Measurement, a coherent description
| Authors | Bas Janssens |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/0503009 |
| URL | https://arxiv.org/abs/quant-ph/0503009 |
Abstract
It is widely known that `collapse of the wave function' on a quantum system A may be brought about by an interaction with another quantum system B. We will prove that this is not just a possible, but a necessary consequence of information transfer from A to B. We generalize this in order to explain why coherences are normally not observed in macroscopic quantum systems. Finally, we provide a quantitative insight into the balance between information gain and state disturbance. We define the quality of an information transfer. For all information transfers of a certain quality, we find a minimum amount of state collapse. Along the way, we obtain generalizations of the Joint Measurement Theorem and of the Heisenberg Principle.
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"abstract": "It is widely known that `collapse of the wave function\u0027 on a quantum system A\nmay be brought about by an interaction with another quantum system B. We will\nprove that this is not just a possible, but a necessary consequence of\ninformation transfer from A to B. We generalize this in order to explain why\ncoherences are normally not observed in macroscopic quantum systems. Finally,\nwe provide a quantitative insight into the balance between information gain and\nstate disturbance. We define the quality of an information transfer. For all\ninformation transfers of a certain quality, we find a minimum amount of state\ncollapse. Along the way, we obtain generalizations of the Joint Measurement\nTheorem and of the Heisenberg Principle.",
"arxiv_id": "quant-ph/0503009",
"authors": [
"Bas Janssens"
],
"categories": [
"quant-ph"
],
"title": "Quantum Measurement, a coherent description",
"url": "https://arxiv.org/abs/quant-ph/0503009"
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