dorsal/arxiv
View SchemaPropagation of local decohering action in distributed quantum systems
| Authors | M. I. Katsnelson, V. V. Dobrovitski, B. N. Harmon |
|---|---|
| Categories | |
| ArXiv ID | quant-ph/9909028 |
| URL | https://arxiv.org/abs/quant-ph/9909028 |
| DOI | 10.1103/PhysRevA.62.022118 |
| Journal | Phys. Rev. A 62, 022118 (July 2000) |
Abstract
We study propagation of the decohering influence caused by a local measurement performed on a distributed quantum system. As an example, the gas of bosons forming a Bose-Einstein condensate is considered. We demonstrate that the local decohering perturbation exerted on the measured region propagates over the system in the form of a decoherence wave, whose dynamics is governed by elementary excitations of the system. We argue that the post-measurement evolution of the system (determined by elementary excitations) is of importance for transfer of decoherence, while the initial collapse of the wave function has negligible impact on the regions which are not directly affected by the measurement.
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"abstract": "We study propagation of the decohering influence caused by a local\nmeasurement performed on a distributed quantum system. As an example, the gas\nof bosons forming a Bose-Einstein condensate is considered. We demonstrate that\nthe local decohering perturbation exerted on the measured region propagates\nover the system in the form of a decoherence wave, whose dynamics is governed\nby elementary excitations of the system. We argue that the post-measurement\nevolution of the system (determined by elementary excitations) is of importance\nfor transfer of decoherence, while the initial collapse of the wave function\nhas negligible impact on the regions which are not directly affected by the\nmeasurement.",
"arxiv_id": "quant-ph/9909028",
"authors": [
"M. I. Katsnelson",
"V. V. Dobrovitski",
"B. N. Harmon"
],
"categories": [
"quant-ph"
],
"doi": "10.1103/PhysRevA.62.022118",
"journal_ref": "Phys. Rev. A 62, 022118 (July 2000)",
"title": "Propagation of local decohering action in distributed quantum systems",
"url": "https://arxiv.org/abs/quant-ph/9909028"
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