{ "id": "quant-ph/0006048", "version": "v1", "published": "2000-06-09T13:40:04.000Z", "updated": "2000-06-09T13:40:04.000Z", "title": "Recycling of quantum information: Multiple observations of quantum clocks", "authors": [ "Vladimir Buzek", "Peter L. Knight", "Nobuyuki Imoto" ], "comment": "4 pages", "categories": [ "quant-ph" ], "abstract": "How much information about the original state preparation can be extracted from a quantum system which already has been measured? That is, how many independent (non-communicating) observers can measure the quantum system sequentially and give a nontrivial estimation of the original unknown state? We investigate these questions and we show from a simple example that quantum information is not entirely lost as a result of the measurement-induced collapse of the quantum state, and that an infinite number of independent observers who have no prior knowledge about the initial state can gain a partial information about the original preparation of the quantum system.", "revisions": [ { "version": "v1", "updated": "2000-06-09T13:40:04.000Z" } ], "analyses": { "keywords": [ "quantum information", "quantum clocks", "multiple observations", "quantum system", "original state preparation" ], "note": { "typesetting": "TeX", "pages": 4, "language": "en", "license": "arXiv", "status": "editable", "adsabs": "2000quant.ph..6048B" } } }