Quantum relative states
نویسندگان
چکیده
منابع مشابه
Relative states, quantum axes and quantum references
We address the problem of measuring the relative angle between two ‘quantum axes’ made out of N1 and N2 spins. Closed forms of our fidelity-like figure of merit are obtained for an arbitrary number of parallel spins. The asymptotic regimes of large N1 and/or N2 are discussed in detail. The extension of the concept ‘quantum axis’ to more general situations is addressed. We give optimal strategie...
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ژورنال
عنوان ژورنال: The European Physical Journal D
سال: 2006
ISSN: 1434-6060,1434-6079
DOI: 10.1140/epjd/e2006-00097-y