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Direct measurement of nonlinear properties of bipartite quantum states.

Abstract:

Nonlinear properties of quantum states, such as entropy or entanglement, quantify important physical resources and are frequently used in quantum-information science. They are usually calculated from a full description of a quantum state, even though they depend only on a small number of parameters that specify the state. Here we extract a nonlocal and a nonlinear quantity, namely, the Renyi entropy, from local measurements on two pairs of polarization-entangled photons. We also introduce a "...

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Publication status:
Published

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Journal:
Physical Review Letters More from this journal
Volume:
95
Issue:
24
Pages:
240407
Publication date:
2005-12-01
DOI:
EISSN:
1079-7114
ISSN:
0031-9007
Language:
English
Keywords:
Pubs id:
pubs:154115
UUID:
uuid:8d3fc8eb-d9d6-426b-9f27-871cc198b7ad
Local pid:
pubs:154115
Source identifiers:
154115
Deposit date:
2012-12-19

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