http://www.cnr.it/ontology/cnr/individuo/prodotto/ID58446
Homodyne estimation of quantum state purity by exploiting the covariant uncertainty relation (Articolo in rivista)
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- Label
- Homodyne estimation of quantum state purity by exploiting the covariant uncertainty relation (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1088/0031-8949/83/04/045001 (literal)
- Alternative label
Man'ko, VI; Marmo, G; Porzio, A; Solimeno, S; Ventriglia, F (2011)
Homodyne estimation of quantum state purity by exploiting the covariant uncertainty relation
in Physica scripta (Print); IOP Publishing Ltd. (Institute of Physics Publishing Ltd), "Bristol ; London" (Regno Unito)
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Man'ko, VI; Marmo, G; Porzio, A; Solimeno, S; Ventriglia, F (literal)
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- http://iopscience.iop.org/1402-4896/83/4/045001/ (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- 1. PN Lebedev Phys Inst, Moscow 119991, Russia
2. Univ Naples Federico 2, Dipartimento Sci Fis, I-80126 Naples, Italy
3. INFN, Sez Napoli, I-80126 Naples, Italy
4. Univ Naples Federico 2, MECENAS, I-80126 Naples, Italy
5. Complesso Univ Monte S Angelo, CNR SPIN, I-80126 Naples, Italy
6. Udr Napoli, CNISM, I-80126 Naples, Italy (literal)
- Titolo
- Homodyne estimation of quantum state purity by exploiting the covariant uncertainty relation (literal)
- Abstract
- We experimentally verify the uncertainty relations for the mixed states in tomographic representation by measuring the radiation field tomograms, i.e. homodyne distributions. Thermal states of a single-mode radiation field are discussed in detail as a paradigm of the mixed quantum state. On considering the connection between generalized uncertainty relations and optical tomograms, it is seen that the purity of the states can be retrieved by statistical analysis of the homodyne data. The purity parameter assumes a relevant role in quantum information where the effective fidelities of protocols depend critically on the purity of the information carrier states. In this context, the homodyne detector becomes an easy-to-handle purity-meter for the state on line with a running quantum information protocol. (literal)
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