Unambiguous coherent state identification: Searching quantum database
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14330%2F07%3A00020701" target="_blank" >RIV/00216224:14330/07:00020701 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Unambiguous coherent state identification: Searching quantum database
Original language description
We consider an unambiguous identification of an unknown coherent state with one of two unknown coherent reference states. Specifically, we consider two modes of an electromagnetic field prepared in unknown coherent states |alpha_1> and |alpha_2>, respectively. The third mode is prepared either in the state |alpha_1> or in the state |alpha_2>. The task is to identify (unambiguously) which of the two modes are in the same state. We present a scheme consisting of three beamsplitters capable toperform this task. Although we do not prove the optimality, we show that the performance of the proposed setup is better than the generalization of the optimal measurement known for a finite-dimensional case. We show that a single beamsplitter is capableto perform an unambiguous quantum state comparison for coherent states optimally. Finally we propose an experimental setup consisting of 2N-1 beamsplitters for unambiguous identification among N unknown coherent states. This setup can be
Czech name
Jednoznačná identifikace koherentních stavů: Prohledávání kvantové databáze
Czech description
Analýza jednoznačné identifikace neznámého koherentního stavu, který je jedním ze dvou možných referenčních stavů.
Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
IN - Informatics
OECD FORD branch
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Result continuities
Project
<a href="/en/project/GA201%2F07%2F0603" target="_blank" >GA201/07/0603: Quantum multipartite computation, communication and security</a><br>
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2007
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review A
ISSN
1050-2947
e-ISSN
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Volume of the periodical
Vol. 76
Issue of the periodical within the volume
No. 2
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
"A022326"
UT code for WoS article
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EID of the result in the Scopus database
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