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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

  • DOI - Digital Object Identifier

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&gt; and |alpha_2&gt;, respectively. The third mode is prepared either in the state |alpha_1&gt; or in the state |alpha_2&gt;. 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

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

  • 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

  • EID of the result in the Scopus database