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Negative Wigner function at telecommunication wavelength from homodyne detection

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73581244" target="_blank" >RIV/61989592:15310/17:73581244 - isvavai.cz</a>

  • Result on the web

    <a href="https://journals.aps.org/pra/pdf/10.1103/PhysRevA.95.061802" target="_blank" >https://journals.aps.org/pra/pdf/10.1103/PhysRevA.95.061802</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1103/PhysRevA.95.061802" target="_blank" >10.1103/PhysRevA.95.061802</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Negative Wigner function at telecommunication wavelength from homodyne detection

  • Original language description

    Quantum states of light having a Wigner function with negative values represent a key resource in quantum communication and quantum information processing. Here we present the generation of such a state at the telecommunication wavelength of 1550 nm. The state is generated by means of photon subtraction from a weakly squeezed vacuum state and is heralded by the &quot;click&quot; of a single photon counter. Balanced homodyne detection is applied to reconstruct the Wigner function, also yielding the state&apos;s photon-number distribution. The heralding photons are frequency up-converted to 532 nm to allow for the use of a room-temperature (silicon) avalanche photodiode. The Wigner function reads W(0,0) = -0.063 +/- 0.004 at the origin of phase space, which certifies negativity with more than 15 standard deviations.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10306 - Optics (including laser optics and quantum optics)

Result continuities

  • Project

    <a href="/en/project/GB14-36681G" target="_blank" >GB14-36681G: Center of Excellence for Classical and Quantum Interactions in Nanoworld</a><br>

  • Continuities

    P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Others

  • Publication year

    2017

  • 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

    2469-9926

  • e-ISSN

  • Volume of the periodical

    95

  • Issue of the periodical within the volume

    6

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    5

  • Pages from-to

    "061802-1"-"061802-5"

  • UT code for WoS article

    000404012500002

  • EID of the result in the Scopus database