Teleportation-based noiseless quantum amplification of coherent states of light

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73610952" target="_blank" >RIV/61989592:15310/22:73610952 - isvavai.cz</a>
Result on the web
<a href="https://opg.optica.org/directpdfaccess/b127ab48-a473-4c28-9cb32cfc0c9fa8f9_466682/oe-30-2-1466.pdf" target="_blank" >https://opg.optica.org/directpdfaccess/b127ab48-a473-4c28-9cb32cfc0c9fa8f9_466682/oe-30-2-1466.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OE.443389" target="_blank" >10.1364/OE.443389</a>

Result language
angličtina
Original language name
Teleportation-based noiseless quantum amplification of coherent states of light
Original language description
We propose and theoretically analyze a teleportation-based scheme for the high-fidelity noiseless quantum amplification of coherent states of light. In our approach, the probabilistic noiseless quantum amplification operation is encoded into a suitable auxiliary two-mode entangled state and then applied to the input coherent state via continuous-variable quantum teleportation. The scheme requires conditioning on the outcomes of homodyne measurements in the teleportation protocol. In contrast to high-fidelity noiseless quantum amplifiers based on combination of conditional single-photon addition and subtraction, the present scheme requires only photon subtraction in combination with auxiliary Gaussian squeezed vacuum states. We first provide a pure-state description of the protocol which allows us to to clearly explain its principles and functioning. Next we develop a more comprehensive model based on phase-space representation of quantum states, that accounts for various experimental imperfections such as excess noise in the auxiliary squeezed states or limited efficiency of the single-photon detectors that can only distinguish the presence or absence of photons. We present and analyze predictions of this phase-space model of the noiseless teleamplifier.
Czech name
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Czech description
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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)

Project
<a href="/en/project/GA21-23120S" target="_blank" >GA21-23120S: Quantum filters for engineering optical quantum states and operations</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2022
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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