Multistep Two-Copy Distillation of Squeezed States via Two-Photon Subtraction
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73615357" target="_blank" >RIV/61989592:15310/22:73615357 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.129.273604" target="_blank" >https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.129.273604</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.129.273604" target="_blank" >10.1103/PhysRevLett.129.273604</a>
Alternative languages
Result language
angličtina
Original language name
Multistep Two-Copy Distillation of Squeezed States via Two-Photon Subtraction
Original language description
Squeezed states are nonclassical resources of quantum cryptography and photonic quantum computing. The higher the squeeze factor, the greater the quantum advantage. Limitations are set by the effective nonlinearity of the pumped medium and energy loss on the squeezed states produced. Here, we experimentally analyze for the first time the multistep distillation of squeezed states that in the ideal case can approach an infinite squeeze factor. Heralded by the probabilistic subtraction of two photons, the first step increased our squeezing from 2.4 to 2.8 dB. The second step was a two-copy Gaussification, which we emulated. For this, we simultaneously measured orthogonal quadratures of the distilled state and found by probabilistic postprocessing an enhancement from 2.8 to 3.4 dB. Our new approach is able to increase the squeeze factor beyond the limit set by the effective nonlinearity of the pumped medium.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
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)
Others
Publication year
2022
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 LETTERS
ISSN
0031-9007
e-ISSN
1079-7114
Volume of the periodical
129
Issue of the periodical within the volume
27
Country of publishing house
US - UNITED STATES
Number of pages
6
Pages from-to
"273604-1"-"273604-6"
UT code for WoS article
000912378400001
EID of the result in the Scopus database
2-s2.0-85145433473