Entanglement-Enhanced Radio-Frequency Field Detection and Waveform Sensing

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F17%3A73581356" target="_blank" >RIV/61989592:15310/17:73581356 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.119.043603" target="_blank" >https://journals.aps.org/prl/pdf/10.1103/PhysRevLett.119.043603</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.119.043603" target="_blank" >10.1103/PhysRevLett.119.043603</a>

Result language
angličtina
Original language name
Entanglement-Enhanced Radio-Frequency Field Detection and Waveform Sensing
Original language description
We demonstrate a new technique for detecting the amplitude of arbitrarily chosen components of radio-frequency waveforms based on stroboscopic backaction evading measurements. We combine quantum nondemolition measurements and stroboscopic probing to detect waveform components with magnetic sensitivity beyond the standard quantum limit. Using an ensemble of 1.5 x 10(6) cold rubidium atoms, we demonstrate entanglement-enhanced sensing of sinusoidal and linearly chirped waveforms, with 1.0(2) and 0.8(3) dB metrologically relevant noise reduction, respectively. We achieve volume-adjusted sensitivity of delta B root V approximate to 3.96 ft root cm(2)/Hz, comparable to the best rf magnetometers.
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
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)

Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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