Effects of coherence on temporal resolution

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F21%3A73607370" target="_blank" >RIV/61989592:15310/21:73607370 - isvavai.cz</a>
Result on the web
<a href="https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.3.033082" target="_blank" >https://journals.aps.org/prresearch/pdf/10.1103/PhysRevResearch.3.033082</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevResearch.3.033082" target="_blank" >10.1103/PhysRevResearch.3.033082</a>

Result language
angličtina
Original language name
Effects of coherence on temporal resolution
Original language description
Measuring small separations between two optical sources, either in space or in time, constitutes an important metrological challenge as standard intensity-only measurements fail for vanishing separations. Contrarily, it has been established that appropriate coherent mode projections can appraise arbitrarily small separations with quantum-limited precision. However, the question of whether the optical coherence brings any metrological advantage to mode projections is still a point of debate. Here, we elucidate this problem by experimentally investigating the effect of varying coherence on estimating the temporal separation between two single-photon pulses. We show that, for an accurate interpretation, special attention must be paid to properly normalize the quantum Fisher information to account for the strength of the signal.
Czech name
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Czech description
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Project
<a href="/en/project/GA18-04291S" target="_blank" >GA18-04291S: Ultimate resolution limits in optical detection and metrology.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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