Sequential phonon measurements of atomic motion

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989592%3A15310%2F22%3A73610027" target="_blank" >RIV/61989592:15310/22:73610027 - isvavai.cz</a>
Result on the web
<a href="https://iopscience.iop.org/article/10.1088/2058-9565/ac3c52/pdf" target="_blank" >https://iopscience.iop.org/article/10.1088/2058-9565/ac3c52/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/2058-9565/ac3c52" target="_blank" >10.1088/2058-9565/ac3c52</a>

Result language
angličtina
Original language name
Sequential phonon measurements of atomic motion
Original language description
The motion of trapped atoms plays an essential role in quantum mechanical sensing, simulations and computing. Small disturbances of atomic vibrations are still challenging to be sensitively detected. It requires a reliable coupling between individual phonons and internal electronic levels that light can readout. As available information in a few electronic levels about the phonons is limited, the coupling needs to be sequentially repeated to further harvest the remaining information. We analyze such phonon measurements on the simplest example of the force and heating sensing using motional Fock states. We prove that two sequential measurements are sufficient to reach sensitivity to force and heating for realistic Fock states and saturate the quantum Fisher information for a small amount of force or heating. It is achieved by the conventionally available Jaynes-Cummings coupling. The achieved sensitivities are found to be better than those obtained from classical states. Further enhancements are expectable when the higher Fock state generation is improved. The result opens additional applications of sequential phonon measurements of atomic motion. This measurement scheme can also be directly applied to other bosonic systems including cavity QED and circuit QED.
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
<a href="/en/project/GC19-19722J" target="_blank" >GC19-19722J: Robust quantum metrology beyond Gaussian resources</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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