Cold damping of levitated optically coupled nanoparticles

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F23%3A00579379" target="_blank" >RIV/68081731:_____/23:00579379 - isvavai.cz</a>
Result on the web
<a href="https://opg.optica.org/optica/fulltext.cfm?uri=optica-10-9-1203&id=537233" target="_blank" >https://opg.optica.org/optica/fulltext.cfm?uri=optica-10-9-1203&id=537233</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1364/OPTICA.496072" target="_blank" >10.1364/OPTICA.496072</a>

Result language
angličtina
Original language name
Cold damping of levitated optically coupled nanoparticles
Original language description
Methods for controlling the motion of single particles, optically levitated in vacuum, have developed rapidly in recent years. The technique of cold damping makes use of feedback-controlled, electrostatic forces to increase dissipation without introducing additional thermal fluctuations. This process has been instrumental in the ground-state cooling of individual electrically charged nanoparticles. Here we show that the same method can be applied to a pair of nanoparticles, coupled by optical binding forces. These optical binding forces are about three orders of magnitude stronger than typical Coulombic inter-particle force and result in a coupled motion of both nanoparticles characterized by a pair of normal modes. We demonstrate cold damping of these normal modes, either independently or simultaneously, to sub-Kelvin temperatures at pressures of 5 × 10−3 mbar. Experimental observations are captured by a theoretical model that we use to survey the parameter space more widely and to quantify the limits imposed by measurement noise and time delays. Our work paves the way for the study of quantum interactions between meso-scale particles and the exploration of multiparticle entanglement in levitated optomechanical systems.
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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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