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Cold damping of levitated optically coupled nanoparticles
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SYSNO ASEP 0579379 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Cold damping of levitated optically coupled nanoparticles Author(s) Liška, Vojtěch (UPT-D) SAI
Zemánková, Tereza (UPT-D) SAI
Svak, Vojtěch (UPT-D) RID, SAI
Jákl, Petr (UPT-D) RID, ORCID, SAI
Ježek, Jan (UPT-D) RID, ORCID, SAI
Bránecký, Martin (UPT-D)
Simpson, Stephen Hugh (UPT-D) RID, SAI
Zemánek, Pavel (UPT-D) RID, SAI, ORCID
Brzobohatý, Oto (UPT-D) RID, ORCID, SAINumber of authors 0 Source Title Optica. - : Optical Society of America - ISSN 2334-2536
Roč. 10, č. 9 (2023), s. 1203-1209Number of pages 7 s. Publication form Online - E Language eng - English Country US - United States Keywords optical binding ; nanoparticles ; optical levitation Subject RIV BH - Optics, Masers, Lasers OECD category Optics (including laser optics and quantum optics) R&D Projects GF21-19245K GA ČR - Czech Science Foundation (CSF) EF16_026/0008460 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) Method of publishing Open access Institutional support UPT-D - RVO:68081731 UT WOS 001184848000001 EID SCOPUS 85174883112 DOI 10.1364/OPTICA.496072 Annotation 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. Workplace Institute of Scientific Instruments Contact Martina Šillerová, sillerova@ISIBrno.Cz, Tel.: 541 514 178 Year of Publishing 2024 Electronic address https://opg.optica.org/optica/fulltext.cfm?uri=optica-10-9-1203&id=537233
Number of the records: 1