Cold damping of levitated optically coupled nanoparticles

Kód výsledku v 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>

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

Cold damping of levitated optically coupled nanoparticles

Popis výsledku v původním jazyce

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.

Název v anglickém jazyce

Cold damping of levitated optically coupled nanoparticles

Popis výsledku anglicky

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.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Optica

ISSN

2334-2536

e-ISSN

2334-2536

Svazek periodika

10

Číslo periodika v rámci svazku

9

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

7

Strana od-do

1203-1209

Kód UT WoS článku

001184848000001

EID výsledku v databázi Scopus

2-s2.0-85174883112