<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Liška, Vojtěch</style></author><author><style face="normal" font="default" size="100%">Zemánková, Tereza</style></author><author><style face="normal" font="default" size="100%">Jákl, Petr</style></author><author><style face="normal" font="default" size="100%">Šiler, Martin</style></author><author><style face="normal" font="default" size="100%">Simpson, Stephen H.</style></author><author><style face="normal" font="default" size="100%">Zemánek, Pavel</style></author><author><style face="normal" font="default" size="100%">Brzobohatý, Oto</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">PT-like phase transition and limit cycle oscillations in non-reciprocally coupled optomechanical oscillators levitated in vacuum</style></title><secondary-title><style face="normal" font="default" size="100%">Nat. Phys.</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">LF</style></keyword><keyword><style  face="normal" font="default" size="100%">MF</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2024</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://www.nature.com/articles/s41567-024-02590-1</style></url></web-urls></urls><pages><style face="normal" font="default" size="100%">1–7</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;Nanoparticles levitated in an optical trap provide a versatile platform to study mechanical oscillators in a controlled environment with tuneable parameters. Recently, it has become possible to couple two of these optomechanical oscillators. Here we demonstrate the collective non-Hermitian dynamics of such a pair of non-conservatively coupled oscillators. We take advantage of the tunability of the optical interactions between the particles in our system and set the optical interaction between the particles to be purely non-reciprocal. By continuously varying the relative power of the trapping beams, we take the system through a transition similar to a parity–time phase transition. A Hopf bifurcation at a critical point results in the formation of collective limit cycle oscillations, resembling those observed in phonon lasers. These coupled levitated oscillators provide a platform for exceptional point optomechanical sensing and can be extended to multi-particle systems, paving the way for the development of topological optomechanical media.&lt;/p&gt;</style></abstract><notes><style face="normal" font="default" size="100%">&lt;p&gt;Publisher: Nature Publishing Group&lt;/p&gt;</style></notes></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Brzobohatý, Oto</style></author><author><style face="normal" font="default" size="100%">Duchaň, Martin</style></author><author><style face="normal" font="default" size="100%">Jákl, Petr</style></author><author><style face="normal" font="default" size="100%">Ježek, Jan</style></author><author><style face="normal" font="default" size="100%">Šiler, Martin</style></author><author><style face="normal" font="default" size="100%">Zemánek, Pavel</style></author><author><style face="normal" font="default" size="100%">Simpson, Stephen H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Synchronization of spin-driven limit cycle oscillators optically levitated in vacuum</style></title><secondary-title><style face="normal" font="default" size="100%">Nature Communications</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">LF</style></keyword><keyword><style  face="normal" font="default" size="100%">MF</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2023</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://doi.org/10.1038/s41467-023-41129-5</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">14</style></volume><pages><style face="normal" font="default" size="100%">5441</style></pages><language><style face="normal" font="default" size="100%">eng</style></language></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Y. Arita</style></author><author><style face="normal" font="default" size="100%">G. D. Bruce</style></author><author><style face="normal" font="default" size="100%">E. M. Wright</style></author><author><style face="normal" font="default" size="100%">S. H. Simpson</style></author><author><style face="normal" font="default" size="100%">P. Zemánek</style></author><author><style face="normal" font="default" size="100%">K. Dholakia</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">All-optical sub-Kelvin sympathetic cooling of a levitated microsphere in vacuum</style></title><secondary-title><style face="normal" font="default" size="100%">Optica</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">LF</style></keyword><keyword><style  face="normal" font="default" size="100%">MF</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2022</style></year><pub-dates><date><style  face="normal" font="default" size="100%">Sep</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://opg.optica.org/optica/abstract.cfm?URI=optica-9-9-1000</style></url></web-urls></urls><volume><style face="normal" font="default" size="100%">9</style></volume><pages><style face="normal" font="default" size="100%">1000–1002</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;We demonstrate all-optical sympathetic cooling of a laser-trapped microsphere to sub-Kelvin temperatures, mediated by optical binding to a feedback-cooled adjacent particle. Our study opens prospects for multi-particle quantum entanglement and sensing in levitated optomechanics.&lt;/p&gt;</style></abstract></record><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Simpson, Stephen H.</style></author><author><style face="normal" font="default" size="100%">Arita, Yoshihiko</style></author><author><style face="normal" font="default" size="100%">Dholakia, Kishan</style></author><author><style face="normal" font="default" size="100%">Zemánek, Pavel</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Stochastic Hopf bifurcations in vacuum optical tweezers</style></title><secondary-title><style face="normal" font="default" size="100%">Phys. Rev. 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