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Q: Fachverband Quantenoptik und Photonik
Q 29: Optomechanics I
Q 29.5: Talk
Wednesday, March 16, 2022, 11:45–12:00, Q-H13
Synchronization of two levitated nanoparticles via direct dipole-dipole coupling — •Manuel Reisenbauer1, Livia Egyid1, Anton Zasedatelev1,2, Iurie Coroli1,2, Benjamin A. Stickler3, Henning Rudolph3, Markus Aspelmeyer1,2, and Uros Delic1,2 — 1University of Vienna, A-1090 Vienna, Austria — 2IQOQI, Austrian Academy of Sciences, A-1090 Vienna, Austria — 3University of Duisburg-Essen, 47048 Duisburg, Germany
Synchronization is the phenomenon of multiple oscillators moving in unison despite their intrinsic frequencies being non-degenerate. This not only locks their frequencies/phases together, but the system also experiences lower phase noise, promising increased sensing performance over a single oscillator.
Systems up to date show only dynamics of frequencies of the coupled oscillators, neglecting phase dynamics completely. Also, separate readout of the individual oscillator position is impossible in many integrated systems, restricting the analysis to collective signatures only.
We present an experiment with two nanoparticles levitated in parallel optical tweezers, employing a direct optical dipole-dipole coupling to synchronize their motion. We present conclusive signatures of synchronization and show the transition from individual oscillators to a synchronized state. Our work shows possible applications to sensing and metrology employing the reduction of phase noise below the thermomechanical limit of each individual oscillator. Finally, we discuss the scalability of our system to large arrays of trapped particles and its operation in the quantum regime.