Optical levitation of nanoparticles in vacuum Vojtěch Liška vliska@isibrno.cz Optical trapping/levitation main features Mechanical oscillator • Control all parameters of the equation of motion • Shaping of potential (force field) Gieseler et al., PRL. 9, 2012 )())(()()( ttxFtxtxm  =−+  Cooling to the quantum ground state Gieseler et al., PRL. 9, 2012 ISI F. Tebbenjohanns et al. PRL 2020 U. Delic et al, Science 2020 L. Magrini et al. Nature 2021 F. Tebbenjohanns et al. Nature 2021 n = 1 n = 0 n = 2 n = 3 ground state 𝐸 = 1/2ℏ𝜔 • Quantum experiments with massive particles • Two methods for reaching ground state – two setups at ISI Brno • Close cooperation with Vienna group Non-linear quantum experiments Optical binding and Quantum entanglement Svak et al. Optica 2021 • Quantum entanglement • Massive particles – Quantum Gravity Levitation on a Chip Photonic crystal cavity Photonic crystal fiber • Industry applications • Ultra-sensitive force detectors • Biological applications Institute of Scientific Instruments of CAS • Theoretical + experimental work • Excellent laboratory equipment • Paid summer internships • Research at ISI, study at MUNI