Pantheon SEMPARIS Le serveur des séminaires parisiens Paris

Statut Confirmé
Domaines cond-mat
Date Mercredi 27 Novembre 2019
Heure 14:00
Institut LPENS
Salle L363/365
Nom de l'orateur Northrup
Prenom de l'orateur Tracy
Addresse email de l'orateur
Institution de l'orateur Institut für Experimentalphysik, Universtität Innsbruck
Titre Towards quantum optomechanics with nanospheres and trapped ions
Résumé Macroscopic quantum states of mechanical oscillators have been proposed as quantum sensors and for tests of quantum mechanics in unprecedented regimes [1]. In the field of cavity optomechanics, a mechanical oscillator — such as a membrane or a levitated nanoparticle — is coupled to an optical or microwave resonator, and the interaction between light and motion can be harnessed to reach the quantum regime for the oscillator's center-of-mass motion [2]. However, such experiments are typically limited to the preparation of Gaussian states because they operate in a regime in which the photon-phonon interaction is linearized. One route to non-Gaussian states is to introduce a nonlinearity via a single cold atom or ion [3]. I will present an experimental platform under development in which we plan to couple both the center-of-mass motion of a silica nanoparticle and a dipole transition of a single calcium ion to an optical cavity. As a first step, we have recently demonstrated techniques for loading and charging nanoparticles in a Paul trap under ultra-high- vacuum conditions [4] as well as cooling of the particle's secular motion via electrical and optical feedback. Looking forward, I will discuss the role of trapped ions and the advantages of ion traps for quantum optomechanical experiments. [1] F. Fröwis, P. Sekatski, W. Dür, N. Gisin, and N. Sangouard, Rev. Mod. Phys. 90, 025004 (2018) [2] M. Aspelmeyer, T. J. Kippenberg, and F. Marquardt, Rev. Mod. Phys. 86, 1391 (2014) [3] A. C. Pflanzer, O. Romero-Isart, and J. I. Cirac, Phys. Rev. A 88, 033804 (2013) [4] D. S. Bykov, P. Mestres, L. Dania, L. Schmöger, T. E. Northup, Appl. Phys. Lett. 115, 034101 (2019)
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