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Q: Fachverband Quantenoptik und Photonik
Q 48: Poster – Quantum Optics, Technologies, and Optomechanics
Q 48.31: Poster
Mittwoch, 12. März 2025, 17:00–19:00, Tent
Desorption-induced decoherence of nanoparticle motion — •Jonas Schäfer1, Benjamin A. Stickler2, and Klaus Hornberger1 — 1Faculty of Physics, University of Duisburg-Essen, Lotharstraße 1, 47048 Duisburg, Germany — 2Institute for Complex Quantum Systems, Ulm University - Albert-Einstein-Allee 11, D-89069 Ulm, Germany
Levitated nanoparticles are well suited for sensing applications and fundamental tests of quantum theory [1,2]. Their center-of-mass motion can be prepared in the ground state [1] and future experiments will probe the quantum regime of their rotation dynamics [3]. Motivated by these experimental advances, we present the master equation describing the impact of desorption on their ro-translational quantum state. The Lindblad operators, which can be related to the local flux of desorbates from the particle surface, account for both the momentum and angular momentum kicks, as well as for the information contained in the anisotropy of the desorbate flux. For well localized states the dynamics can be characterized by a matrix of diffusion tensors (and a photophoretic force), known from classical treatments [4].
[1] Gonzalez-Ballestero, Aspelmeyer, Novotny, Quidant, and Romero-Isart, Science 374, eabg3027 (2021)
[2] Stickler, Hornberger, and Kim, Nat. Rev. Phys. 3, 589-597 (2021)
[3] Gao, van der Laan, Zielińska, Militaru, Novotny and Frimmer, PRR 6, 033009 (2024)
[4] Martinetz, Hornberger, and Stickler, PRE 97, 052112 (2018)
Keywords: Optomechanics; Rotations; Decoherence; Diffusion; Markovian master equation