报告题目：Quantum technologies for trapped molecular ions
报 告 人：Prof.Stefan Willitsch (Department of Chemistry, University of Basel, Switzerland )
报告时间：2024-03-27 10:00
报告地点：理科楼C302
报告摘要：Molecules are quantum systems of prime significance in a variety of contexts ranging from physics over chemistry to biology. In spite of their importance, the development of quantum technologies for molecules has remained a long-standing challenge due to their complex energy-level structures. Trapped molecular ions are particular attractive in this context as it is possible to observe, manipulate and control single isolated molecules under precisely controlled conditions. We will give an overview of the current state-of-the-art in the field of molecular-ion quantum technologies and highlight some salient applications. We will focus on recently developed quantum-non-demolition techniques for the non-destructive detection of the internal quantum states of single trapped molecular ions [1,2,3]. These approaches offer new perspectives not only for the detection, but also for the preparation and the manipulation of molecular quantum states on the single-particle level with a sensitivity several orders of magnitude higher compared to previous schemes. We will discuss applications of these techniques in the realms of precision molecular spectroscopy and chemistry [4,5].
[1] M. Sinhal and S. Willitsch, "Molecular-ion quantum technologies", p. 305 ff. in "Photonic Quantum Technologies: Science and Applications", ed. M. Benyoucef, Wiley-VCH 2023 (arXiv: 2204.08814)
[2] M. Sinhal, Z. Meir, K. Najafian, G. Hegi and S. Willitsch, "Quantum non-demolition state detection and spectroscopy of single trapped molecules”, Science 367 (2020), 1213
[3] A. Shlykov, M. Roguski, and S. Willitsch, "Optimized strategies for the quantum-state preparation of single trapped nitrogen molecular ions”, Adv. Quant. Technol. (2023), 2300268
[4] K. Najafian, Z. Meir, M. Sinhal and S. Willitsch, "Identification of molecular quantum states using phase-sensitive forces”, Nat. Commun. 11 (2020), 4470
[5] K. Najafian, Z. Meir and S. Willitsch, ”From megahertz to terahertz qubits encoded in molecular ions: theoretical analysis of dipole-forbidden spectroscopic transitions in N2+”, Phys. Chem. Chem. Phys. 22 (2020), 23083
报告人简介：Stefan Willitsch graduated in natural sciences from ETH Zurich (Switzerland) in 2000 and received his PhD from ETH in 2004 with a dissertation on high-resolution molecular spectroscopy. From 2004–07, he was a Junior Research Fellow at the University of Oxford (UK). He was appointed lecturer in physical chemistry at University College London (UK) in 2007 and joined the the University of Basel (Switzerland) in 2008 as professor of chemical and molecular Physics. His research focuses on the development of quantum technologies for molecular systems with applications in precision measurements, sensing and chemical-reaction studies.
