学术报告
学术报告

位置: 首页 > 学术报告 > 2022互博国际hooball官网 > 正文

Spin-Wave Physics At Low Temperatures Leading To Hybrid Opto-Magnonic Quantum Systems

发布时间:2022-11-01

讲座论坛 期数
主题 Spin-Wave Physics At Low Temperatures Leading To Hybrid Opto-Magnonic Quantum Systems 演讲者 Sebastian Knauer
时间 2022互博国际hooball官网11月02日 (周三) 22:00 机构 University of Vienna
地点 互联网

11月2日(本周三)晚上11:00,英国卡迪夫大学物理互博国际官网网页版物理学讲座,欢迎老师同学远程参加:

Title: Spin-Wave Physics At Low Temperatures Leading To Hybrid Opto-Magnonic Quantum Systems

Speaker: Sebastian Knauer (University of Vienna)

Venue: https://cardiff.zoom.us/j/89787954865?pwd=MGp0V3kwVnI0MUZnZTN3aEllTzR1QT09

Meeting ID: 897 8795 4865

Password: 479481

Modern quantum technologies rely on low temperatures for large-scale quantum computation [1], quantum simulation [2], for integrated quantum circuits [3], or quantum transducers [4]. In particular the latter ones are of great interest, as they vow to bridge the gap between different quantum systems coherently. A robust and highly integratable system to transfer quantum information between terahertz to gigahertz photons are spin waves, and their single quanta magnons [5]. To interconnect with individual quantum systems, such as photons [6], phonons [7] or fluxons [8], and to remove thermally excited magnons, these magnons also have to operate at ultralow temperatures. A system of choice is Yttrium-Iron-Garnet (YIG), with its remarkable properties, such as a low damping at room-temperature. In this work I will present our latest results on spin-wave propagation at ultralow temperatures. An example is given in Fig.1. Here we show a measured propagating spin-wave signal (|S12|) through a 70x2mm (thickness: 5.65#m) YIG sample on a 500#m thick Gadolinium-Gallium-Garnet substrate, at a temperature of 30mK in the Damon-Echbach configuration. Further, my presentation will directly lead to the future perspectives of hybrid Opto-Magnonic Quantum Systems. References 1. J.M. Hornibrook et al., PRA. 3, 024010 (2015). 5. 2. G. Pagano et al., Q. Sci. Technol. 4, 014004 (2019). 6. 3. M. Kiczynski et al., Nat. 606, 7915 (2022). 7. 4. R.W. Andrews et al., Nat. Phys. 10, 4 (2014). 8. A.V. Chumak et al., IEEE Transactions on Magnetics 31, 49664 (2022). D. Lachance-Quirion et al., APE 12, 070101 (2019). Y. Li et al., JAP. 128, 130902 (2020). O.V. Dobrovolskiy et al., Nat. Phys. 15, 477 (2019).