SPICE Workshop on Quantum Functionalities of Nanomagnets, June 17th - 19th 2025
Denis Candido
In this work we will discuss and explore the use of magnon modes for applications in quantum information science. We will start by discussing our recent theoretical results which demonstrate magnons as mediators of coupling and entanglement between Nitrogen-Vacancy (NV) centers [1,2]. Next, we show how to experimentally determine the NV-NV coupling mediated by magnons for a diamond slab on top of a YIG bar [3]. This is obtained through the magnon-induced self-energy of the NV center, obtained by combining both room-temperature longitudinal T1 relaxometry and the fluctuation-dissipation and Kramers-Kronig relations [3]. Further, we discuss interfacing NV centers to different magnetic topological excitations. This includes the use of magnon modes for entangling quantum skyrmions [4], the use of NV center to study both gyrotropic modes in topological vortex magnetic states [5] and topological magnons [6].
[1] D. R. Candido, G. D. Fuchs, E. Johnston-Halperin, and M. E. Flatte, Materials for Quantum Technology 1, 011001 (2021).[2] M. Fukami, D. R. Candido, D. D. Awschalom, and M. E. Flatte, PRX Quantum 2, 040314 (2021).
[3] M. Fukami, J. C. Marcks, D. R. Candido, L. R. Weiss, B. Soloway, S. E. Sullivan, N. Delegan, F. J. Heremans, M. E. Flatté and D. D. Awschalom, Proc. Natl. Acad. Sci. U.S.A. 121 (2024).
[4] C. Psaroudaki and C. Panagopoulos, Phys. Rev. Lett. 127, 067201 (2021).
[5] E. T. Gomes da Silva, I. Luxmoore, C. Patrickson, P. Keatley, D. R. Candido, in preparation
[6] J. Leiberton and D. R. Candido, in preparation