Hybrid states of a cavity-photon–vortex coupled system in a superconductive cavity

• Published in: Applied physics letters Vol. 121; no. 19
• Main Authors: Wang, Lei, Shang, Xin, Liu, Haiwen, Min, Tai, Xia, Ke
• Format: Journal Article
• Language: English
• Published: Melville American Institute of Physics 07-11-2022
• Subjects: Applied physics; Ferromagnetism; Heterostructures; Hybrid systems; Parameters; Photons; Quantum computing; Quantum theory; Superconductors; Vortices
• ISSN: 0003-6951; 1077-3118
• DOI: 10.1063/5.0123823

As the Abrikosov vortex lattice has recently been found in van der Waals heterostructures constructed by a two-dimensional (2D) ferromagnet and a superconductor, we propose the realization of cavity-photon–vortex coupling in a superconductive cavity to construct a new hybrid quantum system in this paper. We study the corresponding hybrid states therein, including the exceptional lines (ELs) in the parameter space. Considering that the parameters of our system are adjustable by external magnetic field and temperature, our system and the ELs are much easier to be realized in experiments. Furthermore, the numerical results show that the corresponding hybrid states can be switched by tuning the source of AC, which makes this hybrid system more advantageous to realize hybrid quantum computing in the future. Moreover, for practical use in detecting hybrid states and the vortex dynamics, the transmission amplitude of an external transverse electric wave through the cavity is also studied.