Second-order correlation and squeezing of photons in cavities with ultrastrong magnon-photon interactions
| Autor: | Falch, Vemund, Brataas, Arne, Qaiumzadeh, Alireza |
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| Rok vydání: | 2024 |
| Předmět: | |
| Druh dokumentu: | Working Paper |
| Popis: | We investigate the second-order photon correlation function in cavity-magnon systems, focusing on ferromagnetic and antiferromagnetic cavities within the ultra-strong coupling regime, and extending beyond the rotating-wave approximation. By deriving exact integral solutions for the second-order correlation function, we demonstrate that counter-rotating magnon-photon interactions induce quadrature squeezing in the cavity mode. Furthermore, we show that tuning the anisotropic magnon-cavity couplings enhance the squeezing effect by changing the level repulsion of the magnon-cavity photon hybrid mode without increasing cavity photon occupation number. Our study reveals distinct quantum correlation behaviors in ferromagnetic and antiferromagnetic cavities: For ferromagnetic cavities, we show that squeezing increases with coupling strength asymmetry, whereas in antiferromagnetic case, magnon modes with opposite chirality suppress quantum effects and imposes a lower bound on correlation functions. These findings provide a pathway to optimize photon blockade and quantum information processing in magnon-cavity systems in the ultrastrong coupling limit. Comment: 14 pages, 6 figures |
| Databáze: | arXiv |
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