https://doi.org/10.1140/epjd/s10053-023-00619-3
Regular Article – Quantum Optics
Unconventional magnon blockade in a superconducting qubit coupled magnomechanical system
Department of Physics, Vidyasagar University, 721102, Midnapore, India
Received:
29
October
2022
Accepted:
16
February
2023
Published online:
13
March
2023
In this study we theoretically and numerically analyze the magnon statistics properties of a weakly driven qubit–magnon–phonon system consisting of a magnon mode in a ferromagnetic yttrium iron garnet (YIG) coupled to a transmontype superconducting qubit and also to the mechanical mode of vibration of the YIG sphere. We analytically determine the optimal magnon detuning required for occurrence of magnon blockade in weak Kerr nonlinear regime. We also numerically evaluate the second order magnon correlation function and plot it against different system parameters to find that the numerical results are in agreement with analytical optimal conditions. we study the dependence of magnon statistics (second-order correlation function) on different system parameters (magnon–phonon coupling strength, magnon detuning and Kerr nonlinearity) in a weakly driven qubit coupled magnomechanical system consisting of a suerconducting qubit, a magnon mode and a mechanical modes where the magnon mode is coupled with both the qubit and mechanical modes. The system exhibits unconventional blockade (i.e at weak nonlinearity), with the value of second-order correlation function in the range of 
–
indicating very strong magnon antibunching.
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