https://doi.org/10.1140/epjd/s10053-021-00321-2
Regular Article – Quantum Optics
Photon antibunching in a cavity-QED system with two Rydberg–Rydberg interaction atoms
1
Lanzhou Center for Theoretical Physics, Key Laboratory of Theoretical Physics of Gansu Province, Lanzhou University, 730000, Lanzhou, Gansu, China
2
Key Laboratory for Magnetism and Magnetic Materials of the Ministry of Education, Lanzhou University, 730000, Lanzhou, China
Received:
14
September
2021
Accepted:
30
November
2021
Published online:
22
December
2021
We propose how to achieve strong photon antibunching effect in a cavity-QED system coupled with two Rydberg–Rydberg interaction atoms. Via calculating the equal time second-order correlation function 
, we find that the unconventional photon blockade and the conventional photon blockade appear in the atom-driven scheme, and they are both significantly affected by the Rydberg–Rydberg interaction. We also find that under appropriate parameters, one obtains the extremely strong photon antibunching by combining the conventional photon blockade and the unconventional photon blockade, and the mean photon number in the cavity can be improved significantly. In the cavity-driven scheme, the existence of the Rydberg–Rydberg interaction severely destroys the photon antibunching under the unconventional photon blockade mechanism. These results will help to guide the implementation of the single photon emitter in the Rydberg atoms-cavity system.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021
