Induced Splitting of Photons in an Electromagnetic Field

Jingtao Zhang, Feng Xun-Li, Xu Zhi-Zhan

The emission spectra of a two-level atom moving in an electromagnetic field are studied. We find that there is a shift in the peak position and that each peak splits into double peaks. The shift is due to the detuning induced by the atomic motion, and the splitting is caused by the atomic energy change due to the exchange of photons.

Lazar Mayants

Alessandro Ferreri

We study the photon-graviton pair production induced by the propagation of a classical electromagnetic (EM) wave in a Minkowskian spacetime. In our model, the gravitational field is described in terms of the quantized graviton field, whereas the electromagnetic field is split into a classical drive (a linearly or circularly polarized electromagnetic wave) and a quantum fluctuation field. We analyze the time evolution of the quantum state showing that, among other outcomes, the propagation of the EM wave can generate Bell states in the photon-graviton polarization basis. We finally discuss the possibility to observe entangled photons in artificial and natural scenarios.

S.S. Sannikov

V. I. Ritus

Xiaohong Liu, Jie Liang, Changjun Chen +2 more

The traceability of microwave electric field is measured based on the Rydberg atomic quantum interference effect. The rubidium atomic vapor cell at room temperature is used as the probe, and the Autler-Townes splitting of two-photon electromagnetically-induced transparency, three-photon electromagnetically-induced transparency and three-photon electromagnetically-induced absorption effect are analyzed theoretically. The measurement limit of atomic shot noise is also discussed. This method is not only suitable for the traceability and self-calibration measurement of the microwave electric field but also for the sub-wavelength imaging and vector measurement of the microwave electric field and will provide a reference for further miniaturization and integration of the atomic microwave probe.