Single-photon frequency manipulation with an atom under external ultrastrong driving*

The manipulation of light-matter interaction at the single-photon level in the field of waveguide QED is essential in quantum photonics and attracts growing recent interest. Here, we propose a theoretical scheme to achieve all-optical single-photon frequency manipulation with the quantum transport in an atom-waveguide coupled system, where an external field strongly drives two excited states of the V-type three-level atom. Such ultrastrong drive field breaks the rotating-wave approximation. We investigate the quantum interference characteristics including virtual transitions with the single-photon quantum transport, and further explore the possibilities for manipulating the single-photon quantum state by the drive field in the spectral domain [1]. Our work shows potential route towards all-optical spectral manipulation of the photon, which could be important for the quantum information processing.

[1] H. Xiao, L. Wang, L. Yuan, and X. Chen, ACS Photonics 7, 2010 (2020).