Deterministic generation of nonclassical state of light

The development of deterministic generation of nonclassical states of light is crucial for advancements in optical quantum information processing, quantum communication, and quantum networks. However, achieving this capability is inherently challenging as it requires strong optical nonlinearity at the single or few photon level.

Our research group is dedicated to the advancement of new schemes and devices that enable the deterministic generation of nonclassical light using cavity quantum electrodynamics (cavity QED). Our focus extend beyond single-photon generation. We aim to develop deterministic sources capable of producing various types of nonclassical light states, including photonic graph states that are proved useful for quantum repeaters and optical quantum computers.

Our device relies on self-assembled InAs quantum dots coupled with nanophotonic cavities. This platform offers the potential for achieving the highest cooperativity and throughput efficiency among all optical cavity QED platforms, due to the large dipole moment of the quantum dot and the integrated nature of the nanophotonic devices contribute to this advantage. In addition to the development of these novel devices, we are actively exploring techniques for efficient and scalable integration of our quantum light source with optical fibers and large-scale programmable integrated photonics. This integration will enable seamless interfacing with existing optical communication infrastructure and facilitate the realization of practical quantum information processing systems.

Through our research, we aim to contribute significantly to the field of quantum information science by providing reliable and efficient sources of nonclassical light. By pushing the boundaries of what is possible in deterministic light generation, we anticipate transformative advancements in optical quantum technologies and their widespread application in various domains.