
Prof. Jietai Jing
State Key Laboratory of Precision Spectroscopy, East China Normal University, China
Title: Construction of all-optical quantum information protocols based on atomic ensembles
Abstract:
Quantum information utilizes quantum resources to realize high-security, high-fidelity, and high-capacity information processing. With the development of quantum information technology, a series of quantum information protocols based on discrete and continuous variables have been developed, including quantum key distribution, quantum teleportation, entanglement swapping, quantum dense coding, quantum cloning, and so on. In the continuous variable regime, some quantum information protocols need optic-electro and electro-optic conversions, which limits the bandwidth of information processing. Therefore, it is essential to develop all-optical quantum information protocols without these conversions. The core idea of constructing all-optical quantum information protocol is to replace optic-electro and electro-optic conversions with low-noise optical parametric amplifier. Recently, the four-wave mixing process based on a double-Λ atomic energy level diagram has been proved to be a promising way for the construction of low-noise optical parametric amplifiers and the generation of continuous variable entangled states. Therefore, it is promising to realize all-optical quantum information protocol by using low-noise optical parametric amplifier and entangled states based on four-wave mixing process. In this report, we will introduce a series of all-optical quantum information protocols that we have recently implemented based on the four-wave mixing process, including all-optical quantum teleportation protocol, the all-optical entanglement swapping protocol, and the all-optical quantum cloning protocol. Our work provides a platform for the realization of all-optical quantum information network.
Biography:
Prof. JING Jietai is from State Key Laboratory of Precision Spectroscopy, East China Normal University, Shanghai, China. His research activities are focused on quantum optics and quantum information, especially the generation of high-capacity, multi-beam, low-noise quantum light sources, and their applications in quantum information.