报告题目:Quantum mechanics with patterns of light

报  告  人:Prof. Andrew Forbes,University of Witwatersrand

报告时间:2019-06-04 09:00

报告地点:理科楼郑裕彤讲堂

报告摘要:Photons can be described in terms of their spatial modes – the “patterns” of light. As there are an infinite number of spatial modes, entanglement in this degree of freedom offers the opportunity to realise high-dimensional quantum states. In this talk I will review the recent progress in quantum entanglement of photons in their spatial degree of freedom. I will explain how to create high-dimensional quantum states in the laboratory, how to measure them, and what the present state of the art is in terms of applications. In particular, I will outline the advantages and disadvantages of using such entangled states as a means to encode information for secure quantum communication channels, and will consider the preservation of entanglement through noisy channels, e.g., a turbulent atmosphere. Finally, I will outline some ideas on mimicking quantum entanglement behaviour with classical light.