Photonic Quantum Information Experiments Based On Optical Field Modulating

Quantum mechanics is an emerging discipline in the 20th century,and its develop-ment has brought great revolutions to the world.Research on the basic issues of quantum physics has been in full swing.Quantum information is a new interdisciplinary subject of information science and quantum physics.The development of quantum commu-nication and quantum computing has become an important means to promote the de-velopment of human civilization at the current stage.Linear optical system,as one of the earliest and most mature systems for implementing quantum communication and quantum computing experimental solutions,has promising perspective.Besides,it also becomes a very effective platform in studying the fundamental problems of quantum physics.Preparation,measurement and manipulation of quantum states,as well as control-lable operation of quantum states with surroundings,play an important role in quantum physics research.Optical field modification provides an effective method for quantum information processing in linear optical systems.In this paper,we mainly focus on us-ing modified optical field for preparing and measuring of quantum states,also shaping the system-environment joint state in open system dynamics,so as to realize specific quantum information tasks on the photonic system.The main contents is included as following:1.Establishing high-dimensional orbital angular momentum entanglement source suitable for long-distance entanglement transmission,which is based on a PPKTP crys-tal and possesses high fidelity of 88.8%,and narrow bandwidth of 100G.We design and implement an orbital angular momentum mode dispersion pre-compensation de-vice.Based on this,one-kilometre length three-dimensional orbital angular momentum entanglement distribution was achieved and the high-dimensional non-locality was ver-ified.The distributed quantum state yields the fidelity up to 71%.Considering the noise type in the fiber,we represent a protocol for further expanding the dimensions and dis-tributing distance.2.Based on diffraction efficiency modulation,we designed a spectrum shaping de-vice which can be used to prepare the system and environmental states in open system dynamics,and hence simulate the arbitrary open system dynamical dephasing chan-nel.In addition,with the specific optical setup,we can measure the past-future correla-tion in open systems dynamics,which will cast a new light on research of the quantum Markovinity.3.We prepare of multi-photon entangled states by using sandwich-type beam-like entangled sources.The quantum correlation and quantum coherence of symmetric(W barW)and asymmetric(star)states in Markov decoherence channel have been stud-ied.Also the robustness of different quantum correlations under this channel have been explored,and the single-particle decoherence evolution can reflect the multi-body corre-lation structure.Exploring the evolution of different correlations in a noisy environment will benefit the application of different quantum resources in specific quantum tasks.4.We simulate the experiment result and analysis the possibility of quantum metrol-ogy in a non-Markovian Gaussian-like decoherence circumstance,and demonstrate the application of the quantum non-Markovinity as a resource in quantum metrology.Through the preparation of multi-photon GHZ states with particle number ranging from N=1 to N=6,we have shown that,with respect to the evolution which features ini-tial quantum Zeno dynamics with Gaussian decay,the scaling of the optimal frequency estimation accuracy will lie between the standard quantum limit and Heisenberg limit,which is called Zeno limit.