The Manipulation Of Light Based On Quantum Interference

The control of quantum system using quantum coherence is the core of quantum infor-mation and finally we can make coding, storage and transmission of information. To achieve coherent manipulation preferably, we need to find a appropriate physical system to realize the control and operation on the dynamic and steady state. With the fastest propagation velocity, strong stability and good ability to avoid environmental disturbance, photon system has already become one of the most ideal and popular physical systems to realize the quantum information processing. The operation on photon system is necessary to take advantages of photon system for quantum computation.In recent ten years, the researchers on the control of photon system are mainly concen-trated on fast light, slow light and the quantum information storage based, which are based on the electromagnetic induced transparency (EIT) and optomechanically induced transparency (OMIT), and single photon quantum devices et al. The work of this paper is mainly focused on two aspects:One is to find the other systems except the atomic system and optomechani-cal system to realize induced transparent, so we can realize the control of the flow of photons. Another aspect is to realize the unconventional photon blockade (UPB), namely to realize the control for the single photon, whose application is to realize the single photon source, which belongs to the category of quantum devices. The physical principle of unconventional photon blockade and induced transparency is quantum interference of photons.Firstly, we elaborated the research background of the paper in the chapter 1, we in-troduced the development history and the current research status of induced transparency and photon blockade in this part as the foreshadowing of the whole paper. After that, we introduced the basic physical concepts and knowledge in the chapter 2, including the basic knowledge related to open system, the induced transparency and the photon blockade.The part from chapter 3 to chapter 7 can be divided into two parts, which is our main job. The first part is the chapter 3 and chapter 4, in which we found another form of the induced transparency, namely second order nonlinear induced transparency. We studied the degenerate second order nonlinear system in the third chapter. We found that when we drove in the low frequency and detected in the high frequency, the second order nonlinear induced transparency phenomena will happen, whose direct application is to measure the second order nonlinear coefficient. We also studied the Kerr nonlinear effect on second order nonlinear induced transparency and found Kerr nonlinear can control the width and symmetry of the transparent window. We studied the non-degenerate second order nonlinear system in the fourth chapter and found that double induced transparent window would appear, and we can realize the conversion between double and single transparent windows by changing the detunings of the system.The second part of this thesis is chapter 5,6, and 7. We studied the unconventional photon blockade in this section. In the chapter 5, we studied the unconventional photon blockade of two model second-order nonlinear system and compare it with Kerr nonlinear system. Different from Kerr nonlinear systems, we found that the second order nonlinear system do not need the coupling J(a^+b^+b^+a^) because that the second order nonlinear both has the effect of nonlinear and the effect of transmission between different mode of photon. Unconventional photon blockade can occur only for two drives because the interference path cannot be formed for single drive. In the chapter 6, we studied the unconventional photon blockade of the three-mode system based on the second order nonlinear and found that with the single drive, blockade can occur only on the condition that detuning is zero. In contrast, in the case of two drives, the blockade was not restricted by detuning. We studied unconventional photon blockade based on two-photon tunneling in chapter 7.Finally, the summary and prospect of the paper are given in chapter 8.