Solitons In Bose-Einstein Condensation Of Exciton Polaritons

The exciton-polariton is a new quasi-particle with boson properties formed by the strong coupling of the exciton and cavity photon.Due to its small effective mass and strong interaction,theoretically,Bose Einstein Condensates(BEC)can be achieved at standard low temperatures or even at room temperature.It not only brings new research topics to basic research,but also has broad prospects for the development and application of quantum devices in the future.It has become one of the hot topics in the research of low temperature physics and condensed matter physics.In this paper,we study the existence and physical properties of dissipative soliton in a non-resonantly pumped Bose-Einstein condensates of exciton-polariton in the semiconductor microcavity system.The paper is divided into three parts,the specific contents are as follows:The first part of this paper briefly introduces the research progress of excitonpolariton,material wave soliton in the Bose-Einstein condensation and research status in the exciton-polariton condensation.The second part of this paper describes the basic structure and exciton of the semiconductor microcavity,the basic theory of the exciton-polariton and the formation process and properties of the exciton-polariton condensate.In the third part,we first analyze non-resonant pumped exciton-polariton condensate and its stability.On this basis,we study the existence and features of dissipative solitons.Through the numerical simulation method,we find that steady-state dark solitons can spontaneously generate and persist for a long time.Due to the existence of dissipation,dark solitons also show interesting properties,such as oscillation,explosions,abrupt decay and so on.Secondly,we study the effect of the lossesC? on the dark soliton.Without changing other parameters,we find that dark solitons can be created in a largeC? range and the range of pumps for solitons with differentC? is also different;but a larger range of pumping,better stability,morelonger life of dark Solitons only can be produced in a certain range.Finally,we study the effects of the pump edge.Under low pump,a new state,anti-dark soliton,is generated when the parameters satisfyRC D C D Rgg(28)??11.It has some oscillations self-localized peak formed by two opposing nonlinear waves.It does not depend on the scope of the pump,and multiple solitons can created simultaneously through the modulation.The results of the above research will not only promote the research and development of the basic field,but also provide a theoretical basis for the future application of quantum technology.