Study Of Photon And Phonon Blockade And Antibunching Effects

Quantum optics has been born nearly 60 years.It has at.tracted many scientists to study.In the 21st century,with the development of single photon technology,it has become an important research that single photon has high efficiency,stability and high indistinguishability,can be searched in the field of quantum information and quantum computing.In order to realize the photon antibunching effect,scien-tists have proposed many schemes,such as superconducting circuit,four-level quan-tum emitter coupling with photonic crystal nano-cavity,weakly nonlinear photonic molecule,coupled quantum dot cavity system and photomechanical systemIn this thesis,we propose three schemes,we have achieve effective photon anti-bunching effect under the condition of weak drive in the first and second schemes and realize phonon blocking by quadratic couplingand in the third scheme.The first one,there are two third-order nonlinear optical modes in the optical cavity,we com-pare the analytical solution and numerical solution by the schrodinger equation and the master equation,thus to observe antibunching effect.In the first scheme,we study the quantum effects of two modes in the cavity which satisfy the third-order nonlinearity.In the second scheme,we study the antibunching effect by placing a metal nano-ion in an optical cavity.Under the condition of low coupling,photon blocking can be achieved in first and second shemes,namely unconventional photon blocking.They can improve the feasibility of experiment.In the third scheme,we explored the quantum effects of phonons by a quadratic coupling model.By observ-ing the anti-bunching region of the system and calculating its optimal conditions,it can be concluded that the anti-bunching effect of the first scheme is the strongest and the coupling strength of the second scheme is required While the third scheme has a wider range of applications,it can be seen that the three schemes have their own advantages.