Research On Photon Josephson Junction Based On Photon BEC

The phenomenon of Bose-Einstein condensation(BEC)has been observed in many Bose systems,but the Bose-Einstein condensation of photons does not exist in theory because the mass of photons is zero,The number of photons is not conserved,and the conditions for the formation of Bose-Einstein condensation are not met.But the BoseEinstein condensation of photons can be achieved by constructing special physical models and adding suitable materials to obtain an effective photonic mass and chemical potential.On the other hand,photons have very significant advantages compared with other carriers of quantum information,such as long coherence time and less susceptible to interference.The two condensates can form a Josephson junction by coupling to form a double potential well structure.Therefore,the photonic Josephson junction is constructed by the condensed matter of photons.This paper attempts to construct a new qubit implementation scheme through the photonic Josephson junction,and realize the regulation of qubits..This paper focuses on the research on the Josephson junction of photons,and the main work includes the following parts:1.For the construction of the photon Josephson junction model.Firstly,the BoseEinstein condensation model of photons is constructed.Based on this model,the Josephson junctions of photons are constructed and simulated.Due to the photon tunneling effect,the symmetry is broken and the energy level splits of photons are caused.The photon energy level is analyzed,and the electromagnetic field distribution law of different energy levels is analyzed.And the influence of cut-off waveguide structure parameters and refractive index on photonic frequency modulation is studied.2.Analysis of quantum mechanical effects in photonic Josephson junctions.The quantum mechanical state of the composite cavity is analyzed through the double-mode approximation theory,and the expression of the Hamiltonian is obtained through the mean field theory and the Gross-Pitaevskii formula,and the Hamiltonian is expressed in the Hilbert space.Calculate the eigenvalues and eigenvectors to obtain the energy levels and state distributions and adjustment methods in different states.The variation law of particle number and phase with time under different interaction strengths is studied.3.Analyze and study the effect of abnormal penetration of metals on photonic Josephson junctions.By simulating and analyzing the optical field distribution in an ideal metal material,the abnormal transmission phenomenon of the metal holes in the waveguide is analyzed,and the influence of the abnormal transmission phenomenon on the photon tunneling intensity and the regulation of the photon energy level are studied.The change of tunneling intensity caused by different structural parameters of the hole is studied,and then the regulation of qubits is realized.