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The best carrier for quantum information transmission is light signals, which have fast propagation speeds and can carry large amounts of information. However, during the propagation of light, dispersion and diffraction effects can cause quantum information distortion within a certain range. In contrast, optical solitons are formed due to the balance between the system's dispersion (diffraction) and nonlinear effects, and they exhibit very high stability and fidelity. Therefore, they have received widespread attention in electromagnetically induced transparency (EIT) media with ultracold atoms. However, cold atomic gas media require extremely low operating temperatures, and the performance of the materials is difficult to control precisely. These factors are unfavorable for the miniaturization and integration of future information devices, thus presenting significant limitations in practical applications. Semiconductor quantum dot media, on the other hand, possess advantages such as discrete energy level structures and spectral properties similar to those of cold atomic gases, longer decoherence times, larger electric dipole moments, more significant nonlinear optical effects, and ease of integration, making them an ideal alternative to cold atomic media. This paper couples semiconductor quantum dots with optical fibers, the most common carrier in optical communication, to explore the formation, storage, and retrieval of temporal optical solitons in the coupled system. The results show that due to the tunneling-induced transparency effect between dots in semiconductor quantum dot molecules, light absorption in the system is greatly suppressed. At the same time, the transverse confinement of the nanofiber can enhance the interaction between light and the system, and the enhanced nonlinear response of the system can balance the dispersion effect, resulting in stable temporal optical solitons. Further research indicates that by turning the inter-dot tunneling coupling on and off, high-efficiency and high-fidelity storage and retrieval of optical solitons can be achieved in the system. These findings have certain guiding significance and potential application value for all-optical information processing in solid quantum materials.
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Keywords:
- Tunneling induced transparency /
- The storage and retrieval of the optical solitons /
- Semiconductor quantum dot /
- Nanofiber
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