Abstract
In the system of a waveguide coupled with an array of atoms, we study the absorption and delayed reemission of light. By adjusting energy levels of atoms, we can engineer a dissipation channel of the atomic collective mode coupled to the waveguide, thereby realizing the high-fidelity absorption and delayed reemission. The fidelity reaches 1 under ideal conditions. The displacement of atoms from the ideal distribution reduces the fidelity in a regular waveguide. However, in the chiral waveguide, we find that the fidelity is robust even if atoms are randomly distributed. Such a system can be used as a quantum memory of photons.
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