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Initialization of neutral and charged exciton spin states in a telecom-emitting quantum dot

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Demonstration of qubit writing and spin-preserving excitation in quantum dots, indicating advancements for photonic states.

Qubit writing of a neutral exciton was successfully demonstrated, enhancing quantum information applications.
The method showed spin-preserving excitation of a negative trion, important for quantum-state manipulation.
Using Larmor precession, the in-plane g factors of electrons and holes were accurately determined in quantum dots.
A lower bound coherence time of 6.4 ns for holes was measured, promoting their use in advanced quantum schemes.

Peniakov et al. (2025) studied this question.

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