Figure 2: Experimental time-bin quantum key distribution setup. (IMAGE)

Light Publishing Center, Changchun Institute of Optics, Fine Mechanics And Physics, CAS

Figure 2: Experimental time-bin quantum key distribution setup.

Caption

Figure 2: Experimental time-bin quantum key distribution setup. A laser pulse is used to excite a quantum dot loaded in a cryostat cooled to 4K. The emitted single photons are extracted, filtered, and sent to the encoder, where three time-bin states are randomly encoded onto them. The time-bin qubits are decrypted at the receiver setup from Bob, which consists of a decoder, superconducting nanowire single-photon detector (SNSPD), and a time-to-digital converter (TDC). FPC: fiber polarization controller; PPS: programmable power source

Credit

Credit: Light: Science & Applications (2026). DOI: 10.1038/s41377-026-02205-9

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