Experimental demonstration achieved 93% visibility for quantum communication over 1-km channel, highlighting frequency-bin qubits.
We demonstrate a quantum link employing frequency-bin qubits. Bragg-scattering four-wave mixing is used to encode and measure the qubit, and we obtain a 93% visibility over a 1-km communication channel without using active feedback to compensate for depolarization.
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motlagh et al. (2025) studied this question.
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