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In transferring information through the means of superdense coding, entangled pair of two qubits is used. Can we use superdense coding with unentangled pair of qubits too?

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  • $\begingroup$ I guess the whole idea of superdense coding lies on the infomation theoretic benefits of having entangled qubits. $\endgroup$
    – Johan-Luca
    Commented Jul 10, 2023 at 14:39
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    $\begingroup$ Superdense coding by definition uses shared entanglement. Did you mean, without shared entanglement, whether you can send 2 classical bits by communicating one qubit? The answer is no, as the Holevo bound suggests you can communicate at most 1 classical bit by sending 1 qubit. $\endgroup$
    – Abir
    Commented Jul 10, 2023 at 14:40
  • $\begingroup$ @Abir Thank you, understood $\endgroup$ Commented Jul 10, 2023 at 19:43

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