TL;DR
This paper introduces a quantum dense coding protocol enabling a sender to securely transmit distinct messages to two receivers who must collaborate to unlock and access their messages, utilizing quantum entanglement and Fourier transform techniques.
Contribution
It proposes a novel simultaneous dense coding scheme with a locking mechanism, enhancing secure multi-party quantum communication.
Findings
The scheme guarantees simultaneous message delivery to receivers.
Quantum Fourier transform effectively acts as a locking operator.
Receivers must collaborate to unlock and access their messages.
Abstract
We present a dense coding scheme between one sender and two receivers, which guarantees that the receivers simultaneously obtain their respective messages. In our scheme, the quantum entanglement channel is first locked by the sender so that the receivers cannot learn their messages unless they collaborate to perform the unlocking operation. We also show that the quantum Fourier transform can act as the locking operator both in simultaneous dense coding and teleportation.
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