Efficient polarization qubit transmission assisted by frequency degree of freedom

TL;DR

This paper proposes a robust method for transmitting polarization qubits by leveraging the frequency degree of freedom, ensuring high fidelity and success probability in noisy channels.

Contribution

It introduces a novel scheme that encodes quantum information in frequency states for stable transmission and later converts it back to polarization, achieving ideal fidelity and success rate.

Findings

Fidelity of transmitted quantum states is theoretically 1.

Success probability of the scheme is 1.

Frequency degree of freedom enhances transmission stability.

Abstract

We present an efficient arbitrary polarization qubit transmission scheme against channel noise by utilizing frequency degree of freedom, which is more stable in transmission surroundings. The information of quantum state is encoded in frequency state during the transmission and transferred to polarization state later. Both the fidelity of quantum state transmitted and the success probability of this scheme are 1 in principle.