Efficient faithful qubit transmission with frequency degree of freedom
Xi-Han Li, Bao-Kui Zhao, Yu-Bo Sheng, Fu-Guo Deng, Hong-Yu Zhou
TL;DR
This paper introduces a method for transmitting qubits faithfully using frequency degrees of freedom, achieving high success probability and protecting against collective noise in quantum communication.
Contribution
It presents a novel scheme combining frequency and polarization degrees of freedom for efficient, probabilistic protection of single-photon polarization states during transmission.
Findings
Success probability of 1/2 in ideal conditions
Protection against collective noise
Utilizes frequency beam splitter and shifter
Abstract
We propose an efficient faithful polarization-state transmission scheme by utilizing frequency degree of freedom besides polarization and an additional qubit prepared in a fixed polarization. An arbitrary single-photon polarization state is protected against the collective noise probabilistically. With the help of frequency beam splitter and frequency shifter, the success probability of our faithful qubit transmission scheme with frequency degree of freedom can be 1/2 in principle.
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