LG Specialists Suggest New Protocol for Quantum Communication
| Date | January 9, 2023 |
|---|---|
| Source | Nature |
In a recent study published by Nature on January 9, LG specialists have proposed a new protocol for quantum communication. This protocol aims to enhance data transfer speed and improve overall security.
Previous limitations in quantum communication were primarily due to the “dead time” of single-photon detectors used in this field. Even the most advanced detectors, such as superconducting nano-wire single-photon detectors, imposed restrictions on the speed of data transfer through direct quantum connection.
The new protocol, called Quantum Secure Direct Communication (QSDC), utilizes two optical degrees of freedom to encode information: temporal and phase states of quantum particles. The phase state helps determine quantum bit errors and identify potential attackers within the communication channel, while the temporal state is used for error assessment and transmitting messages.
Unlike previous protocols that relied on a single quantum state, this new approach allows the transmission of multiple bits of information within a single quantum state. This is achieved through innovative coding methods based on differential time delays.
According to Benon Kyu Ana, the lead author of the study, the new protocol eliminates the need for quantum memory, bilateral data structures, and constant verification for detecting attackers within the channel. These drawbacks in the previous DL04 protocol significantly reduced data transmission efficiency.
The study not only proposes a new protocol but also conducts security and modeling analysis to validate its effectiveness. The results demonstrate significant improvements in both data transfer speed and security compared to existing protocols. This breakthrough development holds substantial promise for the field of quantum communications.