A Novel Method to against Quantum Noises in Quantum Teleportation

Abstract

In order to improve the anti-noise performance of quantum teleportation, this paper proposes a novel dynamic quantum anti-noise scheme based on the quantum teleportation which transmits single qubit state using Bell state. Considering that quantum noise only acts on the transmitted qubit, i.e., the entangled state that Alice and Bob share in advance is affected by the noise, thus affecting the final transmission result. In this paper, a method for dynamically adjusting the shared entangled state according to the noise environment is proposed. By calculating the maximum fidelity of the output state to determine the shared entangled state, which makes the quantum teleportation be affected by the noise as little as possible. This paper calculates the fidelity of teleportation under four kinds of channel noise (amplitude damping, phase damping, bit flip and depolarizing noise). The results show that the scheme has a suppression effect on phase damping, bit flip and depolarizing noise under certain conditions. When the noise intensity is larger, the optimized efficiency is better.

Special Quantum Steganalysis Algorithm for Quantum Secure Communications Based on Quantum Discriminator

“…This makes it difficult for potential eavesdroppers to detect the presence of secret information, and even if they do, extracting the secret information becomes challenging. Quantum steganography, which can be seen as the quantum counterpart of classical steganography, has been widely employed in the field of quantum secure communication [1][2]. Compared to classical steganography, quantum steganography schemes are designed with the characteristics of quantum mechanics, making them less susceptible to eavesdropping.…”