Quantum Communication and Decoherence

Jincheng Zhang

This paper investigates the optimization of quantum communication protocols leveraging the phenomenon of quantum decoherence. Traditional quantum communication protocols frequently rely on fixed parameter settings, often neglecting the dynamic influence of decoherence on channel performance. We propose a framework for dynamically adjusting protocol parameters based on real-time decoherence measurements. This framework aims to maximize communication efficiency and security by exploiting the controllable nature of decoherence. Specifically, we explore the relationship between interaction strength, decoherence time, and key protocol parameters such as pulse duration and detuning. The core claim is that by controlling these factors, optimal performance can be achieved. The proposed method offers a potential pathway to enhancing quantum communication robustness and scalability. Mathematical formulations are presented to quantify the impact of these parameters and guide the optimization process.

Harald Weinfurter, Anton Zeilinger

Hans Aschauer, Hans J. Briegel

In this contribution we will give a brief overview on the methods used to overcome decoherence in quantum communication protocols. We give an introduction to quantum error correction, entanglement purification and quantum cryptography. It is shown that entanglement purification can be used to create ``private entanglement'', which makes it a useful tool for cryptographic protocols.

Muhammad Annas Khan, Salman Ghafoor, Syed Mohammad Hassan Zaidi +2 more

In the aftermath of unparalleled disruptive technologies, the quantum realm has become a fundamental field of research due to unrivaled computational power and super-secure communication. In addition to conventional networks, a new word in the quantum domain is quantum network. The quantum network uses quantum communication (QC) to send quantum information bits known as qubits, to predetermined destination nodes. It governs the new quantum mechanics notions like superposition, quantum entanglement, the no-cloning theorem, and quantum teleportation. Quantum communication, like classical communication, is prone to noise, which is known as quantum decoherence. Quantum decoherence is a significant barrier to the implementation of a global quantum network. It deteriorates the quantum information, causing it to lie in an undetermined state. Environmental factors that cause quantum entanglement loss are the key factors that cause qubits to lose their states. To mitigate the impact of quantum decoherence, quantum error correction codes (QECC) and entanglement distillation have proved their potential. They add extra qubits or maintain entanglements among quantum networks. This survey presents quantum mechanics principles, quantum decoherence, and techniques to mitigate the effect of quantum decoherence. At the end, we highlighted some challenges in the realization of the quantum network, along with some projected applications.