Quantum information theory is a rapidly growing interdisciplinary field that combines principles from quantum mechanics, computer science, and mathematics to study the processing, transmission, and storage of information at the quantum level. It deals with the fundamental properties of quantum systems and explores how these properties can be harnessed for various information processing tasks such as quantum computing, quantum cryptography, and quantum communication. Researchers in this field aim to understand how quantum systems can be used to perform computational tasks that are exponentially faster or more secure than what is possible with classical systems. Additionally, it investigates how quantum information can be manipulated and transmitted in a reliable and secure manner, paving the way for future advancements in quantum technology.