# Transmit and Receive Diversity in MIMO Quantum Communication for High-Fidelity Video Transmission
## 2 Related Works  
Quantum communication is an emerging discipline at the intersection of quantum mechanics [8] and information science, which uses the unique phenomena of quantum physics to revolutionize the way data are transmitted and secured. Two fundamental principles form the cornerstone of this field: quantum entanglement [9] and quantum superposition [10]. Quantum entanglement refers to the remarkable phenomenon in which pairs or groups of particles become interconnected so that the state of one instantaneously influences the state of another, regardless of the distance separating them. This nonclassical correlation has been the foundation for groundbreaking applications such as quantum key distribution (QKD) [11; 12; 13], which offers theoretically unbreakable encryption methods by exploiting the properties of entangled particles to securely share cryptographic keys. Similarly, quantum teleportation utilizes entanglement to transfer the quantum state of a particle to another distant particle, effectively transmitting information without moving the physical particle itself [14; 15]. Beyond secure key exchange, entanglement has been investigated for secure media transmission, including images and video, offering promising avenues to protect sensitive multimedia content [16; 17; 18]. On the other hand, quantum superposition gives quantum bits (qubits) the remarkable ability to exist in multiple states at the same time, unlike classical bits that can only represent a 0 or a 1 at any given moment. This unique property significantly increases the data capacity and parallelism that can be achieved in quantum communication systems. By encoding information into superposed qubits, it becomes possible to transmit multiple states of data simultaneously. This not only increases the potential throughput of the communication system, but can also enhance its resilience against noise, interference, and other channel impairments. Although some studies have explored the theoretical impact of superposition on communication complexity [19; 20; 21] and efficiency, and a few early applications have demonstrated its potential in basic image and video transmission using basic encoding and decoding techniques [22; 23; 24], the field is still in its early stages in terms of practical implementation. In particular, there is still a vast and largely untapped opportunity to combine quantum superposition with advanced quantum encoding techniques and robust error correction strategies. A practical, end-to-end quantum communication framework that leverages these capabilities is especially needed for demanding multimedia applications such as dynamic video transmission. Building such a system introduces unique challenges, including handling temporal dependencies between frames, supporting high data rates, and ensuring reliable reconstruction of the video stream despite the presence of channel noise and fading. Moreover, existing research has yet to fully investigate how quantum communication systems perform under realistic conditions where channel fading plays a critical role. In practical wireless and optical communication scenarios, fading caused by multipath propagation, mobility, and atmospheric disturbances can severely degrade signal quality and reliability. To address these challenges, classical communication systems often utilize MIMO technology [25; 26]. In MIMO, diversity reception techniques, such as time, frequency, and spatial diversity, are commonly employed to combat fading by leveraging multiple independent signal paths [27; 28; 29]. Over the years, researchers have developed various versions of MIMO systems and diversity schemes for a wide range of communication applications [30; 31; 32]. However, the advantages of these systems remain fundamentally limited by their classical nature, particularly in terms of noise resilience, latency, and system complexity. These limitations open the door to exploring alternative paradigms, particularly those based on quantum principles.