Quantum coherence refers to the phenomenon in a quantum system where particles exhibit wave correlations. In the realm of Liquid crystals, quantum coherence can be observed as the behavior of molecules maintaining phase connections over long distances. This kind of coherence plays a role in the functioning of systems such as quantum computers and sensors, where preserving quantum states without decoherence is essential. Liquid crystal (LC) devices, like twisted TN) LCs, have the ability to manipulate light polarization, phase, and rotation, making them well-suited for optical quantum computing applications. Terazawa and colleagues investigated optical logic operations using TN LCs in a Mach Zehnder interferometer to control quantum light interference. They demonstrated alterations in optical interference states and photon counts at levels . These LC devices facilitate encoding quantum bits (qubits) by modifying the polarization state of light, enabling the superposition of 0 and 1 states for executing quantum logic operations. Studies have showcased how we can control the polarization of light in pathways using TN LCs in setups like Mach Zehnder interferometers . Studies by Terazawa and colleagues demonstrated alterations in optical interference patterns, and photon counts at different levels, highlighting the potential for incorporating LC devices into logic operation elements. In their experiment, a change in interference pattern was observed when voltage was applied to the TN LC cell, resulting in fluctuations in photon numbers under weak lighting conditions. At 1 V, there was no interference due to a 90-degree shift in laser beam polarizations. However, at voltages of 2 V or higher, interference patterns started emerging as the laser beam polarization gradually changed. The study revealed a ring pattern in the interference image, indicating the interference between two laser beams, with fringe patterns shifting as the voltage increased. Photon counting experiments showed a decrease in photon counts and saturation at 0.77 counts at 5 V, underscoring alterations in interference scenarios with changes in voltage . These findings underscore the effectiveness of TN LCs in achieving quantum coherence and controlling optical interference states, setting the stage for advancements in quantum information processing. Harnessing the potential to manipulate quantum coherence and entanglement within crystals shows prospects for advancing cutting-edge quantum technologies.