👉 Dephasing is a phenomenon in quantum mechanics that describes how a system's quantum state changes over time due to thermal fluctuations. This means that the system's energy levels and wave functions are not constant but rather vary over time, as they are subject to fluctuations. Dephasing can be described as the gradual change of a quantum state in a system over time without any observable change in the system's properties (such as temperature or pressure). It is often associated with processes such as thermal transitions and deco