Quantum entanglement shows that most physical systems can quickly reach thermal equilibrium through entanglement, and the specific time is proportional to the scale of the system.
When the degree of entanglement between particles increases, the information originally used to describe them will gradually become the overall description of all entangled particles, and eventually the association will contain all information, while the information of individual particles will be eliminated. Once this step is reached, the particles will enter an equilibrium state, and their state will not change, just like hot tea cooling to room temperature.
In quantum mechanics, when several particles interact, because the properties of each particle have been integrated into a whole, it is impossible to describe the properties of each particle separately, but only the properties of the whole system, so this phenomenon is called quantum entanglement or quantum entanglement. Quantum entanglement is a phenomenon that occurs purely in quantum systems. In classical mechanics, no similar phenomenon can be found.
Take two electrons in opposite directions but at the same speed as an example. Even if one went to the sun and the other to Pluto, they still kept in touch at such a long distance. That is, when one of the manipulated (such as quantum measurement) states changes, the other will also change states immediately.
This phenomenon leads to the suspicion of action at a distance, as if two electrons communicate secretly at superluminal speed, which seems to violate the so-called localization principle in special relativity.