In the course of a unique experiment, an international group of scientists stated that it is possible to turn the clock back without violating the second law of thermodynamics. It says that for all spontaneous processes in nature, one-pointedness is characteristic. So, for example, hot bodies inevitably cool down with time, at the same time cold ones by themselves will never heat up.
However, scientists still managed to prove that this thermodynamic “time arrow” is not an absolute concept. During the experiment, they used correlated particles, conceptually similar to the entangled particles used during quantum research.
The researchers began an experiment with a molecule of trichloromethane, consisting of hydrogen and carbon. They made the core of the hydrogen atom warmer than the carbon atom, while observing the energy flow.
While the cores were uncorrelated, the heat spread as expected – from the hot core to the cold one, but as soon as they were correlated, the heat flowed back, back to the hot core, making it hotter and the colder cold.
According to research, during the research the second law of thermodynamics was not violated, since it does not take into account correlated particles. In other words, the experiment recorded only an exception to the rules.