Researchers at Aalto University in Finland have developed a new cyclic quantum heat engine based on a superconducting circuit, and experimentally proved that weak heat on a quantum scale can also be converted into measurable energy output. The results of the study have been published in the British journal Nature Communications. According to a press release issued by Aalto University a few days ago, heat engines are devices that convert heat energy into usable energy, and steam engines, automobile engines, and many power generation equipment operate according to this principle. In recent years, with the development of quantum technology, scientists have begun to explore how the laws of thermodynamics work on a quantum scale and whether tiny heat in quantum systems can be used to complete energy conversion. The quantum heat engine developed this time is only a few millimeters in size and consists of superconducting qubits, resonators, and quantum refrigeration equipment. The working principle is to convert the small amount of heat lost by the quantum system cooled to near absolute zero into usable energy. Experimental results show that in an environment close to absolute zero, the weak heat in a quantum system can be converted into measurable energy output.

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