![]() ![]() When the energy flowing in and flowing out of the system is finely balanced, an intermediate situation between being open and closed arises. Open systems are connected to the outer world, and via exchanges with the environment they are subject to energy gains and energy losses. Closed systems are isolated from any external environment, such that energy is conserved because there is nowhere for it to escape to. They have shown how the different quantum phases of such chains are associated with remarkable phenomena, which may be useful in the design of future quantum devices relying on strong correlations.Ī common distinction in physics is between open and closed systems. Two theoretical physicists, from the University of Exeter (United Kingdom) and the Norwegian University of Science and Technology (in Trondheim, Norway), have built a quantum theory describing a chain of quantum resonators satisfying space reflection and time reversal symmetries. ![]()
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