Quantum networks are intended to connect distant processors the way the internet connects computers. The difference is that the information flowing across these networks follows the rules of quantum mechanics. To be useful, that information must sit still long enough to be processed and then travel without losing coherence. Those two demands usually conflict. In the paper “All-mechanical coherence protection and fast control of a spin qubit,” published in Nature Physics, Eliza Cornell, Zhujing X
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Touch the back of a laptop, and the warmth you feel is energy that has already been paid for, processed by chips, and then dissipated as heat. The work by Toshimasa Fujisawa and colleagues, reported in Communications Physics as “Efficient heat-energy conversion from a non-thermal Tomonaga-Luttinger liquid” and summarized in the TechXplore piece “A new approach to energy harvesting opened up by the quantum world,” asks a simple but radical question: what if that waste heat could be turned back i
