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This research demonstrates that phonon focusing can be observed in solids at room temperature, removing the need for expensive cryogenic setups to study wave-like heat transport. This breakthrough could significantly accelerate thermal management strategies essential for scaling high-performance quantum processors and next-generation electronics. The ability to manipulate heat waves under ambient conditions represents a pivotal step toward practical integration of these phenomena into real-world hardware architectures.
Engineers observe quantum heat waves at room temperature

Efficient heat management in solids is key to advancing the next generation of electronics. However, wave-like heat movement—known as phonon focusing—had been observed only at extremely low, or cryogenic, temperatures, limiting its study and practical use.
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