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Both reciprocity and time reversal symmetry limit the ways in which light and sound waves function.
The explosion in wireless data usage across the world has been one of the great economic drivers of the last decade, and the global need for cheap, high-data-rate wireless access is expected to continue to grow rapidly for at least another decade. The new EFRI awards will build upon recent advances in materials science and engineering research. For example, last year, Columbia University engineering researchers invented integrated circuits that can allow radios to simultaneously transmit and receive on the same frequency, instead of requiring two separate frequencies as is typically the case.
Credit: Harish Krishnaswamy, Columbia University
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Related story: NSF wants engineering researchers to bend rules (of classical physics)