Imagine communicating with your bank, the IRS or your doctor by way of an Internet that was perfectly secure. Your most private data would be protected with absolute certainty and, better yet, if any bad actor were to try to eavesdrop you would know immediately. Such is the promise of secure quantum communication.
Should quantum communication ever become the standard—if there is ever to be a quantum Internet, for instance—technical challenges lie ahead. Among the most critical will be devices that can send and receive quantum data. To that end, researchers at Stanford University have created a novel quantum light source that might someday serve as the basis for quantum communication. They explained their findings in a paper published by the journal Nature Photonics.
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