Photo:NIST physicist Dave Howe aligns a laser beam to pass through a tiny glass cell of rubidium atoms inside the cylindrical magnetic shield. The atoms are the heart of an atomic magnetometer demonstrated as a receiver for magnetic radio. These very low frequency (VLF) digitally modulated magnetic signals can travel farther through building materials, water, … Continue reading “Quantum Radio” May Offer New Twist on Communicating in Problematic Environments