Overview

• Study authors report the first demonstration of ultrafast squeezed light and the first real-time measurement and control of quantum uncertainty with attosecond resolution.
• The method splits a laser into three identical beams focused into fused silica, enabling intensity squeezing and switching to phase squeezing via tiny angle or position adjustments.
• Measurements tracked phase and amplitude quadrature dynamics, showing that the uncertainty distribution can be tuned on ultrafast timescales.
• The team applied the technique to quantum communication, reporting a petahertz-scale protocol that encodes data on squeezed waveforms to hinder eavesdropping and flag intrusions.
• The work, led by Mohammed Hassan with collaborators in Spain and Germany, is presented as a proof-of-concept with potential for advanced sensing, chemistry, biology, and diagnostics.