Overview
- Google's homepage, which featured the Doodle Tuesday, shows a qubit using the Bloch sphere visualization.
- The animation contrasts a classical bit that is 0 or 1 with a qubit that can exist in a superposition of both states.
- World Quantum Day takes place each April 14, a date chosen to echo the 4.14 digits of Planck's constant.
- Researchers from more than 65 countries proposed the observance in 2021, and the first global celebration was held in 2022.
- The United Nations named 2025 the International Year of Quantum Science and Technology, and organizers encourage talks, lab tours, exhibitions and art that link quantum ideas to phones, MRI scans and internet search.