Quantum Physics2026-04-091 minarXiv:2604.08717expressLight as a Fingerprint: How to Read Quantum StatesA light pulse can be compared to a musical chord: several notes sound simultaneously, each with its own loudness and phase. In quantum optics, such 'chords' are called multimode squeezed states.Elina Sendonaris·Thomas Zacharias·Robert Gray·James Williams·Alireza MarandiRainer WeissAlain AspectAlbert Einsteinsqueezed statequantum opticsquantum sensingquantum measurementquantum state👍👎☆SimplePopularAdvanced