| Quantum mechanics just got even weirder |  |
Neues Experiment mit Verschränkungen:
The system has four-entangled observers and a state-of-the-art six-photon experiment and they showed that while one part of the system produced a measurement, the other showed that the measurement had not been done. Two realities were measured at once. The team argues that this strengthens the case of quantum theories whose framework is already observer-dependent.
[https://www.iflscience.com/physics/quantum-experiment-sees-two-versions-of-reality-existing-at-the-same-time/]