…In this experiment, the cat inside the box can be both alive and dead at the same time (quantum superposition), and its state (dead or alive) is decided the moment the box is opened (measured)…

…Such quantum superposition and measurement are not only the foundation of quantum physics, but also guarantee the safety of quantum computing and cryptography…

…The research team derived and verified the information preservation relation for the first time in quantum measurement…

…Caption: Quantum information preservation relation and schematic diagram of quantum states subjected to ‘weak measurement’ and ‘reverting operations’ (G: information obtained by measurement, F: information remaining in quantum state after measurement, R: probability of successful reversion). Image Credit: Korea Institute of Science and Technology (KIST)…

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