Science
Science
Out of context: Reply #169
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Physicists at University of Queensland, Australia have simulated time travel using particles of light. The researchers achieved this by simulating the behavior of a single piece of light–a particle of energy–traveling on a closed timelike curve (CTC)–a closed path in space-time. The work may help to understand the longstanding problem of how time-travel could be possible in the quantum world and how the theory of quantum mechanics might change in the presence of closed timelike curves.