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In a Quantum Future, Which Starship Destroys The Other?

29 Aug 2019, 07:54 UTC
In a Quantum Future, Which Starship Destroys The Other?
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Quantum mechanics boasts all sorts of strange features, one being quantum superposition – the peculiar circumstance in which particles seem to be in two or more places or states at once. Now, an international group of physicists led by Stevens Institute of Technology, University of Vienna and University of Queensland flip that description on its head, showing that particles are not the only objects that can exist in a state of superposition – so can time itself.“The sequence of events can become quantum mechanical,” said co-author Igor Pikovski, a physicist at the Center for Quantum Science and Engineering at Stevens Institute of Technology. “ We looked at quantum temporal order where there is no distinction between one event causing the other or vice versa. So at the same time, A can cause B and B can cause A, in a quantum loop that blurs the lines of cause and effect.” The work, reported in the August 22 issue of Nature Communications, is among the first to reveal the quantum properties of time, whereby the flow of time doesn’t observe a straight arrow forward, but one where cause and effect can co-exist both in the forward and backward direction. In the ...

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