Ben Turner is a U.K. based staff writer at Live Science. He covers physics and astronomy, among other topics like tech and climate change. He graduated from University College London with a degree in particle physics before training as a journalist.
Time may not be a fundamental element of the universe but rather an illusion emerging from quantum entanglement, a new study suggests.
"There exists a way to introduce time which is consistent with both classical laws and quantum laws, and is a manifestation of entanglement," first author Alessandro Coppo, a physicist at the National Research Council of Italy, told Live Science."The correlation between the clock and the system creates the emergence of time, a fundamental ingredient in our lives."
Yet, according to Einstein's theory of general relativity — which describes larger objects, such as our bodies, stars and galaxies — time is interwoven with space and can be warped and dilated at high speeds or in the presence of gravity. This leaves our two best theories of reality at a fundamental impasse. Without its resolution, a coherent theory of everything remains out of reach.
To resolve this problem, the researchers turned to a theory called the Page and Wootters mechanism. First proposed in 1983, the theory suggests that time emerges for one object through its quantum entanglement with another acting as a clock. For an unentangled system, on the other hand, time does not exist, and the system perceives the universe as frozen and unchanging.
"We strongly believe that the correct and logical direction is to start from quantum physics and understand how to reach classical physics, not the other way around," Coppo said.
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