Time travelling ducks could settle these time questions quickly
Tom KirkmanIndependent Project Manager
Pretty sure Time Travelling Ducks could clear up these Science questions pretty quickly.
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“Time may not be a fundamental element of the universe but rather an illusion emerging from quantum entanglement, a new study suggests.
Time is a thorny problem for physicists; its inconsistent behavior between our best theories of the universe contributes to a deadlock preventing researchers from finding a “theory of everything,” or a framework to explain all of the physics in the universe.
But in the new study, researchers suggest they may have found a clue to solving that problem: by making time a consequence of quantum entanglement, the weird connection between two far-apart particles.
The team published their findings May 10 in the journal Physical Review A.
“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.”
In quantum mechanics, our best theory of the microscopic world, time is a fixed phenomenon — an inexorable, unidirectional flow from the past to the present.
It remains external from the bizarre and ever-changing quantum systems it measures and can be seen only by observing changes to outside entities, such as the hands of a clock.
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.
“It seems there is a serious inconsistency in quantum theory,” Coppo said. “This is what we call the problem of time.”
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.
By applying the Page and Wootters mechanism to two entangled but noninteracting theoretical quantum states
— one a vibrating harmonic oscillator and the other a set of tiny magnets acting as a clock —
the physicists found that their system could be perfectly described by the Schrödinger equation, which predicts the behavior of quantum objects.
Yet, in place of time, their version of the famous equation ran according to the states of the tiny magnets acting as a clock. …”