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Physicists Move Light Simultaneously Back and Forth in Time

The achievement is a significant step towards forming a unified theory of quantum gravity

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Aditya Saikrishna
Aditya Saikrishna
I am 21 years old and an avid Motorsports enthusiast.

UNITED STATES: For the first time, scientists have created the illusion that light is moving simultaneously forward and backward in time. 

An international team of researchers came up with a new method that scientists could use to develop novel methods for quantum computing and gain a deeper comprehension of quantum gravity.

A combination of two principles from the bizarre field of quantum mechanics allowed the accomplishment.

A “quantum time flip,” in which a photon is simultaneously in both forward and backward time states, was achieved by two research groups working side by side in their experiments.

Researchers accomplished this through the convergence of charge, parity, and time-reversal (CPT) symmetry and quantum superposition, both principles of quantum mechanics that describe the physical properties of atoms and subatomic particles.

The previous quantum superposition is a peculiarity. It is so because minuscule particles exist in a few distinct states until they are noticed.

At the same time, the last option, CPT, is a rule that expresses that any framework containing particles will comply with similar actual regulations, regardless of the precise switching of their charges, spatial directions, and developments.

A widely regarded example of superposition is Schrödinger’s Cat experiment. In the thought experiment, a hypothetical cat is alive and dead simultaneously because the cat’s life depends on a random subatomic event that occurs and doesn’t occur until it is observed.

The October 31 and November 2 papers, which published the results of each team’s twin experiments, have not yet been peer-reviewed.

During their experiments, the researchers used superposition to give a photon, a light particle, the ability to travel both forward and backward in time.

Both teams split a photon through a crystal in a superposition of two distinct paths. In addition to the regular movement of the superposed photon through the crystal, the teams devised a second route to alter the photon’s polarization, or point in space, to make it appear to be travelling backward in time.

The scientists then made the superposed photons move through another crystal to recombine. After that, they measured the polarisation of the photons and discovered a quantum interference pattern. If the photon were travelling in both directions, this pattern, which consists of light and dark stripes, would not be possible.

Their findings may advance quantum computing processing because they demonstrated that time flips could be linked to reversible logic gates to enable simultaneous computation in both directions.

In addition, the work contributes to the scientific community’s comprehension of quantum mechanics. It may aid in the search for a unified theory of quantum gravity that integrates the general theory of relativity and quantum mechanics principles.

Also Read: NASA Merges Two Images of Pillars of Creation Taken by JWST to Create a Stunning Picture 


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