Scientists have just unveiled the very first photo of quantum entanglement



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In an incredible first, scientists captured the world's first real photo of quantum entanglement – a phenomenon as odd as Einstein described it as a "remote phantasmagoric action".

The image was captured by physicists from the University of Glasgow in Scotland and is so breathtaking that we can not stop to watch.

This may seem like little, but think about it for a moment: this fuzzy gray image is the first time we see the particle interaction that underlies the quaint science of quantum mechanics and forms the basis of the Quantum computing.

Quantum entanglement occurs when two particles become inextricably linked, and what happens to one immediately affects the other, regardless of their distance. Hence the description of "phantasmagoric action at a distance".

This particular photo shows an entanglement between two photons – two particles of light. They interact and share the physical states for a moment.

Paul-Antoine Moreau, first author on the paper where the picture was unveiled, told the BBC that the picture was "an elegant demonstration of a fundamental property of nature".

To capture this incredible photo, Moreau and a team of physicists have created a system that sends tangled photon floods over what they have described as "unconventional objects."

The experiment consisted of capturing four photon images under four different phase transitions. You can see the full picture below:

Screen capture 2019 07 13 at 11h59.03(Moreau et al., Science Advances, 2019)

What you see here is actually a composite of several images of photons going through a series of four-phase transitions.

Basically, physicists have divided the entangled photons and passed through a beam in a liquid crystal material called β-barium borate, triggering four-phase transitions.

At the same time, they captured photos of the entangled pair passing through the same phase transitions, even if it had not crossed the liquid crystal.

You can see the configuration below, the entangled photon beam comes from the bottom left, half of the entangled pair splits left and goes through the four phase filters. The others that go straight have not gone through the filters, but have undergone the same phase changes.

Screenshot of the screen 2019 07 13 at 12:08.55(Moreau et al., Science Advances, 2019)

The camera was able to capture images of these images at the same time, showing that both had changed in the same way despite their split. In other words, they were entangled.

While Einstein was celebrating quantum entanglement, the late physicist John Stewart Bell helped define quantum entanglement and set up a test called "Bell Inequality". Basically, if you can break the Bell inequality, you can confirm the true quantum entanglement.

"We report here an experiment demonstrating the violation of a Bell inequality in the observed images," writes the team. Progress of science.

"This result paves the way for new quantum imaging schemes … and suggests promising perspectives for quantum information schemes based on spatial variables."

The search was published in Progress of science.

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