Hardy's Paradox Finally Confirmed: Landmark Experiment Shakes Local Realism

SciTechDaily ^ | October 9, 2024 | University of Science and Technology of China

[SunkenCiv]

A research team from the University of Science and Technology of China (USTC) of the Chinese Academy of Sciences (CAS), led by Prof. Jianwei Pan, Qiang Zhang, and Kai Chen, in collaboration with CHEN Jingling from Nankai University, has achieved the loophole-free test of Hardy's paradox for the first time. The team successfully demonstrated Hardy's nonlocality, closing both the detection efficiency loophole and the locality loophole...

Hardy's paradox, introduced by Lucien Hardy in the 1990s, offers a simplified test of local realism—the classical idea that physical properties exist independently of observation and that no signals exceed the speed of light. This paradox exposes the conflict between quantum mechanics and local realism by demonstrating that, under certain conditions where three "Hardy events" have a zero probability, quantum mechanics predicts a non-zero probability for a fourth event, which contradicts local realism.

Experimentally confirming Hardy's paradox is challenging due to the low probability of the fourth event, requiring high fidelity and efficiency in entanglement sources to distinguish it from noise. Prior experiments faced two main challenges: the locality loophole, where measurement choices could affect outcomes, and the detection efficiency loophole, due to optical losses.

In addressing the locality loophole, the researchers meticulously crafted a space-time experimental setup that ensured the measurement choices were spacelike separated from both the entangled state preparations and the photon detections. This configuration precludes any possibility of the measurement settings being influenced by the outcomes, thereby eliminating the locality loophole.

[SunkenCiv]

Vulnerability-free Hardy paradox test experimental device diagram.

Credit: Si-Ran Zhao et.al

[SunkenCiv]

https://search.brave.com/search?q=lippy+the+lion+and+hardy+har+har

https://search.brave.com/search?q=hardy+boys

[SunkenCiv]

Thanks for the link!

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[BipolarBob]

And here I wasted all my laboratory time trying to solve the Hardly Paradox. back to the drawing board.

[oldplayer]

WHAT?

[Fester Chugabrew]

This stuff blows my mind.

[Wuli]

In sum, it means????

[SunkenCiv]

Allen Sherman “One Hippopotami” — if you have to ask, you’re probably too young.

https://www.youtube.com/watch?v=umlBrQoG6xk

[Magnum44]

[PIF]

Laurel and Hardy
https://en.wikipedia.org/wiki/Laurel_and_Hardy

[2nd Amendment]

My greatest achievement was solving pi r squared. Pie r round cornbread r square

[mmichaels1970]

So we can check THAT off of our lists.

[Governor Dinwiddie]

I finally solved it,

[SunkenCiv]

:^)

https://search.brave.com/search?q=pi+to+how+many+places&source=desktop&summary=1

[Raycpa]

You cannot imagine how relieved I am on hearing this news.

[maro]

Actually, the upshot of this experiment is to shake our confidence in common sense, since the experiment allegedly shows that even in non quantum, Newtonian contexts, physical reality is affected by human observation. In other words, the Heisenberg principle holds true in space and time scales in which Newton’s laws govern.

[Celtic Conservative]

The understanding of these theories is beyond about 99% of the population. I’ve tried on a few occasions and as soon as I think I’m getting close to understanding even a little bit of it, my brains hide in a corner and sulk for a few hours.

CC

[Chode]

[Dr. Sivana]

I watched the unexceptional “Lippy the Lion and Hardy Har-Har” cartoons as a youngster. At the time, I didn’t know that lions and hyenas weren’t supposed to get along, so I didn’t get the joke. It is almost a trope in 1960-70s cartoons that animal enemies/weird combos team up:

Hong Kong Phooey (dog)/Spot (cat)
Courageous Cat and Minute Mouse
Quick Draw McGraw (horse)
Touche Turtle/Dum Dum (sheep dog)
Secret Squirrel/Morocco Mole
Peter Potomus/So-So (monkey)
Rocky the Flying Squirrel/Bullwinkle J. Moose

[Pilsner]

By also incorporating undetected events and double-click events into their analysis through a refined form of Hardy’s inequality, the researchers effectively closed the detection efficiency loophole, presenting a robust experimental framework that stands as a significant contribution to the field of quantum physics.

Really? I'm skeptical the researchers have solved the modial interaction of magneto-reluctance and capacitive diractance issue, without the use of turbo encabulators, which are not shown on the diagram.