Skip to main content

The 2022 Nobel Prize in physics to the three scientists

 

From  The Nobel Prize 2022

Edited by - Amal Udawatta


The Royal Swedish Academy of Sciences has decided to award the 2022 Nobel Prize in Physics to Alain Aspect, John F. Clauser and Anton Zeilinger “for experiments with entangled photons, establishing the violation of Bell inequalities and pioneering quantum information science.”

Alain Aspect, John Clauser and Anton Zeilinger have each conducted groundbreaking experiments using entangled quantum states, where two particles behave like a single unit even when they are separated. Their results have cleared the way for new technology based upon quantum information.

The ineffable effects of quantum mechanics are starting to find applications. There is now a large field of research that includes quantum computers, quantum networks and secure quantum encrypted communication.

One key factor in this development is how quantum mechanics allows two or more particles to exist in what is called an entangled state. What happens to one of the particles in an entangled pair determines what happens to the other particle, even if they are far apart.

For a long time, the question was whether the correlation was because the particles in an entangled pair contained hidden variables, instructions that tell them which result they should give in an experiment. In the 1960s, John Stewart Bell developed the mathematical inequality that is named after him. This states that if there are hidden variables, the correlation between the results of a large number of measurements will never exceed a certain value. However, quantum mechanics predicts that a certain type of experiment will violate Bell’s inequality, thus resulting in a stronger correlation than would otherwise be possible.

John Clauser developed John Bell’s ideas, leading to a practical experiment. When he took the measurements, they supported quantum mechanics by clearly violating a Bell inequality. This means that quantum mechanics cannot be replaced by a theory that uses hidden variables.

Some loopholes remained after John Clauser’s experiment. Alain Aspect developed the setup, using it in a way that closed an important loophole. He was able to switch the measurement settings after an entangled pair had left its source, so the setting that existed when they were emitted could not affect the result.

Using refined tools and long series of experiments, Anton Zeilinger started to use entangled quantum states. Among other things, his research group has demonstrated a phenomenon called quantum teleportation, which makes it possible to move a quantum state from one particle to one at a distance.

“It has become increasingly clear that a new kind of quantum technology is emerging. We can see that the laureates’ work with entangled states is of great importance, even beyond the fundamental questions about the interpretation of quantum mechanics,” says Anders Irbäck, Chair of the Nobel Committee for Physics.

Learn more

Press release: https://bit.ly/3BLf9gK

Popular information: https://bit.ly/3R3qZYZ

Advanced information: https://bit.ly/3Sa43IS

 


Labels:

Comments

Post a Comment

Popular posts from this blog

New Comet SWAN Now Visible in Small Scopes

     From :- Sky & Telescope  By :- Bob King  Edited by :- Amal Udawatta This spectacular image of Comet SWAN (C/2025 F2) was taken on April 6th and shows a bright, condensed coma 5′ across and dual ion tails. The longer one extends for 2° in PA 298° and the other 30′ in PA 303°. Details: 11"/ 2.2 RASA and QHY600 camera. Michael Jaeger Amateur astronomers have done it again — discovered a comet. Not by looking through a telescope but through close study of  publicly released, low-resolution images  taken by the  Solar Wind Anisotropies  (SWAN) camera on the orbiting  Solar and Heliospheric Observatory  (SOHO). On March 29th, Vladimir Bezugly of Ukraine was the first to report a moving object in SWAN photos taken the week prior. Michael Mattiazzo of Victoria, Australia, independently found "a pretty obvious comet" the same day using the same images, noting that the object was about 11th magnitude and appeared to be brightening. R...
Post a Comment
Read more

Why did Homo sapiens outlast all other human species?

  From - Live Science By  Mindy Weisberger Edited by - Amal Udawatta Reproductions of skulls from a Neanderthal (left), Homo sapiens (middle) and Australopithecus afarensis (right)   (Image credit: WHPics, Paul Campbell, and Attie Gerber via Getty Images; collage by Marilyn Perkins) Modern humans ( Homo sapiens ) are the sole surviving representatives of the  human family tree , but we're the last sentence in an evolutionary story that began approximately 6 million years ago and spawned at least 18 species known collectively as hominins.  There were at least nine  Homo  species — including  H. sapiens  —  distributed around Africa, Europe and Asia by about 300,000 years ago, according to the Smithsonian's  National Museum of Nat ural History  in Washington, D.C. One by one, all except  H. sapiens  disappeared.  Neanderthals  and a  Homo  group known as the  Denisovans  lived alongside...
Post a Comment
Read more

Who Was the Real Marilyn Monroe?

  From - Smithsonian Magazine, By -  Grant Wong Historian, University of South Carolina, Edited by - Vinuri Randhula  Silva, “Blonde,” a heavily fictionalized film by Andrew Dominik, explores the star’s life and legend in a narrative that’s equal parts glamorous and disturbing Marilyn Monroe’s  final interview  is a heartbreaker. Published in  Life  magazine on August 3, 1962—just a day before the  actress died  of a barbiturate overdose at age 36—it found Monroe reflecting on her celebrity status, alternatively thoughtful, frank and witty. “When you’re famous you kind of run into human nature in a raw kind of way,” she observed. “It stirs up envy, fame does. People you run into feel that, well, who is she—who is she, who does she think she is, Marilyn Monroe?” That same question—who was the real Monroe?—has sparked debate among  cinema scholars ,  cultural critics ,  historians ,  novelists ,  filmmakers  and th...
Post a Comment
Read more