Year 2021 face_with_colon_three
By exploiting polarization entanglement between photons, quantum holography can circumvent the need for first-order coherence that is vital to classical holography.
Category: quantum physics – Page 361
John F. Clauser reflects on receiving the 2022 Nobel Prize in physics for the groundbreaking work he did 50 years ago.
Today’s stories include Why a Puzzling New Image Of Jupiter Could Help Us Find Life Beyond Earth to Scientists Test Einstein’s Relativity On A Cosmological Scale…
One of the most enduring human mysteries is why we possess sentient awareness, a paradox known to science as the “hard problem of consciousness.”
At the physiological level, we have a good understanding that consciousness is driven by electrical impulses and chemical signals between neurons in the brain. Though precisely what regions of the brain are responsible for thoughtful experience is still a matter of debate.
However, scientists still do not understand why the same essential elements of the universe can come together to form an inanimate object like a rock or a highly complex organic structure like the human brain.
With the reveal of its 433 qubit quantum computer, IBM takes a large step forward in the race towards next-generation processing.
In initial tests, a simplified version of a popular superconducting qubit achieves high computation accuracies, making it attractive for future quantum computers.
Terahertz (THz) radiation is electromagnetic radiation ranging from frequencies of 0.1 THz to 10 THz, with wavelengths between 30μm and 3mm. Reliably detecting this radiation could have numerous valuable applications in security, product inspection, and quality control.
For instance, THz detectors could allow law enforcement agents to uncover potential weapons on humans or in luggage more reliably. It could also be used to monitor natural environments without damaging them or to assess the quality of food, cosmetics and other products.
Recent studies introduced several devices and solutions for detecting terahertz radiation. While a few of them achieved promising results, their performance in terms of sensitivity, speed, bandwidth and operating temperature is often limited. Researchers at Massachusetts Institute of Technology (MIT), University of Minnesota, and other institutes in the United States and South Korea recently developed a new camera that can reliably detect THz radiation at room temperature, while also characterizing its so-called polarization states. This camera, introduced in a paper published in Nature Nanotechnology, is based on widely available complementary metal-oxide-semiconductors (CMOS), enhanced using quantum dots (i.e., nm-sized semiconductor particles with advantageous optoelectronic properties).
Did you hear that #physicists simulated a baby #wormhole in a lab? Well, it’s even more true that #StringTheory and #ExtraDimensions were discovered in the ’60s. Think I’m joking? I’m not. To learn what’s true/false in the wormhole story, read this first.
The experiment could help to form a unified theory of quantum gravity.
Scientists have, for the first time ever, made light appear to move simultaneously forward and backward in time. The new method, achieved by an international group of scientists, could help create novel quantum computing techniques and give scientists a better understanding of quantum gravity, a report from LiveScience.
It was achieved thanks to a combination of two principles that form a part of the bizarre world of quantum mechanics.
What is a “quantum time flip”?
This research could potentially lead to a better understanding of the galaxy and its many mysteries.
It’s a cosmic riddle: How can galaxies remain together when all the matter we observe isn’t enough to keep them intact? Scientists believe an invisible force must beat play, something so mysterious they named it “dark matter” because of its lack of visibility.
This mysterious presence accounts for nearly three times more than what we can observe — a startling 27% of all existence! The mysterious dark matter is a profound mystery to scientists, its existence making up nearly one-third of the universe’s energy and mass yet remaining elusive due to its ability to avoid detection.
IStock / agsandrew.