Quantum information protocols are based on a variety of entanglement modes such as Einstein-Podolsky-Rosen (EPR), Greenberger-Horne-Zeilinger (GHZ) and other cluster states. For on-demand preparation, these states can be realized with squeezed light sources in optics, but such experiments lack versatility as they require a variety of optical circuits to individually realize diverse states of entanglement. In a recent study, Shuntaro Takeda…
Tag: experiments
Clocks, gravity and the limits of relativity
A hundred years ago today, Einstein’s theory of gravity was first put to the test when Arthur Eddington observed light “bending” around the sun during a solar eclipse. A century later, scientists are still searching for the limits of the theory. Source: https://earthsky.org/space/clocks-gravity-limits-of-relativity…
Google Revives Controversial Cold-Fusion Experiments
According to a peer-reviewed paper revealed this week, Google is continuing its experiments into the controversial science of cold fusion — the theory that nuclear fusion, the process that powers the Sun, can produce energy in a table-top experiment at room temperature. While Google’s recent project found no evidence that cold fusion is possible, it did make some advances in measurement…
Getting ready for Mars on the Space Station
From disrupted biological clocks to radiation and contamination hazards, Europe is running experiments on the International Space Station to take human exploration one step closer to Mars. Source: https://phys.org/news/2019-05-ready-mars-space-station.html…
Watch ISS spacewalk May 29
Watch 2 Russian cosmonauts perform a spacewalk outside the International Space Station (ISS) on Wednesday, May 29. Source: https://earthsky.org/space/watch-iss-russian-astronauts-spacewalk-may29-2019…
‘Phenomenal’ 2,300-Year-Old Bark Shield Found In Leicestershire
pgmrdlm shares a report from The Guardian: An “astonishing and unparalleled” 2,300-year-old shield made of tree bark has been discovered in Leicestershire, the only example of its kind ever found in Europe. The shield was discovered in 2015 by archaeologists from the University of Leicester Archaeological Service in a site close to the River Soar. Organic objects from the period very…
Q&A with Shwetabh Mittal, Head of Product and Corporate Strategy for Coursera for Business
We recently sat down with Shwetabh Mittal, the head of product and corporate strategy for Coursera for Business. Shwetabh was excited to provide a peak into how our product roadmap is developed and share some of the most exciting upcoming new features. In particular, he shares how he’s thinking about skills-based features in the wake […]
The post Q&A with Shwetabh Mittal,…
Video: 100 years of gravity
One hundred years ago this month, observations performed during a total solar eclipse proved for the first time the gravitational bending of light predicted by Albert Einstein’s new theory of gravity, general relativity. In this video, Günther Hasinger, ESA Director of Science, reflects on this historic measurement that inaugurated a century of exciting experiments, investigating gravity on Earth and in space…
The geometry of an electron determined for the first time
Physicists at the University of Basel have shown for the first time how a single electron looks in an artificial atom. A newly developed method enables them to show the probability of an electron being present in a space. This allows improved control of electron spins, which could serve as the smallest information unit in a future quantum computer. The experiments…
Zombie Science: Could We Ever Resurrect the Dead?
Zombies aren’t real. Death is permanent. Some scientists seem to have ignored those facts. Source: https://www.livescience.com/65542-zombies-real-resurrection-experiments.html