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Ask a Caltech Expert: Physicists Explain Quantum Gravity

As part of Conversations on the Quantum World, a webinar series hosted by the Caltech Science Exchange, Professor of Theoretical Physics Kathryn Zurek and Professor of Physics Rana Adhikari talk about one of the biggest mysteries in physics today: quantum gravity.

Quantum gravity refers to a set of theories attempting to unify the microscopic world of quantum physics with the macroscopic world of gravity and space itself. Zurek, a theorist, and Adhikari, an experimentalist, have teamed up with others to design a new tabletop-size experiment with the potential to detect signatures of quantum gravity.

In conversation with Caltech science writer Whitney Clavin, the scientists explain that at the microscopic, or quantum, level, matter, and energy are made up of discrete components; in other words, quantized. Many scientists believe that gravity is also quantized: if you magnify space itself enough, you should see discrete components. In this webinar, Zurek and Adhikari discuss why measuring quantum gravity is so difficult and how they plan to go about searching for its elusive signatures.

With historic explosion, a long sought fusion breakthrough

More energy out than in. For 7 decades, fusion scientists have chased this elusive goal, known as energy gain. At 1 a.m. on 5 December, researchers at the National Ignition Facility (NIF) in California finally did it, focusing 2.05 megajoules of laser light onto a tiny capsule of fusion fuel and sparking an explosion that produced 3.15 MJ of energy—the equivalent of about three sticks of dynamite.

“This is extremely exciting, it’s a major breakthrough,” says Anne White, a plasma physicist at the Massachusetts Institute of Technology, who was not involved in the work.

Mark Herrmann, who leads NIF as the program director for weapons physics and design at Lawrence Livermore National Laboratory, says it feels “wonderful,” adding: “I’m so proud of the team.”

Breakthrough in Lithium-air Batteries Could Help Put More Electric Vehicles On The Road

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Illinois Institute of Technology Assistant Professor of Chemical Engineering Mohammad Asadi has developed solutions to two major problems facing lithium-air batteries. Lithium-air batteries hold more energy in a smaller battery size than their more common counterpart, the lithium-ion battery, but until now, lithium-air batteries have been overlooked in commercial applications because lithium-air batteries tended to die after fewer recharges and require a lot more energy to charge than can be generated by the battery later.

After almost a decade working in the oil and gas industry, Asadi turned his focus to carbon dioxide in the atmosphere, particularly caused by the transportation industry, which consumes around 38 to 40 percent of the world’s energy. “With more widespread use of electric vehicles, you can drastically reduce transportation-based carbon emissions,” says Asadi. “But to put more electric vehicles on the road, we’ll need batteries—lots of them.”

Currently, lithium-air batteries are seen as less commercially viable than their counterpart, the lithium-ion battery. However, using lithium-air batteries in electric vehicles has some huge advantages.

Lost Roman Map has ATLANTIS at Eye of Sahara Africa! (Richat Structure)

This video gives an interesting theory as to where the lost city of Atlantis was (a location known today as the Eye of the Sahara), and it seems to be a pretty reasonable conjecture. What is relevant to this group however is how it might have been destroyed by a tsunami caused by a massive landslide in the Mediterranean — which is especially notable because the location is a great distance away from the Mediterranean, yet the evidence points to such a tsunami flooding a path all the way across Africa to the Atlantic, regardless of whether the city of Atlantis was in that path.

I think of our interconnected world today and wonder what would happen if such an unexpected event were to happen now, targeting a region that was in some way or another vital to modern civilization (such as with a concentration of all talent in an important field) without any suitable alternatives available.

This is one reason why I think it is dangerous to rely on trade networks that stretch to the opposite side of the earth for vital sectors such as food or energy.


Astonishing *NEW* details have been uncovered involving the Lost Ancient City of Atlantis, and the Eye of The Sahara. These details are so significant that the Richat Structure should without a doubt, be considered the most likely location of the lost capital city of Atlantis.

JOIN ME LIVE IN ASHEVILE Next June with Graham Hancock & Randall Carlson! https://cosmicsummit2023.com/

Flux Capacitors and the Origin of Inertia

The explanation of inertia based on “Mach’s principle” is briefly revisited and an experiment whereby the gravitational origin of inertia can be tested is described. The test consists of detecting a small stationary force with a sensitive force sensor. The force is presumably induced when a periodic transient Mach effect mass fluctuation is driven in high voltage, high energy density capacitors that are subjected to 50 kHz, 1.3 kV amplitude voltage signal, and threaded by an alternating magnetic flux of the same frequency. An effect of the sort predicted is shown to be present in the device tested. It has the expected magnitude and depends on the relative phase of the Mach effect mass fluctuation and the alternating magnetic flux as expected. The observed effect also displays scaling behaviors that are unique to Mach effects.

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