A new hypothesis called the “quantum memory matrix” could solve long-standing physics questions, including the Black Hole Information Paradox and dark matter.
Category: quantum physics – Page 206
AI uses too much energy—nanotech is the solution | Dr. Mark Hersam | TEDxChicago
Mark Hersam is a nanotechnologist who believes that understanding materials at the shortest of length scales can provide solutions to the world’s largest problems. Using an interdisciplinary approach at the intersection of neuroscience and nanoelectronics, Hersam presents a solution to the greatest societal threat posed by AI.
Dr. Mark C. Hersam, the Walter P. Murphy Professor of Materials Science and Engineering, Director of the Materials Research Center, and Chair of the Materials Science and Engineering Department at Northwestern University, has made major breakthroughs in the field of nanotechnology. His research interests include nanomaterials, additive manufacturing, nanoelectronics, scanning probe microscopy, renewable energy, and quantum information science. Dr. Hersam has received several honors including the Marshall Scholarship, Presidential Early Career Award for Scientists and Engineers, American Vacuum Society Medard Welch Award, U.S. Science Envoy, and MacArthur Fellowship. In addition, he is an elected member of the American Academy of Arts and Sciences, National Academy of Engineering, and National Academy of Inventors and has founded two companies, NanoIntegris and Volexion, which are suppliers of nanoelectronic and battery materials, respectively.
This talk was given at a TEDx event using the TED conference format but independently organized by a local community.
Scientists achieve teleportation between quantum computers for the first time ever
Until recently, practical attempts rarely pushed beyond proof-of-concept.
Now researchers have used the teleportation trick to forge a working logic gate between two separate quantum chips sitting about six feet apart, hinting at a future where clusters of modest processors act as one mighty computer.
A qubit is valuable because it can be zero and one at the same moment, yet that superposition collapses if the qubit feels a nudge from the outside world.
SpaceX launches UK satellite to create semiconductors in low Earth orbit — sub-zero temps and vacuum of space could advance AI data centers and quantum computing
In-space manufacturing is a relatively new field that seeks to utilize the unique characteristics of outer space and/or low-Earth orbit to achieve fabrication methods not possible on Earth. Space Forge’s primary goals are to produce semiconductors for data center, quantum, and military use cases, using “space-derived crystal seeds” to initiate semiconductor growth, utilizing unlimited vacuum and subzero temperatures for manufacturing, and then returning the chips to Earth for packaging.
The ForgeStar-1 satellite will not bring the cargo it manufactures back to Earth at the completion of its mission. Acting more as a proof-of-concept and prototype for a litany of technologies engineered by Space Forge, the satellite will be tasked with running through the successful application of key technologies for in-space manufacturing, and will end its mission with a spectacular fireball.
Space Forge plans to test both the best-case and worst-case scenarios for the satellite’s recovery. First, it will deploy its proprietary Pridwen heat shield and on-orbit controls to steer the satellite, and then test its failsafe mechanism, which involves disintegrating the craft in orbit.
“Time Breaks Down at Quantum Scale”: New Scientific Discovery Shocks Physicists and Redefines the Laws of the Universe
IN A NUTSHELL 🔍 Physicists in England discovered two opposing arrows of time in open quantum systems, challenging traditional views. 🌌 The study suggests time can move in both directions at the quantum level, revealing a symmetrical nature. ♻️ Entropy continues to increase in both directions of time, prompting a reevaluation of thermodynamic principles. 🧠.
Twisted trilayer graphene shows high kinetic inductance and quantum coherence
Superconductivity is an advantageous physical phenomenon observed in some materials, which entails an electrical resistance of zero below specific critical temperatures. This phenomenon is known to arise following the formation of so-called Cooper pairs (i.e., pairs of electrons).
There are two known types of superconductivity, known as conventional and unconventional superconductivity. In conventional superconductors, the formation of Cooper pairs is mediated by the interaction between electrons and phonons (i.e., vibrations in a crystal’s lattice), as explained by Bardeen-Cooper-Schrieffer (BCS) theory.
Unconventional superconductors, on the other hand, are materials that exhibit a superconductivity that is not prompted by electron–phonon interactions. While many past studies have tried to shed light on the mechanisms underpinning unconventional superconductivity, its underlying physics remains poorly understood.
Magnetic chains on superconductors: New heterostructure design advances quantum technology
Magnetic-superconducting hybrid systems are key to unlocking topological superconductivity, a state that could host Majorana modes with potential applications in fault-tolerant quantum computing. However, creating stable, controllable interfaces between magnetic and superconducting materials remains a challenge.
Traditional systems often struggle with lattice mismatches, complex interfacial interactions, and disorder, which can obscure the signatures of topological states or mimic them with trivial phenomena. Achieving precise control over magnetic structures at the atomic scale has been a long-standing challenge in this field.
Published in Materials Futures, the researchers developed a novel sub-monolayer CrTe2/NbSe2 heterostructure. By carefully depositing Cr and Te on NbSe2 substrate, they observed a two-stage growth process: an initial compressed Cr-Te layer forms with a lattice constant of 0.35 nm, followed by the formation of an atomically flat CrTe2 monolayer with a lattice constant of 0.39 nm. Annealing the Cr-Te layer can trigger stress-relief reconstruction, which creates stripe-like patterns with edges that host localized magnetic moments, effectively forming one-dimensional magnetic chains.
Researcher discusses trapping single atoms and putting them to work in emerging quantum technologies
Blink and you might miss it, but if you keep your eye on the monitors in professor Sebastian Will’s lab, you’ll catch a series of single-second flashes that light up the screen. Each flash is an atom of strontium, a naturally occurring alkaline-earth metal, being briefly captured and held in place by “tweezers” made of laser light. “We can see single atoms,” says graduate student Aaron Holman. “Seeing those never gets old.”
The lab saw its first atom at the end of 2022, after two years of constructing the experimental setup—a complicated and carefully calibrated series of atomic sources, vacuum chambers, magnets, electronics, and lasers that trap individual atoms and place them into custom arrangements—from scratch.
Holman, currently a 5th-year Ph.D. student in Physics, helped build the “TweeSr” project, as it’s referred to in the lab, from the ground up. A pure atomic, molecular, and optical (AMO) physicist at heart, he’s now working on ways to turn fundamental research on how atoms, molecules, and light interact into new technologies with collaborators at Columbia Engineering. He’s also heading toward bigger scales as part of a quantum network that is currently under construction.
