Physics


Time Space Universe Space Time Quantum Past
- What is time? Why is it so different from space? And where did it come from? Scientists are still stumped by these questions — but working harder than ever to answer them. St. Augustine said of time, "If no one asks me, I know what it is. If I wish to explain to him who asks, I don't know." Time is an elusive concept: We all experience it, and yet, the challenge of defining it has tested philosophers and scientists for millennia.  It wasn't until Albert Einstein that we developed a ... [Read More]


Quantum Computers Quantum Computers Materials Argonne National Laboratory Giulia Galli
- Researchers have used quantum computers to simulate spin defects, an important material property for the next generation of quantum computers. Scientists achieve important milestone in making quantum computing more effective. Quantum computers promise to revolutionize science by enabling computations that were once thought impossible. But for quantum computers to become an everyday reality, there is a long way to go and many challenging tests to pass. One of the tests involves using quantum ... [Read More]


- A few of the deeper returning questions people engage with in conversations and discussions about cosmology relate to what happened before the big bang and what instigated the big bang in the first place; in other words, how does something come from nothing.  With these questions, we currently find ourselves at the edge of science, somewhere near the intersection of cosmology and philosophy.  In this article, professor Alastair Wilson shares his understanding of the matter and takes ... [Read More]


Quantum Information Quantum Computing Pulses Electrons Laser Cycle
- A laser pulse that sidesteps the inherent symmetry of light waves could manipulate quantum information, potentially bringing us closer to room temperature quantum computing. A laser pulse that sidesteps the inherent symmetry of light waves could manipulate quantum information, potentially bringing us closer to room temperature quantum computing. The study, led by researchers at the University of Regensburg and the University of Michigan, could also accelerate conventional computing. Quantum ... [Read More]


Isomers Isotopes Element Uranium Decay Neutrons
- Nobel laureate Otto Hahn is . Fission is one of the most important discoveries of the 20th century, yet Hahn considered something else to be his best scientific work . In 1921, he was studying radioactivity at the Kaiser Wilhelm Institute for Chemistry in Berlin, Germany, when he noticed something he could not explain. One of the elements he was working with wasn't behaving as it should have . Hahn had unknowingly discovered the first nuclear isomer, an atomic nucleus whose protons and neutrons ... [Read More]


Quantum Gate Researchers Gates Itoffoli Gate Aqt
- Researchers have demonstrated the first three-qubit high-fidelity iToffoli native gate in a superconducting quantum information processor and in a single step. This demonstration adds a novel easy-to-implement native three-qubit logic gate for universal quantum computing. High-fidelity quantum logic gates applied to quantum bits (qubits) are the basic building blocks of programmable quantum circuits. Researchers at the Advanced Quantum Testbed (AQT) at Lawrence Berkeley National Laboratory ... [Read More]


Terahertz Effect Radiation Quantum Photoexcitation Terahertz Technology Usable Photoelectric Effect
- Researchers have discovered in two-dimensional conductive systems a new effect that promises improved performance of terahertz detectors. A team of scientists at the Cavendish Laboratory, together with colleagues at the Universities of Augsburg (Germany) and Lancaster, has found a new physical effect when two-dimensional electron systems are exposed to terahertz waves . First of all, what are terahertz waves? "We communicate using mobile phones that transmit microwave radiation and use infrared ... [Read More]

Source: phys.org

Materials Structure Database Structures Princeton University Nicolas Regnault
- Topological Materials Are Everywhere – New Database Reveals Over 90,000 Searchable tool reveals more than 90,000 known materials with electronic properties that remain unperturbed in the face of disruption. What will it take for our electronics to become smarter, faster, and more resilient? One idea is to build them out of topological materials. Topology stems from a branch of mathematics that studies shapes that can be manipulated or deformed without losing certain essential properties. ... [Read More]


Number Channels Materials Junction Systems Energy
- Topological ideas have recently taken the center stage of modern electromagnetics. Typical topological photonic systems are based on nonreciprocal materials, a class of materials that enables asymmetric light–matter interactions. In particular, nonreciprocal platforms may support unidirectional channels that allow propagation in a given direction of space—let's say from left to right, but not the other way around. Such unidirectional guides are of key importance in optical systems ... [Read More]

Source: phys.org

Space Atom Bubbles Lab Atoms Earth
- Produced inside NASA 's Cold Atom Lab, the ultracold bubbles provide new opportunities to experiment with an exotic state of matter. Since the days of NASA's Apollo program, astronauts have documented (and contended with) how liquids like water behave differently in microgravity (see video below) than they do on Earth – coalescing into floating spheres instead of bottom-heavy droplets. Now, researchers have demonstrated this effect with a much more exotic material: gas cooled to nearly ... [Read More]


Energy Wave Function Quantum Box Photon
- By resolving a paradox about light in a box, researchers hope to clarify the concept of energy in quantum theory. The quantum physicists Sandu Popescu , Yakir Aharonov and Daniel Rohrlich have been troubled by the same scenario for three decades. It started when they wrote about a surprising wave phenomenon called superoscillation in 1990. "We were never able to really tell what exactly was bothering us," said Popescu, a professor at the University of Bristol. "Since then, every year we come ... [Read More]

Source: wired.com

Helium Antimatter Atoms Masaki Hori Matter Antiprotons
- A team of scientists at CERN led by MPQ physicist Masaki Hori discovered that a hybrid antimatter-matter atom behaves in an unexpected way when immersed in superfluid helium. The result may open a new way for antimatter to be used to investigate the properties of condensed matter, or to search for antimatter in cosmic rays. When peering into the shadowy world of antimatter, researchers have to rely on elaborate technical tricks to keep their samples of antimatter from coming into contact with ... [Read More]


Superconductivity Temperature Researchers Materials Fabio Boschini Charge
- Scientists have been relentlessly working on understanding the fundamental mechanisms at the base of high-temperature superconductivity with the ultimate goal to design and engineer new quantum materials superconducting close to room temperature. Scientists have been relentlessly working on understanding the fundamental mechanisms at the base of high-temperature superconductivity with the ultimate goal to design and engineer new quantum materials superconducting close to room temperature. High ... [Read More]


Nanoparticles Reactions Surface Laser Boris Bergues Prof Matthias Kling
- Physicists at the Max Planck Institute of Quantum Optics and Ludwig-Maximilians-Universität Munich in collaboration with Stanford University have for the first time used laser light to control the location of light-induced reactions on the surface of nanoparticles. Controlling strong electromagnetic fields on nanoparticles is the key to triggering targeted molecular reactions on their surfaces. Such control over strong fields is achieved via laser light. Although laser-induced formation ... [Read More]


States Symmetry Defects Frequency Disclination Zero Frequency
- An international research collaboration has discovered how to exploit certain defects to protect confined energy in acoustics systems. Their experimental approach provides a versatile platform to create at-will defects for further theoretical validation and to improve control of waves in other systems, such as light, according to principal investigator Yun Jing, associate professor of acoustics and of biomedical engineering at Penn State. The team published their results in Physical Review ... [Read More]

Source: phys.org