Physics


- Electrical engineers from the UCLA Samueli School of Engineering have developed a more efficient way of converting light from one wavelength to another, opening the door for improvements in the performance of imaging, sensing, and communication systems. Mona Jarrahi, professor of electrical and computer engineering at UCLA Samueli, led the Nature Communications -published research. Finding an efficient way to convert wavelengths of light is crucial to the improvement of many imaging and sensing ... [Read More]


- Particle accelerators are hugely important in the study of the matter of the Universe, but the ones we think of tend to be gigantic instruments – surrounding cities in some cases. Now scientists have made a much smaller version to power an advanced laser, a setup that could be just as useful as its larger counterparts. The particle accelerator in question is a plasma wakefield accelerator , which generates short and intense bursts of electrons, and the laser it's powering is what's known as a ... [Read More]


- Occurring faster than the speed of sound, the mystery behind the breakdown of plasma discharges in water is one step closer to being understood as researchers pursue applying new diagnostic processes using state-of-the-art X-ray imaging to the challenging subject. Occurring faster than the speed of sound, the mystery behind the breakdown of plasma discharges in water is one step closer to being understood as researchers pursue applying new diagnostic processes using state-of-the-art X-ray ... [Read More]


- Led by Justus Ndukaife, assistant professor of electrical engineering, Vanderbilt researchers are the first to introduce an approach for trapping and moving a nanomaterial known as a single colloidal nanodiamond with nitrogen-vacancy center using low power laser beam. The width of a single human hair is approximately 90,000 nanometers; nanodiamonds are less than 100 nanometers. These carbon-based materials are one of the few that can release the basic unit of all light—a single photon—a ... [Read More]


- Physicists at CERN have discovered an exotic new particle that’s quite charming. Known as T cc + , the particle belongs to a rare class called tetraquarks, and its unusual composition makes it the longest-lived exotic hadron found so far. Matter is made up of fundamental particles called quarks, which come in six “flavors”: up, down, strange, charm, top and bottom. These quarks group together in different ways to make up different types of matter – baryons like protons and neutrons are ... [Read More]

Source: newatlas.com

- CD-1 milestone marks start of project execution phase for next-generation nuclear physics facility that will probe the smallest building blocks of visible matter. The U.S. Department of Energy (DOE) has granted Critical Decision 1 (CD-1) for the Electron-Ion Collider (EIC), a one-of-a-kind nuclear physics research facility to be built at DOE’s Brookhaven National Laboratory on Long Island. Following DOE’s approval of "mission need" (known as CD-0) in December 2019, this announcement marks ... [Read More]


- Researchers have detected the rolling movement of a nano-acoustic wave predicted by the famous physicist and Nobel prize winner Lord Rayleigh in 1885. This phenomenon can find applications in acoustic quantum technologies or in so-called "phononic" components, which are used to control the propagation of acoustic waves. The study, published in the journal Science Advances , was conducted by researchers from Purdue University, the University of Augsburg, the University of Münster and the ... [Read More]

Source: phys.org

- Scientists studying particle collisions have produced definitive evidence for two physics phenomena predicted more than 80 years ago: that matter/antimatter can be created directly by colliding photons and that a magnetic field can bend polarized light along different paths in a vacuum. Scientists studying particle collisions at the Relativistic Heavy Ion Collider (RHIC) -- a U.S. Department of Energy Office of Science user facility for nuclear physics research at DOE's Brookhaven National ... [Read More]


- Scientists from the Faculty of Physics of the University of Warsaw have demonstrated exciton-polariton lasing and parametric scattering of exciton-polaritons in a system of coupled optical microcavities. The results have been published in the prestigious journal Nanophotonics . Exciton-polaritons are quasiparticles formed by a strong coupling between excitons and photons in a semiconductor. Their bosonic nature and non-linear interactions allow the observation of fascinating phenomena such as ... [Read More]

Source: phys.org

- Researchers used some of Europe's strongest continuous magnetic fields to uncover evidence of exotic charge carriers in the metallic state of copper-oxide high-temperature superconductors (high-Tc cuprates). The team postulated that it is these exotic charge carriers that form the superconducting pairs, in marked contrast with expectations from conventional theory. Researchers used some of Europe's strongest continuous magnetic fields to uncover evidence of exotic charge carriers in the ... [Read More]


- When molecules are excited, they can give rise to a variety of energy conversion phenomena, such as light emission and photoelectric or photochemical conversion. To unlock new energy conversion functions in organic materials, researchers should be able to understand the nature of a material's excited state and control it. So far, many scientists have used spectroscopy techniques based on laser light in research focusing on excited states. Nonetheless, they were unable to use laser light to ... [Read More]

Source: phys.org

- Cornell researchers have developed nanostructures that enable record-breaking conversion of laser pulses into high-harmonic generation, paving the way for new scientific tools for high-resolution imaging and studying physical processes that occur at the scale of an attosecond – one quintillionth of a second. High-harmonic generation has long been used to merge photons from a pulsing laser into one, ultrashort photon with much higher energy, producing extreme ultraviolet light and X-rays used ... [Read More]


- Researchers have demonstrated a low-cost technique for retrieving nanowires from electronic devices that have reached the end of their utility and then using those nanowires in new devices. The work is a step toward more sustainable electronics. Researchers at North Carolina State University demonstrated a low-cost technique for retrieving nanowires from electronic devices that have reached the end of their utility and then using those nanowires in new devices. The work is a step toward more ... [Read More]


- PsiQuantum Inc. today said that it has nabbed a $450 million late-stage funding round led by investment firm BlackRock Inc. to finance its efforts to build a reliable quantum computer with more than a million qubits. Qubits are the quantum equivalent of the bits in regular computers. What sets a qubit apart is that it can perform two calculations at the same time, that is instantly. As more qubits are added to a quantum computer, the number of computations that the system can perform instantly ... [Read More]


- A newly developed method of levitating and manipulating tiny objects using sound waves could represent a major step forward for the technology. Engineers in Japan have figured out how to pick up objects from reflective surfaces using acoustic levitation. Although they can't yet do so reliably, the advance could help unlock the full potential of the manipulation of physical objects using nothing but sound. Biomedical engineering, nanotechnology and the development of pharmaceuticals are some of ... [Read More]


- The ATLAS Collaboration at CERN announces the first observation of "WWW production": The simultaneous creation of three massive W bosons in high-energy Large Hadron Collider (LHC) collisions. As a carrier particle of the electroweak force, the W boson plays a crucial role in the Standard Model of particle physics. Though discovered nearly four decades ago, the W boson continues to provide physicists with new avenues for exploration. In particular, its study has allowed scientists to test the ... [Read More]

Source: phys.org