Menu

Blog

Archive for the ‘particle physics’ category: Page 337

Jan 12, 2017

Semiconductor nanopyramids for building high-yield quantum photonic devices

Posted by in categories: computing, particle physics, quantum physics

Novel structures exhibit highly directional emission and provide a template for site-controlled quantum dots and self-aligned nanophotonic cavities.

Semiconductor quantum dots (QDs) are thought to be a promising candidate for a single-quantum emitter in on-chip systems because of their well-developed growth and fabrication techniques. Semiconductor QDs, however, have a number of inherent limitations that need to be overcome before they can be used in practical applications. For example, QDs in semiconductors are strongly affected by elements (e.g., phonons) in the surrounding environment, which results in short nonradiative decay times and rapid dephasing processes. Despite the high intrinsic radiative decay rates of semiconductor QDs compared with those of other single-quantum emitters (such as atoms and ions), the radiative decay rate needs to be further increased so that these fast nonradiative and dephasing processes can be overcome. Furthermore, the collection efficiency of the light that is emitted from conventional QDs embedded in a high-index planar substrate is typically low (about 4%).

Continue reading “Semiconductor nanopyramids for building high-yield quantum photonic devices” »

Jan 12, 2017

Was Einstein Right, Is Time Travel Possible? Scientists Tested it

Posted by in categories: particle physics, quantum physics, time travel

The University of Queensland Australia has done subsequent studies on time travel, its possibility aspects, and components. According to in-depth studies from the University, time travel is a possibility. The scientists used single particles of light photons to simulate quantum particles that travel through time. The study indicated that modern physics has strange aspects that were explained by Professor Timothy Ralph. Quantum particles are made up of fuzzy or uncertain components that make it possible for them to wiggle around and thus avoid inconsistent time travel situations. Therefore, nature behaves differently making the impossible possible.

Read more

Jan 11, 2017

Confirmed: We Really are ‘Star Stuff’

Posted by in categories: biotech/medical, particle physics, space

Scientist Carl Sagan said many times that “we are star stuff,” from the nitrogen in our DNA, the calcium in our teeth, and the iron in our blood.

It is well known that most of the essential elements of life are truly made in the stars. Called the “CHNOPS elements” – carbon, hydrogen, nitrogen, oxygen, phosphorous, and sulfur – these are the building blocks of all life on Earth. Astronomers have now measured of all of the CHNOPS elements in 150,000 stars across the Milky Way, the first time such a large number of stars have been analyzed for these elements.

“For the first time, we can now study the distribution of elements across our Galaxy,” says Sten Hasselquist of New Mexico State University. “The elements we measure include the atoms that make up 97% of the mass of the human body.”

Read more

Jan 10, 2017

2D materials enhance a 3D world

Posted by in categories: particle physics, solar power, sustainability

In the past decade, two-dimensional, 2D, materials have captured the fascination of a steadily increasing number of scientists. These materials, whose defining feature is having a thickness of only one to very few atoms, can be made of a variety of different elements or combinations thereof. Scientists’ enchantment with 2D materials began with Andre Geim and Konstantin Novoselov’s Nobel Prize winning experiment: creating a 2D material using a lump of graphite and common adhesive tape. This ingeniously simple experiment yielded an incredible material: graphene. This ultra-light material is roughly 200 times stronger than steel and is a superb conductor. Once scientists discovered that graphene had more impressive properties than its bulk component graphite, they decided to investigate other 2D materials to see if this was a universal property.

Christopher Petoukhoff, a Rutgers University graduate student working in the Femtosecond Spectroscopy Unit at the Okinawa Institute of Science and Technology Graduate University (OIST), studies a 2D material, made of molybdenum disulfide (MoS2). His research focuses on the 2D material’s optoelectronic applications, or how the material can detect and absorb light. Optoelectronics are ubiquitous in today’s world, from the photodetectors in automatic doors and hand dryers, to solar cells, to LED lights, but as anyone who has stood in front of an automatic sink desperately waving their hands around to get it to work will tell you, there is plenty of room for improvement. The 2D MoS2 is particularly interesting for use in photodetectors because of its capability of absorbing the same amount of light as 50nm of the currently used silicon-based technologies, while being 70 times thinner.

Petoukhoff, under the supervision of Professor Keshav Dani, seeks to improve optoelectronic devices by adding a 2D layer of MoS2 to an organic semiconductor, which has similar absorption strengths as MoS2. The theory behind using both materials is that the interaction between the MoS2 layer and the organic semiconductor should lead to efficient charge transfer. Petoukhoff’s research, published in ACS Nano, demonstrates for the first time that charge transfer between these two layers occurs at an ultra-fast timescale, on the order of less than 100 femtoseconds, or one tenth of one millionth of one millionth of a second.

Read more

Jan 10, 2017

New active filaments mimic biology to transport nano-cargo

Posted by in categories: biotech/medical, nanotechnology, particle physics, robotics/AI

Very interesting read. The researchers created a completely artificial microscopic transport system mimicking the human body. With this technology we’re going to be able to address many areas of healthcare as well as some areas of AI.


Inspired by micro-scale motions of nature, a group of researchers at the Indian Institute of Technology Madras and the Institute of Mathematical Sciences, in Chennai, India, has developed a new design for transporting colloidal particles, tiny cargo suspended in substances such as fluids or gels, more rapidly than is currently possible by diffusion.

Fluid friction determines micro-scale inertia in fluid. This means, for instance, blood cells swimming within blood encounter roughly the same amount of drag that a human would experience attempting to swim through molasses.

Continue reading “New active filaments mimic biology to transport nano-cargo” »

Jan 9, 2017

Brian Greene: Time Travel is Possible

Posted by in categories: particle physics, time travel

Is the time we experience in our day-to-day lives real? Here, theoretical physicist Brian Green explores the potential particles of time and why we could, in theory, travel forward in time but not back.

Read more

Jan 8, 2017

Astronomers Have Discovered an Insane Galactic Particle Accelerator, Fuelled by a Black Hole

Posted by in categories: cosmology, particle physics

An international team of astronomers have discovered a ‘cosmic one-two punch’ in the night sky that has never been seen before. In one image, the team managed to spot a supermassive black hole and two gigantic galaxy clusters colliding at the same time.

Matter ejected from the black hole gets caught up inside the violent galactic collisions, turning this dynamic duo into one hell of an enormous cosmic particle accelerator.

“We have seen each of these spectacular phenomena separately in many places,” said team leader Reinout van Weeren, from the Harvard-Smithsonian Centre for Astrophysics.

Continue reading “Astronomers Have Discovered an Insane Galactic Particle Accelerator, Fuelled by a Black Hole” »

Jan 5, 2017

Researchers Build FIRST Reprogrammable Quantum Computer!

Posted by in categories: computing, information science, particle physics, quantum physics

Nice advancement this week in QC.


Researchers may have finally created the first fully reprogrammable quantum computer in the world. This changes the entire spectrum of the technology, as quantum computers so far could only run one type of equation.

This marks the beginning of reprogrammable quantum computers. Several teams and companies like IBM are still in the race towards quantum computing, which so far can only run one type of equation. This seems ironic as they can theoretically run more operations than there are atoms in the universe. But this stops now.

Continue reading “Researchers Build FIRST Reprogrammable Quantum Computer!” »

Jan 4, 2017

Harnessing the Power of Siberia: Physicists Creating Matter-Antimatter Collider

Posted by in category: particle physics

Physicists engaged in the construction of a nuclotron-based ion collider (NICA) facility in Dubna, outside Moscow plan to combine efforts to create of a unique electron positron collider at Novosibirsk’s Budker Institute of Nuclear Physics. Promoters say the project would allow Russia to take the lead in a very promising niche of particle physics.

Budker Institute of Nuclear Physics Deputy Director Yevgeny Levichev discussed Russian physicists’ ambitious plans with Russia’s RIA Novosti news agency on Tuesday.

The Institute plans to create the Super Tau Charm Factory, a particle accelerator which would study the collision of beams of electrons (matter) and positrons (antimatter) in an effort to help to identify phenomena and processes beyond the Standard Model of particle physics.

Continue reading “Harnessing the Power of Siberia: Physicists Creating Matter-Antimatter Collider” »

Jan 3, 2017

Physicists May Have Just Discovered A New Form Of Light

Posted by in category: particle physics

In Brief Scientists from the Imperial College have discovered that light could possibly exist in a previously unknown form, as a mix with a single electron. This interaction creates light that has the properties of both particles.

For something that seems so integral to our lives, we are still discovering many things about light. Its most fundamental properties still astound us, and its interactions with other particles are full of surprises. Case in point, scientists from the Imperial College in London seem to have just discovered a new form of light, one made by combining light with a single electron particle.

Continue reading “Physicists May Have Just Discovered A New Form Of Light” »