Science Daily March 5, 2019 A typical resonator in an electronic device responds to one signal with one corresponding frequency. An international team of researchers (USA – Argonne National Laboratory, Michigan State University, Florida Institute of Technology, Israel, Sweden) has developed and demonstrated a nonlinear micromechanical resonator which vibrates with a spectrum consisting of multiple frequencies evenly spaced due to the nonlinear mode coupling, in spite of the fact that it is driven by a single frequency. The novel behavior results from a saddle node on an invariant circle (SNIC) bifurcation. The resonator is an ideal test bed to study […]
New shapes of laser beam ‘sneak’ through opaque media
Phys.org March 4, 2019 A team of researchers in the US (Yale University, Missouri University of Science & Technology) used a spatial light modulator (SLM) and a CCD camera to analyze an opaque material that is made of a layer of white paint, biological tissue, fog, paper, and milk. The SLM tailors the laser beam incident on the front surface of the material, and the CCD camera records the intensity profiles behind it. The resulting beam was more concentrated, with more light per volume inside and behind the opaque material. The method works for any opaque medium that does not […]
A New Layer of Medical Preparedness to Combat Emerging Infectious Disease
DARPA February 19, 2019 DARPA has selected five teams of researchers to support PREventing EMerging Pathogenic Threats (PREEMPT), a 3.5-year program first announced in January 2018 to reinforce traditional medical preparedness by containing viral infectious diseases in animal reservoirs and insect vectors before they can threaten humans. The PREEMPT researchers will model how viruses might evolve within animal populations and assess the safety and efficacy of potential interventions. According to the World Health Organization approximately 60 percent of emerging infectious diseases reported globally are zoonoses…read more.
Magnonic devices can replace electronics without much noise
Phys.org March 4, 2019 Researchers at UC Riverside created a chip that generated spin wave between transmitting and receiving antennae. They showed that the low-frequency noise of magnonic devices is dominated by the random telegraph signal noise rather than 1/f noise. It was also found that the noise level of surface magnons depends strongly on the power level, increasing sharply at the on-set of nonlinear dissipation. The presence of the random telegraph signal noise suggests that the current fluctuations involve random discrete macro events caused by an individual macro-scale fluctuator. The findings may help in developing the next generation of […]
Light pulses provide a new route to enhance superconductivity
Phys.org March 4, 2019 Under normal electron band theory, Mott insulators ought to conduct electricity, but they do not due to interactions among their electrons. An international team of researchers (Japan, Italy) used numerical methods to show that pulses of light could be used to turn these materials beyond simple conductors to superconductors due to an unconventional type of superconductivity known as “eta pairing” which is thought to involve repulsive interactions between certain electrons within the structure. The research provides new insights not only into the phenomenon of non-equilibrium dynamics but could lead to the development of new high-temperature superconductors…read […]
IBM Quantum Computer Roadmap
Next Big Future March 5, 2019 IBM has published a roadmap for improving quantum computers based on a “quantum volume” which is an architecture-neutral metric. It measures the useful amount of quantum computing done by a device in space and time. The results on the IBM Q System One indicate its performance is just over the threshold for 16. IBM roadmap is to double quantum volume every year. IBM wants to improve error rates 100 times from 1% to 0.01%. They plan to do this by increasing coherence times from 0.5 milliseconds to 1-5 milliseconds. The hope is to achieve quantum […]
Data transfer by controlled noise
Phys.org March 1, 2019 Researchers in Switzerland used double-slit experiment to show that correlations indicate how well one can predict, for instance, the oscillatory phase of one light wave if one knows the phase of the other wave. Even if both phases are noisy they can still do so in a more or less synchronized fashion. They have demonstrated that correlations exist between pairs of light waves, which means that the number of those correlations does not increase linearly with the number of light waves, but roughly quadratically. In principle, therefore, it should be possible to transmit six bits of […]
Concept of the laser can be reversed
Science Daily March 4, 2019 An international team of researchers (Austria, France) used microwave technology to build a random anti-laser and demonstrate its ability to absorb suitably engineered incoming radiation fields with near-perfect efficiency. They found that there is a complex scattering process in which the incident wave splits into many partial waves, which then overlap and interfere with each other in such a way that none of the partial waves can get out at the end. Potential uses of anti-laser technology could be to adjust a signal exactly the right way so that it is perfectly absorbed by the […]
Assembly in the air: Using sound to defy gravity
Phys.org March 4, 2019 Researchers at the University of Chicago levitated particles using sound to study how clusters are formed. They found that at a minimum six particles are needed to change between different shapes. By changing the ultrasound frequency, they could make the particle clusters move about and rearrange. This opens new possibilities for manipulating objects to form complex structures, develop new products and tools in the fields of wearable technology and soft robotics…read more. Open Access TECHNICAL ARTICLE
Top 10 Science and Technology Inventions for the Week of March 01, 2019
01. New program picks out targets in a crowd quickly and efficiently 02. Machines whisper our secrets 03. X-rays might be a better way to communicate in space 04. Signals from distant lightning could help secure electric substations 05. Magnetization reversal achieved at room temperature using only an electric field 06. Chilling New Research Shows How Dire a Smallpox Bioterror Attack Could 07. Entangling photons of different colors 08. Predicting the monsoon a year ahead 09. Causal disentanglement is the next frontier in AI 10. Superintelligence as a Service is Coming and It Can Be Safe AGI And others… Best […]