Physics

News

Human brain cancer cells forming spherical structures on the DN gel
29 Mar 2021
A hydrogel, a type of soft matter, developed at Hokkaido University successfully reverted cancer cells back to cancer stem cells within 24 hours, in six different human cancer types. This could lead to the development of anti-cancer stem cell drugs and personalized medicines.
29 Mar 2021
A paper by the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU) Director Ooguri Hirosi and Project Researcher Matthew Dodelson on the string theoretical effects outside the black hole photon sphere has been selected for the “Editors’ Suggestion” of the journal Physical Review D. Their paper was published on March 24, 2021.
The optical forces acting on a moving nanodiamond
26 Mar 2021
Scientists have developed a method to use lasers to control the movement of nanodiamonds with fluorescent centers.
17 Mar 2021
Researchers improve their newly established quantum algorithm, bringing it to one-tenth the computational cost of Quantum Phase Estimation, and use it to directly calculate the vertical ionization energies of light atoms and molecules such as CO, O2, CN, F2, H2O, NH3 within 0.1 electron volts of precision.
08 Mar 2021
Researchers at Kanazawa University report in Biosensors and Bioelectronics a successful test of a sensor for measuring hydrogen peroxide concentrations near cell membranes. The sensor has the potential to become a tool for new cancer therapies.
08 Mar 2021
What is the origin of black holes and how is that question connected with another mystery, the nature of dark matter? Dark matter comprises the majority of matter in the Universe, but its nature remains unknown.
Feedback compensation tests whether measurement results fit their physical reality
16 Feb 2021
Holger F. Hofmann, professor in the Graduate School of Advanced Science and Engineering, Hiroshima University, published a method to experimentally demonstrate the precision of quantum measurements on Feb. 3 in Physical Review Research. His work has implications for our fundamental understanding of physics at the level of individual quantum objects.
10 Feb 2021
Researchers at The University of Tokyo discover a new law about how the complex network of phase-separated structures grows with time, which may lead to more efficient batteries and industrial catalysts
18 Jan 2021
Researchers at Osaka City University use quantum superposition states and Bayesian inference to create a quantum algorithm, easily executable on quantum computers, that accurately and directly calculates energy differences between the electronic ground and excited spin states of molecular systems in polynomial time.
elasticity in microfabricated diamond
08 Jan 2021
Diamond is the hardest material in nature. But out of many expectations, it also has great potential as an excellent electronic material. A joint research team led by City University of Hong Kong (CityU) has demonstrated for the first time the large, uniform tensile elastic straining of microfabricated diamond arrays through the nanomechanical approach. Their findings have shown the potential of strained diamonds as prime candidates for advanced functional devices in microelectronics, photonics, and quantum information technologies.
28 Dec 2020
Kanazawa University’s pioneering high-speed atomic force microscope technology has now shed light on the structure and dynamics of some of life’s most ubiquitous and inscrutable molecules – intrinsically disordered proteins. The study is reported in Nature Nanotechnology.
23 Dec 2020
Osaka City University scientists have developed mathematical formulas to describe the current and fluctuations of strongly correlated electrons in quantum dots. Their theoretical predictions could soon be tested experimentally.
BioAFMviewer
22 Dec 2020
Atomic force microscopy (AFM) allows to obtain images and movies showing proteins at work, however with limited resolution. The developed BioAFMviewer software opens the opportunity to use the enormous amount of available high-resolution protein data to better understand experiments. Within an interactive interface with rich functionality, the BioAFMviewer computationally emulates tip-scanning of any biomolecular structure to generate simulated AFM graphics and movies. They greatly help in the interpretation of e.g., high-speed AFM observations.
21 Dec 2020
In the 1970s, physicists uncovered a problem with the Standard Model of particle physics—the theory that describes three of the four fundamental forces of nature (electromagnetic, weak, and strong interactions; the fourth is gravity). They found that, while the theory predicts that a symmetry between particles and forces in our Universe and a mirror version should be broken, the experiments say otherwise. This mismatch between theory and observations is dubbed “the Strong CP problem”—CP stands for Charge+Parity. What is the CP problem, and why has it puzzled scientists for almost half a century?
02 Dec 2020
Yuto Minami at KEK and Eiichiro Komatsu at Kavli IPMU developed a new method to calibrate detectors to the light from dust in our Galaxy, thereby describing a new physics, with 99.2 percent accuracy, that may show parity symmetry breaking.
02 Dec 2020
A research team led by Kavli IPMU graduate student Hiroki Yoneda has shed new night on the massive star and its neutron star companion, which are thought to be at the core of the gamma-ray binary system LS 5039.
02 Dec 2020
A research team including Kavli IPMU Principal Investigator Naoki Yoshida has, in a world first, succeeded in performing a 6-dimensional simulation of neutrinos moving through the universe.
25 Nov 2020
Materials that convert mechanical into electrical or magnetic energy could open the door to a future of wearable and structure-integrated virus sensors.
19 Nov 2020
A research team, affiliated with South Korea's Ulsan National Institute of Science and Technology (UNIST) has discovered that when the rotational quantum states of non-polar molecules change under the influence of laser fields (non-resonant laser fields), so does their motion trajectories.
13 Nov 2020
How hot is the Universe today? How hot was it before? A new study by an international team of researchers, including members of the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), suggests that the mean temperature of gas in large structures of the Universe has increased about 3 times in the last 8 billion years, to reach about two million Kelvin today.
Schematic diagram of this study
30 Oct 2020
A research team based in Japan may be moving toward a more controlled walk by unveiling the mechanism underlying the directional decision of each quantum step and introducing a way to potentially control the direction of movement.
The anomalies and criticality of liquid water
29 Oct 2020
Scientists at The University of Tokyo use a two-state model based on the formation of tetrahedral structures to explain water’s anomalous properties and the surprising liquid–liquid transition of water.
29 Oct 2020
Tohoku University researchers have revealed more details about omnidirectional photoluminescence (ODPL) spectroscopy - a method for probing semiconducting crystals with light to detect defects and impurities.
Image_iCeMS_Kamei_OpticsLetters
03 Oct 2020
A new apparatus improves how we study the effects of aiming high-field terahertz radiation at cells, with implications for regenerative medicine.
16 Sep 2020
Professor Hyeon K. Park, affiliated with South Korea's Ulsan National Institute of Science and Technology (UNIST) has been selected, as the 7th Laureate of S. Chandrasekhar Prize of Plasma Physics.
11 Sep 2020
Measuring the temperature of objects at a nanometer-scale has been a long challenge, especially in living biological samples, because of the lack of precise and reliable nanothermometers. An international team of researchers has realized a quantum technology to probe temperature on a nanometer-scale, and have observed a ‘fever’ in tiny nematode worms under pharmacological treatment. This strengthens the connection between quantum sensing and biology and ushers in novel thermal imaging technologies in biomedical research.
City University of Hong Kong, CityU, CityUResearch
11 Aug 2020
In the era of smart cities and amid the global outbreak of Covid-19, connecting through the internet is getting more important than ever. Researchers have been working day and night on advancing the optical data transmission network to address the demand for faster transmission speed. An international research team has developed a new technology that is equipped with a special chip made by a scientist from City University of Hong Kong (CityU). The team broke the spectral efficiency world record for optical data transmission with a single integrated photonic chip. This allows the transmission speed as fast as downloading 1,000 high-definition movies in less than a second!
City University of Hong Kong, CityU, CityUResearch
06 Aug 2020
Understanding the microscopic origin of different physical properties of solids is of fundamental importance for condensed-matter physics and for materials applications. Yet, there is still a lot of unknowns in amorphous materials due to their disordered atomic structure. Recently, with the state-of-the-art neutron scattering instrumentation and molecular dynamic simulations, an international research team, led by physicists from City University of Hong Kong (CityU), has demonstrated the existence of high-frequency transverse phonons in metallic glass for the first time. Their findings also suggest that the atomic structure correlates with its atomic dynamics, providing new insight for understanding the atomic structure-dynamics relationship in disordered materials.
05 Aug 2020
Research at Kanazawa University as reported in Scientific Reports demonstrates atomic force microscopy imaging that gets around the challenges of exciting very small cantilevers at their high megahertz resonance frequencies. The approach accomadates wide frequency bandwiths, and is applicable for photosensitive materials in a wide range of liquids.

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