If you push something, it will move in the direction of force applied. But if you push an object with negative mass, it will move against the direction of applied force. Creating a particle with negative mass seems practically impossible. But now physicists have developed a device that can create particles with negative mass.
The first-ever observation of cataclysmic collision of two ultra-dense neutron stars, which generated infinitesimal ripples in the fabric of space and time called gravitational waves, has been voted the biggest Scientific Breakthrough of the year 2017.
Physicists have proven the existence of new form of matter called excitonium, almost 50 years after it was first theorized. Upon studying non-doped crystals of the transition metal dichalcogenide titanium diselenide (1T-TiSe2), the researchers were able to observe the material and its precursor soft plasmon phase called the "smoking gun" that proves the existence of this rare, exotic material.
Lightning is one of the most incredible natural phenomenons and there’s a lot we don’t know about it. Now, a study at Kyoto University, Japan has found that lightning strikes can set off photonuclear reactions in the atmosphere, and the gamma rays - emitted in lightning - react with the air to produce radioisotopes and even positrons (or, anti-electrons) - the antimatter partner of electrons.
Stephen Hawking's doctoral thesis has been made publicly available online for the first time. The 119-page document submitted by then 24-year old Hawking is titled "Properties of an Expanding Universe", and covers several topics that have echoed through his career such as the origins of the universe, gravitational waves, and singularities.
Quantum computers are a tool of destruction, not creation, according to Alexander Lvovsky, Quantum Optics group leader at the Russian Quantum Center. All the sensitive data sent over the internet is encrypted in order to protect the privacy of the parties involved, but quantum computers can make modern cryptography obsolete.
Researchers at the Universities of York, Munich and Cardiff have discovered that all quantum particles exhibit a unique property known as ‘backflow,’ which gives them the ability to move in the opposite direction to the way in which they are being pushed.
A team of physicists from the University of Nebraska-Lincoln has created the brightest light ever produced on Earth that is one billion times brighter than the surface of the sun. To create this record-breaking light, the team fired an ultra high-intensity laser known as the DIOCLES laser at electrons suspended in helium. Their aim was to study how the laser’s photon scattered from each time it is struck.
A team of physicists at the Australian National University (ANU) have managed to stop light using a cloud of ultra-cold atoms. The experiment, reported in the Nature Physics, could be used to build a quantum logic gate - an important building block in the development of light-based quantum computer.