Scicomm
A quantum battery is a system that stores energy and whose working parts are quantum systems, such as atoms, ions, spins, superconducting circuits or quantum dots, so the processes of storing and extracting energy are governed by quantum mechanics. Imagine you have a row of toy boxes. Each box can
Scicomm
The nucleus of the thorium-229 isotope has a special property: it has an excited state that's incredibly close in energy to its ground state. The existence of such an isomer is remarkable because when nuclei normally get excited, they need enormous amounts of energy — hundreds of thousands or
Culture
One of the advertisements during the ongoing T20 cricket World Cup on Star Sports India has been for Sprite, the carbonated beverage from the Coca-Cola Company. In the ad, it's a hot day, two people are irritated by the heat and humidity, and they beat it by taking
Scicomm
On Monday night, I kid you not, I dreamt of the Birch and Swinnerton-Dyer conjecture. It was only by name, a fleeting mention in a heated conversation I was having with a friend. I'm not sure who spoke it or why. When I woke up, I looked it
Culture
The following post was motivated by this exchange (on X.com), which prompted me to write out my understanding of the Copenhagen interpretation of quantum mechanics and the part the Heisenberg cut plays in it. I haven’t gone into the variants of the interpretation that Maria Violaris brings up;
Analysis
From 'Cosmic dawn: the search for the primordial hydrogen signal', Physics World, November 18, 2025: The EDGES instrument is a dipole antenna, which resembles a ping-pong table with a gap in the middle. It is mounted on a large metal groundsheet, which is about 30 × 30 m. Its
Scicomm
The search for dark matter, the invisible ‘glue’ that holds galaxies together, has long focused solely on subatomic particles and this could be a mistake if a new study Physical Review D is to be believed. Its sole author, William DeRocco, a postdoctoral scholar at the Maryland Centre for Fundamental
Life notes
Someone asked me recently to name the thing I've been most grateful for in 2025. After giving it some thought, I realised it had to be the heat capacity of water. And not just for 2025. Tea is my warm beverage of choice, and my favourite version is
Scicomm
Once in a while, nature runs experiments that no human lab can match. Ultra-high-energy cosmic rays are a good example. Cosmic rays are fast, high energy particles from space that strike Earth’s atmosphere with energies far beyond what even the most powerful particle accelerators can routinely create. Most particles
Culture
You're probably using AI to write. Both ChatGPT and Google AI Studio prefer to construct their sentences in specific and characteristic ways and anyone who’s been a commissioning editor for at least a few years will find the signs of its influence hard to miss, even if
Scicomm
Once Isaac Newton showed that a single gravitational law plus his rules of dynamics could reproduce the orbits of planets that Johannes Kepler had predicted, explain tides on Earth, and predict that a comet that had passed by once would return again, physicists considered Newtonian mechanics and gravitation to have
Scicomm
Consider a bunch of molecules that have been trapped between two mirrors facing each other very closely. In this 'box' the light can't move around freely; it can only exist in certain fixed patterns, somewhat like sound inside a finely tuned musical instrument. Even when all