Phew! This is a lot of abstract words – so let’s take them step by step. Quantum phenomena are observations made in nature which can only be explained by effects of quantum mechanics. Generally speaking, quantum mechanics gives our nowadays best description of the fundamental processes in nature on very small length scales. This might sound very abstract, but actually a lot of modern technologies rely on quantum mechanical effects. The better and better understanding of quantum mechanics has led to innovations, like for example the satellite positioning (GPS), and it still holds big promises for the future. One prominent technological goal you may have seen in the media is to build a new type of computer which makes use of quantum mechanical effects – the so-called quantum computer. This is currently a very hot topic and already some other of our writings touched upon this. The focus of this text is more directed towards the fundamental aspects because there still exist many interesting open questions as well.
This is the second installment of our “What is…?” series.
During these months of quarantine, a lot of us have probably thought once or twice that we have been putting on some quarantine-weight. And while that is true (or not, for you, athletic reader) what is actually happening, is that you body is acquiring mass. A somewhat trivial difference, you may say, as weight is just the force inflicted by gravity on to some body. And it strikes me as a funny thing that in our everyday physics, everything comes intuitively to us, force, speed, acceleration, rotation stuff. Everything -but mass. It feels intuitive, but the more you think about it, the more you will end up asking yourself… What is mass?
– An overview of the recent developments in quantum computing –
Vienna, 12th of October, 2019:
Eliud Kipchoge became the first human to run a sub 2-hour marathon. Once believed to be unattainable, his time, 1:59:40, will not be officially recognized as a world record . The reason for this is that the experiment to run 26.2 miles in under two hours was conducted under specific conditions which are not comparable to standard racing situations. Having an electric car and a team of 41 world-class runners in front of him, setting the pace, he broke “the last barrier of modern athletics”. Or to put it in his own words: “Vienna is about running and breaking history, like the first man on the moon.” Continue reading “Is quantum advantage moving too fast for you to keep up?”
Pictorial Quantum Simulation: Atoms are sitting in a lattice built up by standing light waves, ready to be used for studying the most intriguing questions of state of the art research.
cOOKING UP A qUANTUM sIMULATION
Supercomputers are cornerstones of modern industry. They help to design complicated objects like aircraft, provide the handling of big data sets in AI, trade shares at stock exchanges and set the standards for today’s encryption. However, there exist highly complex problems involving the smallest building blocks of our world which cannot be solved on these supercomputers yet. Continue reading “Quantum Simulation Cookbook”
Transporting renewable energy to where it’s needed lies at the heart of the human endeavour to get rid of the need for fossil fuels. Superconductors can do so without loosing any of the precious electricity on the way, seemingly defying physical intuition. Find out in this article why many body physics is needed to understand their counter-intuitive behaviour, what role quantum entanglement plays and how quantum computation might lead to the discovery of materials which may give us the tools for a greener future.Continue reading “How quantum physics may save Earth from global warming”
I remember the first time I saw a magnifying glass. I was absolutely fascinated by such an object. It allowed me to see so much more than I could normally (even then, when I could actually see something without glasses or contacts). It was the most amazing thing I had seen until then. Well, what was an amazing discovery for me, had been around for ages in human history. Lenses and objects which resemble magnifying glasses date back four thousand years! But of course, our curiosity is boundless, we humans always need more. I quickly found myself wanting to see even deeper into this weird, amplified creatures. Fortunately, humans didn’t wait a lot to yearn for better resolutions.
How information can be teleported through the two most counter-intuitive properties of quantum mechanics.
We all know the quantum world is weird, but in no place does it become as weird as in the protocol allowing almost instant transportation of information from one place to the other termed “quantum teleportation”. That may sound like its impossible – but what if I tell you that this can even be done without the recipient of the information knowing? And that this technology is about to make communication absolutely eavesdrop-safe?
This post was written during the 27th installment of the Quark Matter conference held in Venice in May, 2018.
Today, in Venice, the sun does not shine, it roars. Yesterday, the city was completely soaked as a storm paraded through it, giving thunderous signals of its arrival. But today golden hues flood the air, contrasting with the shadows of the trees near the Palazzo del Casinó. The wind blows calmly and the smell of sea salt fills the air. Outside, the sea hums, the boats sail, and the tourists roam the streets of the islands in search of a taste of the past. I am sitting outside of the venue of the conference, drinking a coffee, admiring the day, and admiring the excruciatingly white buildings in front of me.
This post is a continuation of our last post on chaos. We therefore recommend you to read that one first, but it’s by no means necessary.
Time only moves forward – this is what we experience in our everyday lives. Often, people connect this to the fact that there are clearly processes in nature which cannot be undone: when you boil an egg you can not make the egg-white transparent again, your coffee is very unlikely to go back into the coffee powder, which will never become a full bean again itself.