The basic principle is reminiscent of the human brain, with its fireworks of neurotransmitters and ions that shoot back and forth between billions of nerve cells. “The human brain requires very little energy to achieve its enormous processing power. We want to create comparably efficient structures with atomic-scale technologies,” Leuthold explains. We aim to employ single atoms and molecules as switches and logic elements for novel concepts in information technology, based on single electron transfer, with ultimate scaling and low power consumption.
We also perform density functional theory calculations to elucidate the physical origins of the contrast observed. The calculations reveal that the Pauli repulsion is the source of the atomic resolution and yield insights into the important role of the tip functionalization . Astronomical and physical calculations suggest that the visible universe is only a tiny amount (4%) of what the universe is actually made of. A very large … Read More
Each pair of neighboring atoms oscillated like two masses linked by a spring, and this oscillation was synchronous across the entire illuminated region. To conserve energy during this process, a light of a new color is emitted, shifted toward the red of the spectrum. Standard chips are energy guzzlers compared to the single-atom optical switch. In an effort to circumvent this limitation, researchers are engineering metallic nano-antennas that concentrate light into a tiny volume to dramatically enhance any signal coming from the same nanoscale region. Nano-antennas are the backbone of nanoplasmonics, a field that is profoundly impacting biosensing, photochemistry, solar energy harvesting, and photonics.
In Basel, the group continues its research in the field of quantum optics and ultracold atoms. The unexpected findings raise new questions about the exact microscopic mechanisms by which a weak continuous green light can put some gold atoms into motion. “Answering them will be key … Read More
“I wanted to find answers to fundamental questions, and I wanted to know what holds the world together. Minimal electrical voltage is used to slip a single atom between a silver and a platinum pad, causing a digital signal to be emitted. To begin its work, the Centre of Atomic Scale Technologies is using initial Foundation funding to create 14 positions for PhD candidates and postdocs, and to purchase additional equipment to analyse and optimise nano-components. Hubble’s discovery was the first observational support for Georges Lemaître’s Big Bang theory of the universe, proposed in 1927. Lemaître proposed that the universe expanded explosively from an extremely dense and hot state, and continues to expand today. Subsequent calculations have dated this Big Bang to approximately 13.7 billion years ago.
More recently, atoms were used for the high-resolution imaging of static magnetic and electric fields near a chip surface . Our technique demonstrates … Read More
“We’ll need even smaller and more efficient chips in future, meaning a fundamentally new technology is necessary,” says Professor Jürg Leuthold, head of the Institute of Electromagnetic Fields at ETH Zurich. Chips that are 100 times smaller and 100 times more energy efficient—while at least retaining the current speed of data processing. From p2 we can reconstruct
In 1998 two teams of astronomers working independently at Berkeley, California observed that supernovae – exploding stars – were moving away from Earth at an accelerating rate. Physicists had assumed that matter in the universe would slow its rate of expansion; gravity would eventually cause the universe to fall back on its centre. Though the Big Bang theory cannot describe what the conditions were at the very beginning of the universe, it can help physicists describe the earliest moments after the start of the expansion. At CERN, we probe the fundamental structure of … Read More
It took 380,000 years for electrons to be trapped in orbits around nuclei, forming the first atoms. These were mainly helium and hydrogen, which are still by far the most abundant elements in the universe. Present observations suggest that the first stars formed from clouds of gas around 150–200 million years after the Big Bang. Heavier atoms such as carbon, oxygen and iron, have since been continuously produced in the hearts of stars and catapulted throughout the universe in spectacular stellar explosions called supernovae. He grew up in rural Toggenburg, in eastern Switzerland, where his father owned a textile factory in the Neckertal region. As a child, Leuthold paid close attention when the repairman serviced the machines, and he took over this task when he was a teenager.
One goal of these experiments is to realize hybrid quantum systems in which ultracold atoms and a solid-state system on the chip … Read More