Targeting Individual Atoms

Targeting Individual Atoms

Our research combines experiment with theory, employing techniques of atomic physics, quantum optics and optomechanics. A common goal of our activities is to investigate quantum physics in systems of increasing size and complexity. In the laboratories of modern physics the elementary components of matter are studied. To do this, scientists sometimes build artificial atoms to help them understand the laws of matter. A research team at the Paul Scherrer Institute (Villigen/AG) uses a specifically modified helium atom to determine the exact mass and other properties of pions. Pions could help to understand more precisely where atomic nuclei get their mass from.

atoms

The research alliance between Zurich and Karlsruhe is now united in the new Centre of Atomic Scale Technologies. Although the collaboration has only recently begun, the research groups involved were predestined for the task at hand. Thomas Schimmel is a pioneer of electronic circuits at the level of the atom, and Jürg Leuthold has demonstrated in his past research that photonic switches are possible at the atomic level. Moreover, Leuthold was the first researcher able to place both optical and electronic switching elements on the same chip. The tiny chip is also a modulator that can transform electrical signals into light signals and vice-versa—an extremely useful feature for transmitting data in fibre optic cables.

Review Article On Entanglement And Quantum Metrology With Atomic Ensembles

After applying the microwave field for some time, its spatial field distribution is therefore imprinted onto the hyperfine state distribution in the atomic cloud. From this distribution, which we image onto a CCD-camera, we can reconstruct the microwave field. We strive to image and measure molecular properties with ever increasing resolution. We are investigating the fundamental properties of individual atoms and molecules on solid surfaces. We are specifically interested in the build-up of novel molecules and atomic-scale nanostructures using atom manipulation, that is, creating them with the tip of the microscope. Microwaves are an essential part of modern communication technology.

  • The research alliance between Zurich and Karlsruhe is now united in the new Centre of Atomic Scale Technologies.
  • Unlike stars and galaxies, dark matter does not emit any light or electromagnetic radiation of any kind, so that we can detect it only through its gravitational effects.
  • From p2 we can reconstruct

    Similar to a top that begins to wobble – experts call this precession – nuclear spins that are exposed to a magnetic field begin to precess. This generates an electromagnetic signal that can be measured using an induction coil. The key step to achieving atomic resolution on molecules is the functionalization of the microscope’s tip apex with a suitable, atomically well-defined termination, such as a CO molecule . In this case, atomic manipulation techniques are essential for the controlled buildup of the tip used for AFM imaging . Cold cesium atoms magnetically extracted from a 2D magneto-optical trap”. Europhys. Lett. 41, p.141 . But here comes the “trick” played by the researchers to generate an entangled state.

    The Microchip Of The Future

    “This fundamental understanding is critical, as it’s key to finding a technological application,” Schimmel says, adding that, “we can only control what we understand”. Professor Thomas Schimmel is a research partner in the single-atom switch project conducted at the Swiss Federal Institute of Technology Zurich ; the project receives funding from the Werner Siemens Foundation. Schimmel is considered a pioneer in single-atom electronics; in his Karlsruhe lab, he invented a mind-bogglingly efficient single-atom transistor that could significantly lower energy consumption in computers. Now, he is collaborating with the teams of his ETH Zurich colleagues, Professor Jürg Leuthold and Professor Mathieu Luisier, to translate the innovative invention into practical application. By 2021, the researchers aim to have laid the theoretical and technological groundwork necessary to create a prototype processor with 20 single-atom components.

    Community Workshop On Cold Atoms In Space

    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.

    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 fraction of the universe, in fact 26%, is made of an unknown type of matter called “dark matter”.

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