Using integrated circuit fabrication techniques, a team of researchers from Yale University has bound a single photon to a superconducting device engineered to behave like a single atom, forming an artificial molecule. Its the first experimental result in a field Yale professors Robert Schoelkopf and Steven Girvin have dubbed Circuit Quantum Electrodynamics.
The superconducting devices can be operated as qubits, the basic element of information storage in the field of quantum computing. In the September 9th issue of the journal Nature, Andreas Wallraff and his colleagues present telltale evidence that their qubit was coupling to a microwave photon, sharing energy in much the same way electrons are shared when two atoms combine to form a molecule. They offered two suggestions for naming the new, combined state: phobit or quton.
Qutons have been made before, the first about 12 years ago. But by using artificial atoms for their qubits instead of real ones, and microwave transmission lines instead of optical cavities, the Yale physicists were able to shrink a roomful of experimental apparatus onto a chip less than 1 square centimeter (or less than ¼ square inch) in size. They have also improved the coupling between resonator and "atom" by a factor of about 1000, which will help them explore fundamental interactions of light and matter. Soon they will try to control several qubits on one chip, using photons to connect them together in a prototype architecture for quantum computing and quantum cryptography.
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02.12.2016 | Penn State
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02.12.2016 | University of Toronto
A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.
Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...
In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.
“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...
The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.
The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...
Broadband rotational spectroscopy unravels structural reshaping of isolated molecules in the gas phase to accommodate water
In two recent publications in the Journal of Chemical Physics and in the Journal of Physical Chemistry Letters, researchers around Melanie Schnell from the Max...
The efficiency of power electronic systems is not solely dependent on electrical efficiency but also on weight, for example, in mobile systems. When the weight of relevant components and devices in airplanes, for instance, is reduced, fuel savings can be achieved and correspondingly greenhouse gas emissions decreased. New materials and components based on gallium nitride (GaN) can help to reduce weight and increase the efficiency. With these new materials, power electronic switches can be operated at higher switching frequency, resulting in higher power density and lower material costs.
Researchers at the Fraunhofer Institute for Solar Energy Systems ISE together with partners have investigated how these materials can be used to make power...
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