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IMAGE: Quantum particles lined up in a lattice form the basis for an error-tolerant quantum processor. view more
Credit: Uni Innsbruck/Harald Ritsch
Even computers can miscalculate. Already small disturbances change stored information and corrupt results. That is why computers use methods to continuously correct such errors. In quantum computers, the vulnerability to errors can be reduced by storing quantum information in more than a single quantum particle. These logical quantum bits are less sensitive to errors. In recent years, theorists have developed many different error correction codes and optimized them for different tasks. The most promising codes in quantum error correction are those defined on a two-dimensional lattice, explains Thomas Monz from the Department of Experimental Physics at the University of Innsbruck. This is due to the fact that the physical structure of current quantum computers can be very well mapped through such lattices. With
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IMAGE: Researchers at Linköping University, Sweden, have developed efficient blue light-emitting diodes based on halide perovskites. view more
Credit: Thor Balkhed
Researchers at Linköping University, Sweden, have developed efficient blue light-emitting diodes based on halide perovskites. We are very excited about this breakthrough , says Feng Gao, professor at Linköping University. The new LEDs may open the way to cheap and energy-efficient illumination.
Illumination is responsible for approximately 20% of global electricity consumption, a figure that could be reduced to 5% if all light sources consisted of light-emitting diodes (LEDs). The blue-white LEDs currently in use, however, need complicated manufacturing methods and are expensive, which makes it more difficult to achieve a global transition.
Cell-spanning whirlpools in the immature egg cells of animals such as mice, zebrafish and fruit flies quickly mix the cells innards, but scientists didn t know how these flows form. Using mathematical modeling, researchers have found an answer. The gyres result from the collective behavior of rodlike molecular tubes called microtubules that extend inward from the cells membranes, the researchers report.
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IMAGE: Rice University chemists turned otherwise-worthless pyrolyzed ash from plastic recycling into graphene through a Joule heating process. The graphene could be used to strengthen concrete and toughen plastics used in. view more
Credit: Tour Group/Rice University
HOUSTON - (Jan. 13, 2021) - Pyrolyzed plastic ash is worthless, but perhaps not for long.
Rice University scientists have turned their attention to Joule heating of the material, a byproduct of plastic recycling processes. A strong jolt of energy flashes it into graphene.
The technique by the lab of Rice chemist James Tour produces turbostratic graphene flakes that can be directly added to other substances like films of polyvinyl alcohol (PVA) that better resist water in packaging and cement paste and concrete, dramatically increasing their compressive strength.
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IMAGE: From left to right: Favorites sites of oxygen: map of Rh oxidation, measured by Scanning Photoelectron Microscopy (SPEM); in situ Photoemission Electron Microscopy (PEEM) of catalytic hydrogen oxidation on Rh;. view more
Credit: TU WIen
Metal surfaces play a role as catalysts for many important applications - from fuel cells to the purification of car exhaust gases. However, their behaviour is decisively affected by oxygen atoms incorporated into the surface.
This phenomenon has been known for a long time, but until now it has not been possible to precisely investigate the role of oxygen in complex surfaces point by point in order to understand the chemical background at the atomic level. This has now been achieved at TU Wien in cooperation with a team from the Elettra Synchrotron in Trieste. It became possible to explain why in previous studies partly contradictory results had been obtained: the oxygen atoms are not distributed evenly, but settle down