Phys.org October 28, 2022 Researchers in Austria have developed a universal gate set for quantum computing with all-to-all connectivity and intrinsic robustness to bit-flip errors based on parity encoding. They showed that logical controlled phase gate and Rz rotations can be implemented in parity encoding with single-qubit operations. Together with logical Rx rotations, implemented via nearest-neighbor controlled-NOT gates and an Rx rotation, these form a universal gate set. As the controlled phase gate requires only single-qubit rotations, the proposed scheme has advantages for several cornerstone quantum algorithms, e.g., the quantum Fourier transform. They presented a method to switch between different […]
Tag Archives: S&T Austria
Multisensory hybrid material as smart electronic skin
Nanowerk May 16, 2022 Researchers in Austria proposed a simplified design with biocompatible materials for an efficient electronic skin. They demonstrated that it can deliver multi-stimuli sensitivity with high spatial resolution. While the piezoelectricity of ZnO provided sensitivity to external force, the thermoresponsiveness of the hydrogel core provided sensitivity to surrounding temperature and humidity changes. The hydrogel core exerted mechanical stress onto the ZnO shell, which was translated to a measurable piezoelectric signal. A localized force sensitivity was achieved with very low cross talk. They demonstrated the sensor’s sensitivity to humidity was above and below the hydrogel’s lower critical solution […]
A new AI chip can perform image recognition tasks in nanoseconds
MIT Technology Review March 4, 2020 Visual information is captured by a frame-based camera, converted into a digital format and processed afterwards using a machine-learning algorithm such as an artificial neural network (ANN). The large amount of data passed through the entire signal chain, however, results in low frame rates and high-power consumption. Researchers in Austria built a sensor based on a reconfigurable two-dimensional semiconductor photodiode array, and the synaptic weights of the network are stored in a continuously tunable photoresponsivity matrix. The sensor can itself constitute an ANN that can simultaneously sense and process optical images without latency. They […]
Solving the mystery of quantum light in thin layers
Science Daily October 15, 2019 Single-photon emitters play a key role in present and emerging quantum technologies. Several recent measurements have established monolayer WSe2 as a promising candidate for a reliable single-photon source. Researchers in Austria have shown that the origin and underlying microscopic processes responsible for this quantum light effect are the subtle interaction of single atomic defects in the material and mechanical strain. Computer simulations show how the electrons are driven to specific places in the material, where they are captured by a defect, lose energy and emit a photon…read more. TECHNICAL ARTICLE
A new alphabet to write and read quantum messages with very fast particles
Phys.org September 2, 2019 If the quantum particle is relativistic it is impossible for standard techniques to decode the message unambiguously, and the communication therefore fails. Researchers in Austria deliver a new definition of the spin of quantum particles that move very quickly. It modifies both the way Anna writes the message and the way Bill reads it. Key to this technique is a “translation” of the way the message would be written and read between the standard alphabet used when the electron is at rest, and the new alphabet used when the electron travels very fast. These results indicate […]
Single atoms as catalysts
Nanowerk September 2, 2019 Researchers in Austria have shown that metal atoms can be placed on a metal oxide surface so that they show exactly the desired chemical behavior. When metal atoms are deposited on a metal oxide surface, they usually have a very strong tendency to clump together and form nanoparticles. Instead of attaching the active metal atoms to a surface, it is also possible to incorporate them into a molecule with cleverly selected neighboring atoms. The molecules and reactants are then dissolved into a liquid where the chemical reactions take place. They have developed a technique to incorporate […]
Battery research: New breakthroughs in research on super-batteries
Science Daily April 25, 2019 Previously researchers in Austria uncovered that cell ageing in living organisms and in batteries are caused by highly reactive singlet oxygen. Redox mediators play a vital role in the flow of electrons between the exterior circuit and the charge storage material in oxygen batteries and have a considerable impact on their performance. Singlet oxygen also triggers parasitic reactions, which compromise battery life and rechargeability. The researchers identified DABCOnium — which is a salt of the organic nitrogen compound DABCO — as an electrolyte additive which is much more resistant to oxidation and compatible with a […]
Novel laser technology for microchip-size chemical sensors
Science Daily December 10, 2018 Researchers in Austria produced quantum cascade lasers which generate a frequency comb in the infrared range. With the help of an electrical signal of a specific frequency the quantum cascade lasers can be controlled to emit a series of light frequencies, which are all coupled together. The system is robust and can withstand temperature fluctuations, or reflections that send some of the light back into the laser. It can be easily miniaturized. The entire measuring system can be accommodated on a chip in millimeter format. The chip could be placed on a drone to measure […]
One step closer to complex quantum teleportation
Science Daily November 2, 2018 Researchers in Austria are pursuing a new path to increase the information capacity of complex quantum systems – instead of just increasing the number of particles involved, the complexity of each system is increased. By using a computer algorithm Melvin that autonomously searches for an experimental implementation, they entangled three photons beyond the conventional two-dimensional nature using quantum systems which have more than two possible states — in this particular case, the angular momentum of individual light particles. The individual photons now have a higher information capacity than QuBits. The developed methods and technologies could […]
‘Two-way signaling’ possible with a single quantum particle
Physorg February 26, 2018 By using a quantum particle that has been put in a superposition of two different locations, researchers in Austria have theoretically shown that both partners are able to encode their messages into a single quantum particle simultaneously. Being in a quantum superposition means that the quantum particle is “simultaneously present” at each partner’s location. Therefore, both partners are able to encode their messages into a single quantum particle simultaneously, a task that is essentially impossible using classical physics. The experimental results show that the communication is secure and anonymous, the direction of communication is hidden—an eavesdropper […]