For years, physicists have been heralding the revolutionary potential of using quantum mechanics to build a new generation of supercomputers, unbreakable codes, and ultra-fast and secure communication networks.
The brave new world of quantum technology may be a big step closer to reality thanks to a team of University of Calgary researchers that has come up with a unique new way of testing quantum devices to determine their function and accuracy. Their breakthrough is reported in today's edition of Science Express, the advanced online publication of the prestigious journal Science.
"Building quantum machines is difficult because they are very complex, therefore the testing you need to do is also very complex," said Barry Sanders, director of the U of C's Institute for Quantum Information Science and a co-author of the paper. "We broke a bunch of taboos with this work because we have come up with an entirely new way of testing that is relatively simple and doesn't require a lot of large and expensive diagnostic equipment."
Similar to any electronic or mechanical device, building a quantum machine requires a thorough understanding of how each part operates and interacts with other parts if the finished product is going to work properly. In the quantum realm, scientists have been struggling to find ways to accurately determine the properties of individual components as they work towards creating useful quantum systems. The U of C team has come up with a highly-accurate method for analyzing quantum optical processes using standard optical techniques involving lasers and lenses.
"It is a completely different approach to quantum characterization than we have seen before," said post-doctoral researcher Mirko Lobino, the paper's lead author. "This process will be able to tell us if something is working correctly and will hopefully lead the way towards a quantum certification process as we move from quantum science to making quantum technology."
The development of quantum computers is considered the next major advancement in computer processing and memory power but is still in its infancy. Unlike regular silicon-based computers that transmit information in binary units (bits) using 1 and 0, quantum computers use the subatomic physical processes of quantum mechanics to transmit information in quantum bits (qubits) that can exist in more than two states. Computers based on quantum physics are predicted to be far more powerful than computers based on classical physics and could break many of the most advanced codes currently used to secure digital information. Quantum physics is also being used to try and create new, unbreakable encryption systems.
The same research group at the U of C, led by physics professor Alexander Lvovsky, made headlines earlier this year when they were one of two teams to independently prove it's possible to store a special kind of light, called a "squeezed vacuum." That work is considered the initial step towards creating memory systems for quantum computing.
Tracing aromatic molecules in the early universe
23.03.2017 | University of California - Riverside
New study maps space dust in 3-D
23.03.2017 | DOE/Lawrence Berkeley National Laboratory
Astronomers from Bonn and Tautenburg in Thuringia (Germany) used the 100-m radio telescope at Effelsberg to observe several galaxy clusters. At the edges of these large accumulations of dark matter, stellar systems (galaxies), hot gas, and charged particles, they found magnetic fields that are exceptionally ordered over distances of many million light years. This makes them the most extended magnetic fields in the universe known so far.
The results will be published on March 22 in the journal „Astronomy & Astrophysics“.
Galaxy clusters are the largest gravitationally bound structures in the universe. With a typical extent of about 10 million light years, i.e. 100 times the...
Researchers at the Goethe University Frankfurt, together with partners from the University of Tübingen in Germany and Queen Mary University as well as Francis Crick Institute from London (UK) have developed a novel technology to decipher the secret ubiquitin code.
Ubiquitin is a small protein that can be linked to other cellular proteins, thereby controlling and modulating their functions. The attachment occurs in many...
In the eternal search for next generation high-efficiency solar cells and LEDs, scientists at Los Alamos National Laboratory and their partners are creating...
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are less stable. Now researchers at the Technical University of Munich (TUM) have, for the first time ever, produced a composite material combining silicon nanosheets and a polymer that is both UV-resistant and easy to process. This brings the scientists a significant step closer to industrial applications like flexible displays and photosensors.
Silicon nanosheets are thin, two-dimensional layers with exceptional optoelectronic properties very similar to those of graphene. Albeit, the nanosheets are...
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to simulate these confined natural conditions in artificial vesicles for the first time. As reported in the academic journal Small, the results are offering better insight into the development of nanoreactors and artificial organelles.
Enzymes behave differently in a test tube compared with the molecular scrum of a living cell. Chemists from the University of Basel have now been able to...
20.03.2017 | Event News
14.03.2017 | Event News
07.03.2017 | Event News
23.03.2017 | Life Sciences
23.03.2017 | Power and Electrical Engineering
23.03.2017 | Earth Sciences