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.
Scientists propose synestia, a new type of planetary object
23.05.2017 | University of California - Davis
Turmoil in sluggish electrons’ existence
23.05.2017 | Max-Planck-Institut für Quantenoptik
An international team of physicists has monitored the scattering behaviour of electrons in a non-conducting material in real-time. Their insights could be beneficial for radiotherapy.
We can refer to electrons in non-conducting materials as ‘sluggish’. Typically, they remain fixed in a location, deep inside an atomic composite. It is hence...
Two-dimensional magnetic structures are regarded as a promising material for new types of data storage, since the magnetic properties of individual molecular building blocks can be investigated and modified. For the first time, researchers have now produced a wafer-thin ferrimagnet, in which molecules with different magnetic centers arrange themselves on a gold surface to form a checkerboard pattern. Scientists at the Swiss Nanoscience Institute at the University of Basel and the Paul Scherrer Institute published their findings in the journal Nature Communications.
Ferrimagnets are composed of two centers which are magnetized at different strengths and point in opposing directions. Two-dimensional, quasi-flat ferrimagnets...
An Australian-Chinese research team has created the world's thinnest hologram, paving the way towards the integration of 3D holography into everyday...
In the race to produce a quantum computer, a number of projects are seeking a way to create quantum bits -- or qubits -- that are stable, meaning they are not much affected by changes in their environment. This normally needs highly nonlinear non-dissipative elements capable of functioning at very low temperatures.
In pursuit of this goal, researchers at EPFL's Laboratory of Photonics and Quantum Measurements LPQM (STI/SB), have investigated a nonlinear graphene-based...
Dental plaque and the viscous brown slime in drainpipes are two familiar examples of bacterial biofilms. Removing such bacterial depositions from surfaces is...
23.05.2017 | Event News
22.05.2017 | Event News
17.05.2017 | Event News
23.05.2017 | Physics and Astronomy
23.05.2017 | Life Sciences
23.05.2017 | Medical Engineering