Researchers from RMIT University in Melbourne have helped crack the code to ultra-secure telecommunications of the future in an international research project that could also expedite the advent of quantum computing.
A team co-led by RMIT MicroNano Research Facility Director Professor David Moss has added a new twist to create photon pairs that fit on a tiny computer chip.
The breakthrough, published in Nature Communications, heralds the next-generation of integrated quantum optical technology, being compatible with current technology and secure communications.
The team pioneered a new approach based on a micro-ring resonator - a tiny optical cavity - in which energy conservation constraints can be exploited to suppress classical effects while amplifying quantum processes.
They used laser beams at different wavelengths and then had to overcome the risk of the two pump beams being able to destroy the photons' fragile quantum state.
"One of the properties of light exploited within quantum optics is 'photon polarization', which is essentially the direction in which the electric field associated with the photon oscillates,'' Moss said.
"Processes used to generate single photons or photon pairs on a chip allow the generation of photons with the same polarization as the laser beam, forcing us to find a way to directly mix, or cross-polarize, the photons via a nonlinear optical process on a chip for the first time.''
Moss worked with Professor Roberto Morandotti at the INRS-EMT in Canada and researchers from the University of Sussex and Herriot Watt University, City University of Hong Kong, and the Xi'an Institute in Chin, on the research.
"While a similar suppression of classical effects has been observed in gas vapours and complex micro-structured fibres, this is the first time it has been reported on a chip, opening a route for building scalable integrated devices that exploit the mixing of polarization on a single photon level,'' he said.
"It also has the advantage that the fabrication process of the chip is compatible with that currently used for electronic chips which not only allows the exploitation of the huge global infrastructure of CMOS foundries, but will ultimately offer the potential to integrate electronic devices on the same chip.
"Both of these are fundamental requirements for the ultimate widespread adoption of optical quantum technologies.''
Greg Thom | EurekAlert!
Supercomputing the emergence of material behavior
18.05.2018 | University of Texas at Austin, Texas Advanced Computing Center
Keeping a Close Eye on Ice Loss
18.05.2018 | Alfred-Wegener-Institut, Helmholtz-Zentrum für Polar- und Meeresforschung
So-called quantum many-body scars allow quantum systems to stay out of equilibrium much longer, explaining experiment | Study published in Nature Physics
Recently, researchers from Harvard and MIT succeeded in trapping a record 53 atoms and individually controlling their quantum state, realizing what is called a...
The historic first detection of gravitational waves from colliding black holes far outside our galaxy opened a new window to understanding the universe. A...
A team led by Austrian experimental physicist Rainer Blatt has succeeded in characterizing the quantum entanglement of two spatially separated atoms by observing their light emission. This fundamental demonstration could lead to the development of highly sensitive optical gradiometers for the precise measurement of the gravitational field or the earth's magnetic field.
The age of quantum technology has long been heralded. Decades of research into the quantum world have led to the development of methods that make it possible...
Cardiovascular tissue engineering aims to treat heart disease with prostheses that grow and regenerate. Now, researchers from the University of Zurich, the Technical University Eindhoven and the Charité Berlin have successfully implanted regenerative heart valves, designed with the aid of computer simulations, into sheep for the first time.
Producing living tissue or organs based on human cells is one of the main research fields in regenerative medicine. Tissue engineering, which involves growing...
A team of scientists of the Max Planck Institute for the Structure and Dynamics of Matter (MPSD) at the Center for Free-Electron Laser Science in Hamburg investigated optically-induced superconductivity in the alkali-doped fulleride K3C60under high external pressures. This study allowed, on one hand, to uniquely assess the nature of the transient state as a superconducting phase. In addition, it unveiled the possibility to induce superconductivity in K3C60 at temperatures far above the -170 degrees Celsius hypothesized previously, and rather all the way to room temperature. The paper by Cantaluppi et al has been published in Nature Physics.
Unlike ordinary metals, superconductors have the unique capability of transporting electrical currents without any loss. Nowadays, their technological...
02.05.2018 | Event News
13.04.2018 | Event News
12.04.2018 | Event News
18.05.2018 | Power and Electrical Engineering
18.05.2018 | Information Technology
18.05.2018 | Information Technology