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Researchers have developed a topological photonic chip to process quantum data, promising a more robust future for versatile quantum computers.
The research group, led by Dr. Alberto Peruzzo of the RMIT University, has shown that quantum data can be encoded, prepared and exchanged upon separation with the topological circuits of the chip. The research is published in Science Advances.
New discoveries could lead to the development of new materials, new generation computers, and a deep understanding of basic science.
In collaboration with researchers from Politecnico di Milano and ETH Zurich, researchers used topological photonics – a rapidly developing field that aims to examine the science of the topological phases of matter in an optical context – to manufacture a chip with a "beam splitter" make a quantum photonic gate of high precision.
"We expect that the new chip design will pave the way for the study of quantum effects in topology materials and a new field of topologically robust quantum processing in integrated photonics technology," says Peruzzo, senior research scientist at the Center for Disease Control. ARC Excellence Communication Technology (CQC2T) and Director, Quantum Photonics Laboratory, RMIT.
"Topological photonics has the advantage of not requiring strong magnetic fields and exhibits intrinsically consistent operation at room temperature and easy handling," Peruzzo explains.
"These are essential requirements for scaling up quantum computers."
Reproducing the important experiment of Hong-Ou-Mandel (HOM) – which takes two photons and manipulates them according to the laws of quantum mechanics – the group could use the photonic chip to illustrate that topological states can cause a quantum obstruction .
The HOM impedance is at the heart of optical quantum computation, particularly tricky for errors. Topologically guaranteed states could add robustness to quantum correspondence, a decrease in clamor and deformations common to quantum innovation. This is particularly attractive for the manipulation of optical quantum data.
"Previous research had focused on topological photonics using" classical "laser light, which behaves like a conventional wave.We use unique photons that behave according to quantum mechanics," says Jean-Luc Tambasco RMIT
Presenting a high fidelity quantum impedance is a prerequisite for the transmission of accurate information with the aid of unique photons for quantum exchanges – a fundamental part of a global quantum lattice.
"This work crosses the two burgeoning areas of quantum technology and topological insulators and can lead to the development of new materials, new generation computers and basic science," Peruzzo says.
This research is part of CQC2T's photonic quantum processing program, which creates parallel methodologies using optical and silicon processors in the race to build the first quantum computing system.
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