Professor Michelle Simmons

Professor Michelle Simmons "For pioneering ultra-fast quantum computers" - 2017 Laureate L'Oréal-UNESCO

Predicting the weather and natural catastrophes, breaking complex cryptographic codes, optimizing the routes for millions of travelers… In the era of Big Data, traditional computers are reaching their limits in terms of size and power. Professor Michelle Simmons has been developing the computers of the future: quantum computers. These extremely small and powerful machines could solve certain problems in 10 seconds compared to many thousands of years for a traditional computer.


This breakthrough is possible thanks to the atomic transistor. A transistor is the main component of all computers and it is the interconnection between millions of transistors on chips that allow electronics devices to work. The classical transistor was invented in 1947 and has been decreasing in size ever since, but Prof. Simmons’ work shows that it is now possible to create transistors all the way down to the atomic scale. In 2010, after perfecting the fabrication process for over a decade, her research team at the Centre of Excellence for Quantum Computation and Communication Technology in Sydney succeeded in creating the world’s first atomic transistor from several atoms of phosphorus embedded in a silicon crystal. These transistors will be used to make tiny computers that exploit the principles of quantum mechanics to process information much faster than is possible with conventional computers.


In 2012, together with her team, she broke another world record by creating a transistor made from just one atom. The same year, they succeeded in fabricating the thinnest conducting doped wires in silicon. These wires are 10 000 times thinner than a human hair and are key components of an atomic-sized computer.

“Optimization and machine learning problems are amongst the first application areas,” explains Prof. Simmons. “For example, UPS have noted that if they can shorten the distance that their drivers travel in the US by one mile every day, they will save their company 50 million dollars a year.”


The researcher has six patents in this space to prepare for such potential applications in industry. She has also published more than 380 articles in some of the most prestigious scientific journals. She is also a natural leader, and one of the youngest scientist to have been elected to the Australian Academy of Sciences, when she was just 36 years old in 2006. An outstanding communicator, she now directs 180 researchers at the Center of Excellence which she helped to co-found in 2000. Not afraid of challenges, she chose the field of quantum physics for its complexity and her wish to “push things to their limits”. Her greatest achievement is having convinced the world that atomic-scale electronics is possible, paving the way forward for a quantum revolution in computing.

L’Oréal–UNESCO
For Women in Science

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