Welcome

Since the 1960s, technological advances have enabled silicon transistors to keep shrinking, causing computational capability to grow exponentially. However, transistors cannot shrink much further; they are already so small that the laws of quantum mechanics begin to impair their performance. Fortunately, quantum mechanical behaviour also opens amazing new possibilities for computation. A well-developed theory for a radically new Quantum Information Technology proves that computers that rely fundamentally on quantum mechanics can potentially solve many important computational problems that will remain forever intractable using conventional computers. This will impact fields as diverse as drug development, design and discovery of new materials, machine learning, and cryptography.

We are working to build quantum technologies using silicon, the very same material currently used to make transistors and computer chips for the giant ‘classical’ computing industry. Very fortunately, silicon also hosts arguably the best quantum bits (‘qubits’) in the industry. We are particularly excited about an opportunity to link the excellent spin qubits associated with chalcogen donors (namely selenium, sulphur, and tellurium) in silicon with photon qubits. Much of our current work concerns the development and proof of principle of this ‘photonic link’ in silicon. Not only will photonic qubits enable links between various spin qubits, they also can be used to link multiple quantum chips — towards what some call a ‘quantum internet’. This approach will also have concrete scale-up advantages including higher-temperature operation, ease of manufacturing, and robust and atomically identical qubits. If we’re successful, this platform will be used not only to make a quantum computer but also to make provably secure quantum communication, quantum sensors, and more.

People

  • Stephanie Simmons

    Principal Investigator

  • Rohan Abraham

    Graduate Student

  • Kevin Morse

    Researcher

  • Adam DeAbreu

    Graduate Student

  • Camille Bowness

    Graduate Student

  • Timothy Richards

    Graduate Student

  • Alexander Kurkjian

    Graduate Student

  • Camille Chartrand

    Graduate Student

  • Laurent Bergeron

    Graduate Student

  • Betka Medveďová

    Summer Student

Publications

A subset of our most recent publications.

Zero field optical magnetic resonance study of phosphorus donors in 28-silicon
Kevin J. Morse, Phillip Dluhy, Julian Huber, Jeff Z. Salvail, Kamyar Saeedi, Helge Riemann, Nikolay V. Abrosimov, Peter Becker, Hans-Joachim Pohl, S. Simmons, M. L. W. Thewalt (2018)

Coherent control via weak measurements in $^{31}$P single-atom electron and nuclear spin qubits
J. T. Muhonen, J. P. Dehollain, A. Laucht, S. Simmons, R. Kalra, F. E. Hudson, D. N. Jamieson, J. C. McCallum, K. M. Itoh, A. S. Dzurak, A. Morello (2017)

A single-atom quantum memory in silicon
S. Freer, S. Simmons, A. Laucht, J. T. Muhonen, J. P. Dehollain, R. Kalra, F. A. Mohiyaddin, F. Hudson, K. M. Itoh, J. C. McCallum, D. N. Jamieson, A. S. Dzurak, A. Morello (2016)

Breaking the rotating wave approximation for a strongly-driven, dressed, single electron spin
Arne Laucht, Stephanie Simmons, Rachpon Kalra, Guilherme Tosi, Juan P. Dehollain, Juha T. Muhonen, Solomon Freer, Fay E. Hudson, Kohei M. Itoh, David N. Jamieson, Jeffrey C. McCallum, Andrew S. Dzurak, Andrea Morello (2016)

Vibration-induced electrical noise in a cryogen-free dilution refrigerator: characterization, mitigation, and impact on qubit coherence
Rachpon Kalra, Arne Laucht, Juan P. Dehollain, Daniel Bar, Solomon Freer, Stephanie Simmons, Juha T. Muhonen, Andrea Morello (2016)

Optimization of a solid-state electron spin qubit using Gate Set Tomography
Juan P. Dehollain, Juha T. Muhonen, Robin Blume-Kohout, Kenneth M. Rudinger, John King Gamble, Erik Nielsen, Arne Laucht, Stephanie Simmons, Rachpon Kalra, Andrew S. Dzurak, Andrea Morello (2016)

A photonic platform for donor spin qubits in silicon
Kevin J. Morse, Rohan J. S. Abraham, Helge Riemann, Nikolai V. Abrosimov, Peter Becker, Hans-Joachim Pohl, Michael L. W. Thewalt, Stephanie Simmons (2016)

Enabling Privacy-Preserving GWAS in Heterogeneous Human Populations
Sean Simmons, Cenk Sahinalp, Bonnie Berger (2016)

A Dressed Spin Qubit in Silicon
Arne Laucht, Rachpon Kalra, Stephanie Simmons, Juan P. Dehollain, Juha T. Muhonen, Fahd A. Mohiyaddin, Solomon Freer, Fay E. Hudson, Kohei M. Itoh, David N. Jamieson, Jeffrey C. McCallum, Andrew S. Dzurak, A. Morello (2016)

$^{29}$Si nuclear spins as a resource for donor spin qubits in silicon
Gary Wolfowicz, Pierre-Andre Mortemousque, Roland Guichard, Stephanie Simmons, Mike L. W. Thewalt, Kohei M. Itoh, John J. L. Morton (2015)