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 a number of luminescent defects 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

    Stephanie Simmons

    Principal Investigator

  • Mike Thewalt

    Mike Thewalt

    Principal Investigator

  • Kevin Morse

    Kevin Morse

    Research Associate

  • Daniel Higginbottom

    Daniel Higginbottom

    Postdoctoral Fellow

  • Adam DeAbreu

    Adam DeAbreu

    PhD Candidate

  • Camille Bowness

    Camille Bowness

    PhD Candidate

  • Timothy Richards

    Timothy Richards

    PhD Candidate

  • Alexander Kurkjian

    Alexander Kurkjian

    MSc Candidate

  • Camille Chartrand

    Camille Chartrand

    MSc Candidate

  • Laurent Bergeron

    Laurent Bergeron

    MSc Candidate

  • Moein Kazemi

    Moein Kazemi

    MSc Candidate

Past Members

  • Rohan Abraham

    Rohan Abraham

    PhD Graduate

  • Nadia Chigmaroff

    Nadia Chigmaroff

    Summer Student

  • Stephen Harrigan

    Stephen Harrigan

    Summer Student

  • Joshua Kanaganayagam

    Joshua Kanaganayagam

    Summer Student

  • Betka Medveďová

    Betka Medveďová

    Summer Student

Publications

A subset of our most recent publications.

A Mg-pair isoelectronic bound exciton identified by its isotopic fingerprint in $^{28}$Si
Rohan Abraham, Adam DeAbreu, Kevin Morse, Valentina Shuman, Leonid Portsel, Anatoly Lodygin, Yuri Astrov, Nikolay Abrosimov, Sergey Pavlov, Heinz-Wilhelm Hübers, Stephanie Simmons, Michael Thewalt (2018)

Characterization of the Si:Se+ spin-photon interface
Adam DeAbreu, Camille Bowness, Rohan J. S. Abraham, Alzbeta Medvedova, Kevin J. Morse, Helge Riemann, Nikolay V. Abrosimov, Peter Becker, Hans-Joachim Pohl, Michael L. W. Thewalt, Stephanie Simmons (2018)

Further investigations of the deep double donor magnesium in silicon
Rohan Abraham, Adam DeAbreu, Kevin Morse, Valentina Shuman, Leonid Portsel, Anatoly Lodygin, Yuri Astrov, Nikolay Abrosimov, Sergey Pavlov, Heinz-Wilhelm Hübers, Stephanie Simmons, Michael Thewalt (2018)

Highly enriched $^{28}$Si reveals remarkable optical linewidths and fine structure for well-known damage centers
C. Chartrand, L. Bergeron, K. J. Morse, H. Riemann, N. V. Abrosimov, P. Becker, H. -J. Pohl, S. Simmons, M. L. W. Thewalt (2018)

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)