Home - Qove Laboratory

We Build Quantum Technologies

Welcome to Qove Laboratory! We are a research team located at the National University of Singapore and focused on designing and building Quantum Technologies with an emphasis on Quantum Networks. Our experimental platforms include superconducting circuits, rare-earth ions in solid-state and integrated photonics. Contact us to know more about our exciting projects and how you can be a part of it!

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About the PI - Steven Touzard

Steven earned his PhD from Yale University from the group of Michel Devoret. His work focused on stabilizing bosonic codes in superconducting circuits. He then did a post-doc at the National University of Singapore on quantum information processing with neutral Strontium atoms. Steven also worked as a consultant for quantum computing companies Alice&Bob and Xanadu.

In 2021, Steven was awarded the National Research Foundation Fellowship (Class of 2022) to start a new research initiative in Singapore focusing on building quantum networks of superconducting circuits. He was then appointed as a Presidential Young Professor in the departments of Material Science and Engineering as well as the department of Physics.

Our Projects

Integrated optics strong collective coupling to Erbium Ions defects

Erbium Ions defects in solids are candidates of choice for Quantum Technologies such as Quantum computing (in measurement based quantum computing) and quantum networks (quantum repeaters, memories…). These defects are parts of the field of Rare-Earth ions, with the particularity of having their main transition frequency at 1550 nm, where commercial telecommunication fibers attenuate the least. Therefore, technologies leveraging Erbium Ions can be readily integrated in existing infrastructures and carry quantum signals over kilometers at room temperature. Finally, these ions are also sensitive to magnetic fields, so that their Zeeman splitting is in the microwave regime. This latest part allows Rare-Earth ions to communicate with both superconducting circuits and optical Quantum Technologies.Our team is investigating how to reach the novel strong-collective regime between a large ensemble of Erbium Ions and high-quality ring resonators made of Lithium Niobate on Insulators. This material forms the backbone of integrated photonics, thanks to their wide transparency windows and their good electro-optic effect. Our collaborator Zhu Di helps us develop state-of-the-art resonators (Q>1M), which sets us on par with leading groups in photonics.The team leverages the lab’s capabilities given by our dilution refrigerator, nanopositioners, fast modulators, Heterodyne/homodyne measurement, chip bonding, nanofabrication and more to achieve this regime and develop ground breaking new quantum technologies.

Superconducting circuits strongly coupled to Erbium Ions in solids

Erbium Ions in solids are exceptional candidates to store and process quantum information on timescales beyond other platforms. Their fine structure and Zeeman splitting allows them to be coupled to both optical and microwave photons. This latter capability makes them a powerful choice to store the information of superconducting circuits, which can be done thanks to the strong collective coupling previously achieved in other groups.Our team is leveraging the Transmon qubit to go beyond the state-of-the-art, which currently consists in storing classical information in Erbium ions. For this, they make use of our ultra-fast microwave measurement setup, our dilution refrigerator and nanofabrication capabilities.

Broadband Josephson Parametric Amplifiers

Quantum technologies operating at microwave technologies, such as Rare Earth ion memories and superconducting circuits, must work at cryogenic temperatures to avoid thermal photons. As a consequence, efficiently extracting a signal from these systems requires quantum limited amplification. Such amplifiers rely on the non-lineariry of the Josephson junctions, lossless superconducting tunneling junctions.Our group is looking at novel circuit architectures to provide larger bandwidth and dynamic range for these amplifiers.

Superconducting circuits without He3

Current superconducting circuits will only work at temperatures that can be obtained with the dilution of He3/He4 mix. This mix is expensive and subject to export restrictions, as He3 is a strategic ressource.Our team aims at changing this state-of-affairs by developing Josephson junctions made of Aluminium proximitized with higher-Tc superconductors, such as Niobium.Soon, we hope to develop quantum technologies that work without any He3, both at microwave and mm-Wave frequencies.

Join the team!

We are looking for new teammates who are ready to take part in an exciting and ambitious endeavor. In joining us, you will be immersed in a trans-disciplinary team within a community of experts. Are you ready to build quantum technologies? Don’t hesitate to contact us here!

Our group is strongly committed to increase the representation of women and minorities in STEM at all levels. We therefore particularly encourage applications that will help us in this goal.

Post-doctoral Fellow (Superconducting circuits)

You will be part of a well funded initiative to create hybrid systems with superconducting circuits and rare-earth ions for quantum information processing. Your job will include the following subjects:
- Leading the measurement of superconducting circuits in state-of-the-art systems.
- Operating dilution refrigerators (Bluefors LD400)
- Operating large superconducting electro-magnets (up to 1 Tesla)
- Mentoring graduate students

If your profile includes an inclination for nano-fabrication you might work on:
- Spearheading the development and fabrication of chips that combine superconducting circuits and rare-earth ions (including on-site lithography and metal deposition)
- Exploring novel fabrication methods to couple rare-earth ions in solid-state with integrated optics and superconducting circuits

You will also work closely with the PI to develop future experimental goals and shape the general research direction of the group. There will also be ample opportunity to explore your own ideas and participate in grant-writing processes. We aim to provide you a challenging and supportive environment to perfect your research leadership skills and get ready for your next career step! On top of an attracting package, you will also be evolving in Singapore's highly fruitful Quantum Ecosystem that provides ample opportunities for funding and career prospects.

Postdoc applicants should have proven research experience and have a strong interest in quantum technologies. Furthermore, a PhD in Experimental Physics or Engineering is required.

Ideally the candidate received its PhD working on superconducting circuits, spin defects in solid-state, integrated optics or quantum optics experiments. A good knowledge of quantum mechanics / quantum optics is required. An excellent command of the English language is essential.

We are strongly committed to ensuring the wellbeing of our group. We provide good benefits and work-life balance. Multiple people in the group and around are trained peer-supporters. Our group is also strongly committed to increase the representation of women and minorities in STEM at all levels. We therefore particularly encourage applications that will help us in this goal. We are also committed to ensuring the wellbeing of our group. We provide good benefits and work-life balance. Multiple people in the group and around are trained peer-supporters.

Post-doctoral Fellow (Integrated Optics)

We have openings for talented young scientists who are ready to take up a leadership role in our group and to spearhead new initiatives and provide supervision and guidance to junior members of the team.

You will be part of a well funded initiative to create hybrid systems with Lithium Niobate and rare-earth ions for quantum information processing. Your job will include the following subjects:
- Leading the measurement of Integrated Photonics chips
- Operating dilution refrigerators (Bluefors LD400)
- Mentoring graduate students

If your profile includes an inclination for nano-fabrication you might work on:
- Spearheading the development and fabrication of chips that combine integrated photonics and rare-earth ions (including on-site lithography and etching)
- Exploring novel fabrication methods to couple rare-earth ions in solid-state with integrated optics and superconducting circuits

You will also work closely with the PI to develop future experimental goals and shape the general research direction of the group. There will also be ample opportunity to explore your own ideas and participate in grant-writing processes. We aim to provide you a challenging and supportive environment to perfect your research leadership skills and get ready for your next career step! On top of an attracting package, you will also be evolving in Singapore's highly fruitful Quantum Ecosystem that provides ample opportunities for funding and career prospects.

Postdoc applicants should have proven research experience and have a strong interest in quantum technologies. Furthermore, a PhD in Experimental Physics or Engineering is required.

Ideally the candidate received its PhD working on superconducting circuits, spin defects in solid-state, integrated optics or quantum optics experiments. A good knowledge of quantum mechanics / quantum optics is required. An excellent command of the English language is essential.

We are strongly committed to ensuring the wellbeing of our group. We provide good benefits and work-life balance. Multiple people in the group and around are trained peer-supporters. Our group is also strongly committed to increase the representation of women and minorities in STEM at all levels. We therefore particularly encourage applications that will help us in this goal. We are also committed to ensuring the wellbeing of our group. We provide good benefits and work-life balance. Multiple people in the group and around are trained peer-supporters.

PhD Students

We are seeking motivated students with excellent problem-solving skills and a passion for quantum engineering and physics. You will be working closely with the senior members of the lab to design, build, and characterize quantum devices. You will also be given the opportunities to develop your own ideas and make impactful discoveries! As part of the vibrant and diverse quantum community in CQT, we work towards fostering a supportive and exciting environment for our students to grow as a scientist and learn about different aspects of quantum technologies.

We are currently accepting applications for Fall 2024, and we also offer rolling entrance.

Requirement: Strong undergraduate track record in experimental physics/engineering disciplines

Interns

We offer year-long research assistantships to undergraduate or masters students who are interested in working in cutting-edge research environment and learning how to build quantum technologies. You will work alongside the team to perform day-to-day operations of the lab, carry out various experiments, and contribute to the development of key experimental apparatus. Through this, you will have the opportunity to gain in-depth knowledge about quantum circuits, integrated optics and their supporting technologies. This experience will provide a great foundation for you to continue your scientific journey either as a Ph.D candidate or member of the booming quantum computing industry.

Requirement: Undergraduate/masters degree in physics/engineering, strong hands-on skills.