Universite de Sherbrooke, Institut Quantique

Position ID:Universite de Sherbrooke-Institut Quantique-PDF2 [#19847]
Position Title: Postdoctoral Scholar - Theory of superconducting quantum devices
Position Type:Postdoctoral
Position Location:Sherbrooke, Quebec J1K 2R1, Canada [map]
Subject Area: Quantum Information Science
Appl Deadline:2021/12/01 11:59PMhelp popup (posted 2021/09/29, listed until 2022/01/05)
Position Description:    

Postdoctoral Scholar - Theory of superconducting quantum devices

The group of Prof. Alexandre Blais at the Institut quantique of the Universit de Sherbrooke invites applications for postdoctoral scholar positions in theoretical quantum information science and quantum optics. Areas of interest include superconducting quantum circuits, circuit QED, quantum error correction, microwave quantum optics, variational quantum algorithms, and machine learning. Applicants should be highly motivated and have a strong background in one of the above-mentioned subjects. The appointments are expected to be for 2 years. The start date is flexible.

About the Institut quantique and A. Blais' research group
The Institut Quantique at Universit de Sherbrooke is a North American leader in the advancement of quantum science and technologies. The institute brings together over 250 students, postdocs and PI working on quantum information, quantum engineering and quantum materials in order to conduct outstanding fundamental research and develop the quantum technologies of the future. Its dynamic research environment attracts students from around the world as well as renowned researchers, offering weekly seminars and annual workshops on quantum materials, quantum information, mesoscopic physics or numerical methods. Furthermore, the Institutes new research facility, to be inaugurated in 2021, will house state of the art laboratories and workspaces specially designed for a prolific research environment. As it is host to an IBM Quantum Hub, Institut quantique members have privileged access to IBMs most advanced quantum computing systems, opening a world of research possibilities in a unique environment in which collaborative projects are developed in partnership with industry.

Within IQ, members of Alexandre Blais group have the opportunity to collaborate with academic and industrial groups worldwide, and are part of the Quantum Science Accelerator recently funded by the US Department of Energy. More information on the Institut quantique and on Alexandre Blais group can be found here and here.  

Examples of projects include:
1. Robust Superconducting Qubits

Superconducting quantum circuits is one of the most promising approaches to building a quantum computer. A reason for this is the increase in the coherence and relaxation time of superconducting qubits over the last decades, starting from less than a nanosecond in the early 2000s to several hundreds of microseconds nowadays. Thanks to these advances, it is possible to run simple quantum algorithms with tens of these qubits. However, scaling up to larger quantum processors still requires a significant improvement in the quality of all its components. Therefore, the objective of this project is to design more robust superconducting qubits. Among the promising avenues are bosonic qubits, where quantum information is stored in high-quality electromagnetic cavities, and variations on the 0-? qubit which exploits symmetries to decouple the qubit from its noisy environment. This theoretical work will be done in close collaboration with experimental groups at partner institutions such as UC Berkeley and MIT from the Quantum System Accelerator, a US-funded quantum technology center.

2. Quantum algorithms for small-scale superconducting quantum processors

Quantum processors based on superconducting qubits have already been used to reach quantum advantage, where the quantum processor outperforms classical processors at a specific task. Despite this remarkable achievement, current quantum processors are still too error-prone to perform useful computations. A major challenge in this field is to design useful quantum algorithms for todays small-scale quantum computers. A class of quantum algorithms that is particularly promising is known as hybrid quantum algorithms, where a classical processor calls upon a quantum processor to solve an optimization task. To extract as much computational power as possible from the current, imperfect, quantum computers, we propose to adapt hybrid quantum algorithms to the specific architecture of superconducting quantum processors. A key step in this process will be to express hybrid quantum algorithms in terms of gates that are native to these processors. Moreover, to understand how to mitigate its effect, we propose to explore the effect of realistic noise on the performance of hybrid quantum algorithms. Tests on real devices with up to 65 qubits (as of today) will be performed using the IBM quantum processors available to the group through the Institut quantiques IBM Q Hub.

3. Detecting dark matter with superconducting quantum circuits

Even though there is much evidence of its existence, the nature of dark matter remains one of the great mysteries of modern physics. Indeed, none of the known fundamental particles have the adequate properties to compose this non-conventional matter. A number of candidate particles have been proposed, among which are axions and dark photons, yet experimental research for the detection of these and other candidate dark matter particles has so far been unsuccessful. An important challenge is that the expected signal is very weak and is therefore drowned out by a significant background noise. New and more sensitive measurement techniques must therefore be developed, and quantum technologies based on superconducting quantum circuits are a particularly promising avenue. First experiments have already demonstrated that superconducting quantum circuits can be used to increase the sensitivity of axion detection and thus accelerate their discovery. The objective of the project is to develop more sensitive methods for the detection of dark matter axions using superconducting quantum circuits. As part of an international and multidisciplinary team, the candidate will work collaboratively with experimental groups at the Institut quantique and worldwide in order to accelerate our understanding of the nature of dark matter.

To apply
Please submit a cover letter and a CV including a list of publications. Applicants should also arrange to have two letters of references sent in support of the application. Applications and letters will be considered at any time until the position is filled but must be received no later than December 1, 2021 to guarantee full consideration.

Application Materials Required:
Submit the following items online at this website to complete your application:
And anything else requested in the position description.

Further Info:
Institut quantique
Universit de Sherbrooke
2500, boul. de lUniversit
Sherbrooke (Qubec)

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