Chalmers seeks 7 researchers to help build a quantum computer

Göteborg (Kommun), Västra Götaland
den 26 februari 2018
den 18 mars 2018
Jonas Bylander

8_Chalmersplatsen-1.jpgChalmers seeks 7 researchers to help build a quantum computer

The challenge ahead – come help us build a quantum computer
“Our goal is to have a functioning quantum computer with at least a hundred qubits.”

Chalmers is launching a new research center – WACQT – with the ambitious goal to build a quantum processor with 100 superconducting quantum bits (qubits). Such a quantum processor can outperform any classical computer when applied to many hard computational problems, e.g. optimization, machine learning, quantum chemistry of molecules, materials science, etc. Having contributed to starting the research field of superconducting quantum circuits (1990s), we are now scaling up our efforts to build a quantum computer. We are hiring 7 researchers to help build a quantum computer – postdocs, research engineers, researchers, and/or senior researchers.

WACQT at Chalmers
The Wallenberg Center for Quantum Technology (WACQT) is a 10-year initiative aimed to bring Swedish academia and industry to the forefront of quantum technology (QT). The four pillars of QT are quantum computing, quantum simulation, quantum communication, and quantum sensing. The center is funded mainly by the Knut and Alice Wallenberg Foundation, with additional contributions from the participating universities and industry. At Chalmers, the main focus is on building a superconducting quantum computer/simulator and to explore useful applications of quantum computing/simulation. As a PhD student within WACQT you will also be part of the WACQT doctoral school, which includes joint courses and summer/winter schools together with PhD students from other universities in the center.

Quantum Technology Lab
WACQT – Wallenberg Center for Quantum Technology
The department of Microtechnology and Nanoscience

We are currently looking for individuals with a variety of backgrounds and expertise – from industry as well as academia – to tackle the challenge of realizing a quantum computer. These roles will involve the development of advanced superconducting devices, hardware, software, methods, and infrastructure required to make the quantum computer reality. The work will be performed in teams with permanent research staff, post-doctoral researchers, and graduate students. Additionally, the project includes collaboration with theoretical physicists and computer scientists.

1. Development of superconducting quantum hardware (1 researcher/engineer)
The performance of the quantum circuits in a quantum processor depends on materials properties, device designs, packaging, and the electromagnetic measurement environment.

We are seeking a researcher/engineer who will develop and optimize our superconducting circuit technology for chips with multiple coupled qubits. The job includes device design, fabrication, process development, packaging, and characterization with dc and microwave techniques at millikelvin temperatures. The eventual goal is to demonstrate a chip with up to 100 coupled qubits, with control circuitry, on which we can run a quantum algorithm. The applicant will develop circuits with a smaller number of qubits, while building towards this goal.

Expertise in micro/nanoelectronic device fabrication and physics or electronics. PhD in Applied Physics, Electrical Engineering, Nanotechnology, or equivalent, or BSc/MSc with significant experience in supercondu ctor device fabrication technology.

Desired experience
Nanotechnology and process development of micro/nanoscale electronic devices, electronics packaging, superconductor technology, fabrication of solid-state devices and quantum devices, device design, numerical simulations, electrical characterization techniques, microwave techniques, and low-temperature techniques.

2. Microwave circuits design (1 researcher/engineer)
The functionality of a multi-qubit quantum processor significantly depends on its electromagnetic environment at microwave frequencies. Important aspects include the signal quality, qubit addressability, signal routing, crosstalk, spurious modes, frequency crowding, attenuation and impedance matching. Producing large multi-qubit circuits requires careful design and simulation of the electromagnetic environment. The devices include planar and integrated circuits, frequency-domain multiplexed resonators for simultaneous measurements of several qubits, cavities, and nonlinear superconducting Josephson junction circuits.

We are seeking a researcher/engineer who will lead the microwave design and modeling, packaging, and testing, as well as contribute to optimizing the ultra-low-noise amplification system.

PhD in Electrical Engineering or equivalent, or BSc/MSc degree with 5 years of relevant experience.

Desired expertise
Analog and non-linear microwave design, amplifiers, numerical simulation, experimental characterization and measurement techniques, cryogenic techniques.

3. Quantum computer operation (2 experimental physicists)
The operation of a quantum processor relies on rapid and very precise control of the qubits, using shaped microwave pulses. It also requires multiplexed, accurate quantum-state measurements, using downconversion and digitization.

We are seeking two researchers on the post-doctoral or senior levels who will develop the high-fidelity control and measurement capabilities required to run quantum algorithms on a superconducting multi-qubit quantum processor (one role is focused on developing quantum control, while the other role is focused on quantum measurement).

PhD in Physics, Applied Physics, Electrical Engineering, or equivalent.

Desired experience
Strong background in experimental quantum computing, microwave quantum optics, or related fields of experimental physics, (quantum) control systems, and microwave electronics.

4. Quantum computer control system (1 researcher/engineer)
Current state-of-the-art control electronics are insufficient for controlling a multi-qubit processor. The deficiencies include the per-channel cost, physical space, synchronization, and pulse-programming speed.

To tackle these problems, we are seeking one experienced researcher/engineer who will develop the scalable electronic measurement system for control and readout of the qubits. This includes the generation of I/Q modulated microwave signals, fast voltage/current pulses for gate/flux control, and the adaptation of data acquisition/feedback electronics. The work will be done in close collaboration with the software and quantum computer operation and control teams.

PhD in Physics, Applied Physics, Electrical Engineering, or equivalent, or BSc/MSc with 5 years of relevant experience in this field.

Desired experience
Strong background in (quantum) control systems, microwave electronics, digital electronics, and/or experimental physics.

5. Quantum control software (1 engineer/researcher)
An integral part of a quantum computer is the control software layer (firmware). This layer translates “quantum-assembler” instructions (gate operations) into pulses, analyzes digitized measurement signals, provides output for automatic control, and stores data for further analysis. In general, only some of these features are currently implemented in existing software solutions. Therefore, this role will feature both the tailoring of these solutions and development of new solutions for the quantum computer. This development is expected to span conventional programming and the implementation of FPGA-based hardware.

We are seeking one software engineer with an interest in quantum computing or one physics/electronics researcher with expertise in software development. The job of the quantum software engineer includes defining and implementing standardized interfaces between control software and hardware, and implementation and testing of the software control environment.

BSc in Electrical Engineering, Applied Physics, or equivalent (although we welcome applicants with a PhD).

Desired expertise
Specialization or experience in real-time systems, automatic control, FPGA programming, electronics, experimental physics.

6. Schrödinger cat states in 3D cavities (1 post-doc/researcher)
Quantum information can be stored in three-dimensional microwave resonator cavities with very long relaxation times. Using superconducting qubits, the information can be encoded into, e.g., Schrödinger-cat states.

We are seeking one experimental post-doc or researcher who will develop and optimize superconducting 3D cavities, and with the help of superconducting qubits generate Schrödinger-cat states. The aim is to set up fast readout with feed-back to counteract the dominant photon loss mechanism.

Expertise in quantum physics, experimental techniques, microwave engineering. PhD in physics or equivalent.

Desired experience: Superconductor technology, design and nanofabrication of solid-state devices and quantum devices, microwave techniques, (microwave) quantum optics, FPGA programming and low-temperature techniques.

All positions require fluency in English, with project progress disseminated through periodic oral presentations and written reports. The applicants should be comfortable to work both independently and collaboratively. The seniority level and terms of employment will scale with the applicant’s experience. For the postdoctoral researcher positions, some teaching and research supervision at the graduate level may be included for the sake of strengthening the individual’s pedagogical qualifications.

Our location
Chalmers is located on the west coast of Sweden. Gothenburg is Sweden’s second largest city with a population of about 1 million people and is often referred to as the "heart of Scandinavia." Gothenburg can offer world-class restaurants, trendy bars, concerts, theatre performances, hockey or football games, fairs and exhibitions. There are also plenty of outdoor adventures to discover. Why not explore the myriads of islands in the archipelago or visit historic forts and castles.

The video below gives an impression what it's like to live and study in Gothenburg.
Live in Gothenburg:

Chalmers continuously strives to be an attractive employer. Equality and diversity are substantial foundations in all activities at Chalmers.

Application procedure
Submit your application as pdf files, marked with Ref 20180062:

CV: (Please name the document: Ref 20170601_Family name_CV)
• CV and list of publications, including the contact information of two reference persons.

Personal letter: (Please name the document: Ref 20170601_Family name_Application)
• 1-3 pages where you introduce yourself and present your qualifications.

Other documents:
• Other optional documents 

Please use the button at the foot of the page to reach the application form. The files may be compressed (zipped).

Application deadline: 18 March, 2018, at the earliest, or until the positions are filled. Applications will be selected continuously.

We look forward to receiving your application!

For questions, please contact:
Associate Professor Jonas Bylander 

Professor Per Delsing

*** Chalmers declines to consider all offers of further announcement publishing or other types of support for the recruiting process in connection with this position. *** 

Chalmers University of Technology conducts research and education in engineering sciences, architecture, technology-related mathematical sciences, natural and nautical sciences, working in close collaboration with industry and society. The strategy for scientific excellence focuses on our eight Areas of Advance; Building Futures, Energy, Information & Communication Technology, Life Science, Materials Science, Nanoscience & Nanotechnology, Production and Transport. The aim is to make an active contribution to a sustainable future using the basic sciences as a foundation and innovation and entrepreneurship as the central driving forces. Chalmers has around 11,000 students and 3,000 employees. New knowledge and improved technology have characterised Chalmers since its foundation in 1829, completely in accordance with the will of William Chalmers and his motto: Avancez!