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Seeking a few Technical staff I (W20248)


Theoretical Quantum Physics Laboratory,
RIKEN Cluster for Pioneering Research
(Laboratory head: Franco Nori, Chief Scientist)

Research Field

The main goal of this position is to significantly advance and improve the software we initially developed here, called QuTiP (Quantum Toolbox in Python). This software is described in great detail in its web site.
QuTiP is open-source software for simulating the dynamics of open quantum systems. The QuTiP library depends on the excellent Numpy, Scipy, and Cython numerical packages. In addition, graphical output is provided by Matplotlib. QuTiP aims to provide user-friendly and efficient numerical simulations of a wide variety of Hamiltonians, including those with arbitrary time-dependence, commonly found in a wide range of physics applications such as quantum optics, trapped ions, superconducting circuits, and quantum nanomechanical resonators.
The top priorities of our research group are now: (1) quantum computing using superconducting qubits, (2) quantum information processing, (3) coherent Ising machines, as well as (4) neural networks and machine learning applied to quantum physics.
Candidates with prior experience in these topics will have priority.
We perform interdisciplinary research in theoretical quantum information processing, atomic physics, quantum optics, condensed matter physics, nanoscience, and computational physics. We are also studying hybrid quantum electro-mechanical systems, optomechanics, nano-mechanics, quantum nano-electronics, and quantum simulations. Particular emphasis is being placed on quantum computing using superconducting Josephson-junction qubits, scalable quantum circuitry and improved designs for their quantum control. An underlying theme of our work is to better understand nano-scale quantum systems and devise methods to control them. We use physical models to make predictions that can be tested experimentally and that can be used to better understand the observed phenomena.
Our publications are available online at Publications | Theoretical Quantum Physics Laboratory website.

Job title and Job description

Job title, available positions

Technical Staff I: a few positions

Job description

The Theoretical Quantum Physics Laboratory is seeking technical staff who will help to improve and extend the capabilities of our software QuTiP. This will also contribute to on-going research activities briefly summarized in the “Area of Research” listed above.


Applicants must have and relevant experience in coding, programming, in the context of quantum physics. Also, excellent written and verbal communication skills in English are required.

Work location

Branch and address

RIKEN Wako (2-1 Hirosawa, Wako, Saitama 351-0198)

Salary and benefits

  • 1.One-year fixed-term employment contract, renewable based on evaluation, up to the end of March 2025 from date of hire.
  • 2.RIKEN may adjust the above maximum period of renewability based on a) the employee’s abilities, work load at the time of contract completion, performance and work attitude and b) the continuation of the employee’s center, laboratory or project and RIKEN’s management situation and budget at the time. In principle, employment contracts will not be renewed for individuals older than 65 years.
  • 3.The employee’s period of fixed-term employment cannot exceed 10 years from the initial date of hire (or 10 years from April 1, 2013 for fixed-term employees already at RIKEN prior to this date).

In principle, the first two months of employment is considered a trial period.
Salary will be commensurate with qualifications and experience. Commuting and housing allowances will be provided. Social insurance will be applied. Mandatory membership in the RIKEN Mutual Benefit Society (RIKEN Kyosaikai).
This position falls under the specialized duties discretionary work system; one working day will be calculated as 7 hours and 30 minutes.

Days off include public holidays, New Year's holidays (Dec. 29 - Jan 3), and RIKEN Foundation Day.
RIKEN has introduced telework as a temporary and special measure to prevent the spread of COVID-19. You may be asked to work from home according to the instructions of the institute. You can also choose to work from home with the permission of your supervisor.
No smoking on site (designated smoking areas available).
These and other provisions are in accordance with RIKEN regulations.

RIKEN is promoting a Gender Equality Program by taking various measures to create a workplace where both men and women are able to give full rein to their talents and abilities. When applicants are judged to be equally qualified on the basis of fair and impartial criteria, women applicants will be given preference.

Also, eligible for an exemption from repayment for category 1 scholarship loans provided by the Japan Student Services Organization before fiscal year 2003, and eligible applying for the MEXT Grants-in-Aid for Scientific Research (Kakenhi).

Application and required documents

Required documents

  • 1.Complete CV or CV (with photo and email address)

    *Write the RIKEN job ad number “W20248”, indicated in the parentheses next to the job title, in the RIKEN job ad number section in the upper right corner of your CV.

  • 2.List of research achievement and publications
  • 3.A letter of recommendation from the current supervisor (If unavailable, a letter from a substitute reference will be acceptable.)
  • 4.Consent form for handling personal information based on GDPR
    If you are a resident of the European Economic Area (EEA), you are required to submit the document, "Consent form for handling personal information based on GDPR" with your signature.

    *You will find detailed information about General Data Protection Regulation (GDPR) on the following website:
    Data protection | European Commission

How to apply

Send the PDF formatted application by email to applications-physics [at] ml.riken.jp
(Recommendation letters must be emailed directly from the reference to applications-physics [at] ml.riken.jp)

Note: Application documents will not be returned.


Open until the position is filled

Handling Personal Data

Submitted documents are strictly protected under the RIKEN Privacy Policy and will be used only for the purpose of applicant screening. Personal information will not be disclosed, transferred or loaned to a third party under any circumstances without just cause.

Selection process

Application screening and interview for selected applicants. If you do not hear back from us, this means that your application was not selected. Due to the large number of applications typically received, we cannot reply to each single applicant.

Start of Employment

This is flexible, upon mutual agreement.

Contact Information / Send application to

Ai SATO (Ms.)
Theoretical Quantum Physics Laboratory
RIKEN Cluster for Pioneering Research
2-1 Hirosawa, Wako, Saitama 351-0198
Email: applications-physics [at] ml.riken.jp
For inquiries, please send an email.