Job description
Background of the recruitment and description of the project
Development of entangled photon source, quantum memory, frequency stabilization, and link (connection) systems for quantum repeaters
Work content and job description
As a Research Scientist at LQUOM, Inc., you will engage in the development of quantum communication systems and related applications through a collaborative research project with the Horikiri Laboratory, Faculty of Engineering, Yokohama National University. We are seeking talented and motivated individuals who are passionate about translating cutting-edge research achievements into real-world technologies and societal impact.
Examples of Research Topics
Candidates are expected to possess expertise in one or more of the following areas:
**Development of optical systems**, including quantum memories based on rare-earth-ion-doped crystals, entangled-photon sources, and laser phase-locking technologies.
**Development of digital and analog control systems** to improve the stability, reliability, and performance of optical systems.
**Miniaturization and modularization of quantum repeaters** for practical quantum communication networks.
**Theoretical research on quantum repeater protocols and performance enhancement**, including the design and analysis of next-generation quantum repeater architectures.
**Theoretical investigation of implementation methods for quantum communication applications**, such as quantum key distribution (QKD) and distributed quantum computing.
Assigned department
Existing departments
R&D
Job type
- Researcher/Postdoc level
- R&D/Engineer
Research field
Nanotechnology/Materials - Optical engineering and photon science
Natural Science - Semiconductors, optical properties of condensed matter and atomic physics
Informatics - Information network
Manufacturing Technology - Communication and network engineering
Others - Others
Quantum Information Science, Quantum Physics, Cryogenic Physics (Rare-Earth Materials), Laser Physics, and Spectroscopy
Wages
Researcher/Postdoc level
Annual Salary : 6 million yen ~ 15 million yen
Compensation will be determined based on skill level.
Candidates who meet the required qualifications and possess at least one of the preferred skills can expect an annual salary of JPY 6 million or more.
Candidates with a Ph.D. can expect an annual salary of JPY 8 million or more.
The expected annual salary of a recent successful candidate was JPY 12 million (early 30s, international student, Ph.D. holder).R&D/Engineer
Annual Salary : 6 million yen ~ 15 million yen
Compensation will be determined based on skill level.
Candidates who meet the required qualifications and possess at least one of the preferred skills can expect an annual salary of JPY 6 million or more.
Candidates with a Ph.D. can expect an annual salary of JPY 8 million or more.
The expected annual salary of a recent successful candidate was JPY 12 million (early 30s, international student, Ph.D. holder).
Working hours
Researcher/Postdoc level
Working hours :09:00-18:00
Holidays : 120 annual holidays
Breakdown:
Full two-day weekend system (Saturday and Sunday)
National holidays
Other leave (year-end/New Year holidays, bereavement and congratulatory leave)Paid annual leave: 15 days granted upon joining the company.
Overtime and other explanations : Flexible working hours (Core hours: 1:00 PM–4:00 PM)
R&D/Engineer
Working hours :09:00-18:00
Holidays : 120 annual holidays
Breakdown:
Full two-day weekend system (Saturday and Sunday)
National holidays
Other leave (year-end/New Year holidays, bereavement and congratulatory leave)Paid annual leave: 15 days granted upon joining the company.
Overtime and other explanations : Flexible working hours (Core hours: 1:00 PM–4:00 PM)
Application requirements
Qualifications
Education and Degree Requirements
Ph.D. / Doctor / Master
Required Qualifications
Candidates must possess expertise in at least one of the following areas:
* Quantum technologies (experimental or theoretical)
* Optical, materials science, or communication experiments involving lasers
* Development of integrated measurement and control systems combining multiple instruments (systems engineering)Preferred Qualifications
Experimental Research
* Implementation and commercialization of proof-of-concept technologies
* Selection and evaluation of linear optical components
* Ph.D. in Optics, Photonics, or a related field
* Ph.D. in Spectroscopy or a related field
* Atomic, Molecular, and Optical (AMO) Physics
* Interferometers and optical cavities
* Nonlinear optics (χ² processes)
* Quantum memories
* Photonic crystals
* Time-Correlated Single Photon Counting (TCSPC)
* Laser stabilization and phase-locking techniques
* Design and construction of magnetic field generation systems (e.g., Helmholtz coils)
* Materials characterization and experiments using electric and magnetic fields
* Cryogenic systems (~3–4 K)
* Vibration isolation and suppression techniques
* Feedback control systems (e.g., PID, OPLL)
* FPGA and DSP development
* ASIC design and development
* Analog circuit design
* Equipment modularization and miniaturization
* Mechanical design using 3D CAD
* Technical specification development and documentation
* Team leadership and project management experienceTheoretical Research
* Theoretical studies of quantum memory materials (e.g., rare-earth-ion-doped crystals)
* Quantum information theory
* Quantum communication protocols
* Implementation methodologies for quantum key distribution (QKD) and distributed quantum computingWork experience
Examples of Research Areas
Candidates with expertise in one or more of the following areas are highly desirable:
**Development of optical systems**, including quantum memories based on rare-earth-ion-doped crystals, entangled-photon sources, and laser phase-locking technologies.
**Development of digital and analog control systems** for improving the stability, reliability, and performance of optical systems.
**Miniaturization and modularization of quantum repeaters** for practical deployment in quantum communication networks.
**Theoretical research on quantum repeater protocols and performance enhancement**, including the design and optimization of quantum repeater architectures.
**Theoretical studies on the implementation of quantum communication applications**, such as quantum key distribution (QKD) and distributed quantum computing.
Employment Type
Researcher/Postdoc level
Regular employee
R&D/Engineer
Regular employee
Contract period
Researcher/Postdoc level
Tenured - Non-tenure track
Probationary period present
3 months (No changes to employment conditions during the probationary period)
R&D/Engineer
Tenured - Non-tenure track
Probationary period present
3 months (No changes to employment conditions during the probationary period)
Work location
240-8501 Kanagawa Yokohama National University 79-1 Tokiwadai, Hodogaya-ku Yokohama-shi, Kanagawa, Japan KBIC 7-7 Shinkawasaki, Saiwai-ku Kawasaki-shi, Kanagawa, Japan
When establishing a new office, its address
Compensation
Various systems
Bonus : Performance-based bonus (paid in the current fiscal year).
Transportation expenses : available
Others : Benefits & Welfare
Comprehensive social insurance coverage
Communication allowance
Training and professional development programs
Referral bonus program (employee referral scheme)
Relocation assistance program
Regular health checkups
Influenza vaccination subsidy
Social event/employee gathering subsidy
Laptop selection program
Casual dress code
Remote work available
Access to various services provided by the VC Startup Health Insurance Association
Childcare leave program available (including proven uptake by male employees)Company-Leased Housing Program
Under this program, the company signs the lease for the employee's primary residence and subleases the property to the employee.
Specifically, 50% of the rent is treated as an in-kind benefit and deducted from the employee's base salary, while the remaining 50% is deducted from payroll.
This arrangement reduces social insurance premiums, resulting in a higher effective take-home pay.Please note that some programs are subject to company policies and eligibility requirements.
Insurance
Employees' Health Insurance : available
Employees' Pension Insurance : available
Worker's accident insurance : available
Employment insurance : available
Application Considerations
Number of hired
5 person(s)
Application period
- 2026/06/23~2027/06/23 Deadline for receipt
Application method
Attached documents
Application Form : Online Submission
Please include your name, phone number, email address, photograph, educational background, and work experience. Any additional information may be provided in a format of your choice.
Achievements and Activities : Online Submission
Please provide a list of your major publications, conference presentations, and a summary of your research experience in a format of your choice.
Return of application documents
We will dispose of all application documents responsibly.
URL of this job posting
Selection / Notification of result
Selection
In principle, interviews will be conducted online after screening of documents.
Notification of result
In principle, we will contact you by e-mail.
Contact details
LQUOM, Inc.
Corporate
Recruitment staff
recruiting(at)lquom.com
* Please change (at) to @ and send it.
As a researcher at LQUOM, Inc., you will engage in the development of quantum communication systems and their applications through a collaborative research project with the Horikiri Laboratory, Faculty of Engineering, Yokohama National University. We are seeking talented individuals who are passionate about bringing cutting-edge research成果 into practical real-world implementation and creating social impact.
Notes
Please indicate that you learned about this position through the JREC-IN job posting when submitting your application.
