Postdoctoral Fellow in Physics (Stockholm University)

Department of Physics, Stockholm University The Department of Physics is one of the largest departments within the Faculty of Science at Stockholm University and conducts a wide range of basic research in experimental and theoretical physics. The department has approximately 250 employees, 95 of whom are doctoral students. Many are recruited internationally. Fysikum is part of the AlbaNova University Centre, which also houses the Department of Astronomy, the physics departments at the Royal Institute of Technology (KTH), and the Nordic Institute for Theoretical Physics (Nordita). Fysikum and Stockholm University are affiliated with the Stockholm Dual Career Network (SDCN), which offers expat partners professional events, career support and opportunities to build networks in their new home city: www.sdcn.se. You can find more information about us here: Department of Physics. Project Description The position is associated with rare event searches with XENONnT and preparation for the next generation rare event observatory XLZD. XENONnT is a dual-phase liquid xenon TPC at LNGS with a 5.9-tonne active mass, optimized for WIMP detection with sensitivity to spin-independent cross sections down to ~10⁻⁴⁸ cm². Its low backgrounds and improved calibration enable searches for low-energy electronic recoils from axions, dark photons, and other BSM candidates. The detector also probes CEνNS and sets limits on the neutrino magnetic moment and axion-electron couplings. XENONnT is part of the XLZD consortium, which aims to merge the expertise of the XENON, LUX-ZEPLIN, and DARWIN collaborations to realize a next-generation dark matter observatory. Main Responsibilities The postdoctoral candidate is expected to focus on: Statistical data analysis including machine learning Monte Carlo simulations Operations and calibration of the XENONnT detector Potential involvement in the testing, characterization, and development of photosensors Qualification Requirements To qualify for this postdoctoral position, applicants must: Hold a Swedish doctoral degree in a relevant subject or an equivalent degree from another country Have their degree completed by the time of hiring decision Assessment Criteria Preference is given if the degree was completed within the last three years before the application deadline An older degree may be considered under special circumstances (e.g. parental leave, sick leave, etc.) Special emphasis is placed on demonstrated research skills About the Employment Full-time position (100%) Duration: Minimum of 2 years and maximum of 3 years Possible extension under special circumstances Start date: As per agreement We Offer At Stockholm University, you will experience the dynamic interaction between higher education and research in an exciting and creative environment. You will work in an international setting with excellent working conditions. The university is located in the National City Park with good transport links to the city. Stockholm University strives to be a workplace free from discrimination and with equal opportunities for all. Contact For further information, contact: Professor Jan Conrad Phone: +46 8 553 787 69 Email: conrad@fysik.su.se Application Apply for the position via Stockholm University's recruitment system. Attach a personal letter, CV, and any requested documents. The applicant is responsible for ensuring the application is complete and submitted before the deadline. Instructions for applicants: How to apply for a position Stockholm University contributes to the development of sustainable democratic society through knowledge, enlightenment and the pursuit of truth. Position Details Type of employment: Temporary position Contract type: Full-time Salary: Individual salary setting Number of positions: 1 Full-time equivalent: 100% Location: Stockholm, Sweden Reference number: SU FV-4042-25 Union Representatives: ST/OFR: st@st.su.se Saco-S: saco@saco.su.se Seko: seko@seko.su.se Published: 14 November 2025 Application deadline: 19 December 2025 If you apply for this position please say you saw it on Academicoxy

Department of Physics, Stockholm University

The Department of Physics is one of the largest departments within the Faculty of Science at Stockholm University and conducts a wide range of basic research in experimental and theoretical physics. The department has approximately 250 employees, 95 of whom are doctoral students. Many are recruited internationally. Fysikum is part of the AlbaNova University Centre, which also houses the Department of Astronomy, the physics departments at the Royal Institute of Technology (KTH), and the Nordic Institute for Theoretical Physics (Nordita).

Fysikum and Stockholm University are affiliated with the Stockholm Dual Career Network (SDCN), which offers expat partners professional events, career support and opportunities to build networks in their new home city: www.sdcn.se.

You can find more information about us here: Department of Physics.

Project Description

The position is associated with rare event searches with XENONnT and preparation for the next generation rare event observatory XLZD. XENONnT is a dual-phase liquid xenon TPC at LNGS with a 5.9-tonne active mass, optimized for WIMP detection with sensitivity to spin-independent cross sections down to ~10⁻⁴⁸ cm². Its low backgrounds and improved calibration enable searches for low-energy electronic recoils from axions, dark photons, and other BSM candidates. The detector also probes CEνNS and sets limits on the neutrino magnetic moment and axion-electron couplings. XENONnT is part of the XLZD consortium, which aims to merge the expertise of the XENON, LUX-ZEPLIN, and DARWIN collaborations to realize a next-generation dark matter observatory.

Main Responsibilities

The postdoctoral candidate is expected to focus on:

Statistical data analysis including machine learning
Monte Carlo simulations
Operations and calibration of the XENONnT detector
Potential involvement in the testing, characterization, and development of photosensors

Qualification Requirements

To qualify for this postdoctoral position, applicants must:

Hold a Swedish doctoral degree in a relevant subject or an equivalent degree from another country
Have their degree completed by the time of hiring decision

Assessment Criteria

Preference is given if the degree was completed within the last three years before the application deadline
An older degree may be considered under special circumstances (e.g. parental leave, sick leave, etc.)
Special emphasis is placed on demonstrated research skills

About the Employment

Full-time position (100%)
Duration: Minimum of 2 years and maximum of 3 years
Possible extension under special circumstances
Start date: As per agreement

We Offer

At Stockholm University, you will experience the dynamic interaction between higher education and research in an exciting and creative environment. You will work in an international setting with excellent working conditions. The university is located in the National City Park with good transport links to the city.

Stockholm University strives to be a workplace free from discrimination and with equal opportunities for all.

Contact

For further information, contact:

Professor Jan Conrad
Phone: +46 8 553 787 69
Email: conrad@fysik.su.se

Application

Apply for the position via Stockholm University's recruitment system. Attach a personal letter, CV, and any requested documents. The applicant is responsible for ensuring the application is complete and submitted before the deadline.

Instructions for applicants: How to apply for a position

Stockholm University contributes to the development of sustainable democratic society through knowledge, enlightenment and the pursuit of truth.

Position Details