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Joint PhD position in gravitational-wave astronomy, Milan and Marseille

The University of Milano-Bicocca (Italy) and Aix-Marseille University (France) welcome applications for a joint PhD scholarship in gravitational-wave astronomy. The application deadline is April 17th, 2026 (noon CEST) for positions starting in Fall 2026.

We are seeking highly motivated candidates to join our research in black-hole binary dynamics, gravitational-wave data analysis, and cosmology. Both Milano-Bicocca and Aix-Marseille host large gravitational-wave groups; candidates will benefit from both research environments as well as their broad network of external collaborators.

This joint position will be supervised by Davide Gerosa at Milano-Bicocca and Michele Mancarella at Aix-Marseille. The selected candidate is expected to spend approximately two years in Milan and one year in Marseille, although this arrangement is flexible.

Applications should be submitted through Milano-Bicocca using the link above. The PhD admission program includes several “open scholarships”, covering all research areas in the department (including ours), for which all applicants are automatically considered. Candidates interested in this joint position should explicitly indicate their interest by selecting the “project scholarship” number PROG.5, titled “Interpreting gravitational-wave data with modern inference techniques.”

For more information on our research groups, see www.davidegerosa.com/group and www.cpt.univ-mrs.fr/~mancarella.

Please find here full details and how to apply.

PhD Position Quantum noise limited oscillator for squeezing techniques in Nice

This PhD project focuses on the fabrication and experimental demonstration of a mechanical oscillator whose motion is limited by the quantum radiation-pressure noise from a laser beam.  Application deadline: April 26th 2026. 

The oscillator will consist of an ultra-light mirror, with a mass of approximately 100 mg, suspended as a microscopic pendulum by two fused-silica fibers thinner than a human hair. The mirror will be integrated into a suspended optical cavity designed to enhance the quantum fluctuations of the laser field. The motion of the mirror will be measured with high precision using dedicated techniques. After demonstrating quantum-noise-limited motion, the system will serve as a platform to demonstrate novel methods for surpassing quantum noise limits in optical measurements.

The PhD candidate will play an active role in the fabrication of the suspended mirror using the Artemis laboratory’s dedicated facilities. This work includes pulling ultra-thin fused-silica fibers, welding them to a custom mirror substrate, and characterizing their thermal noise. Initial fabrication results are expected to happen within the first year of project and lead to a first publication.

The second phase of the thesis will focus on assembling the suspended optical cavity, measuring the thermal-noise properties of the mirror, and optimizing the system for quantum-noise sensing experiments.

Throughout the project, the student will acquire strong experimental skills essential to modern precision physics, including optical alignment, cavity design and control, laser frequency stabilization, feedback electronics, vacuum technology, quantum-noise modeling, and low-noise detection techniques. The outcomes of this research are directly relevant to high-precision measurement technologies, including next-generation gravitational-wave detectors and the generation of strong bright squeezed light.

The student will be based at the Artemis laboratory, located at the Mont-Gros site of the Observatoire de la Côte d’Azur in Nice, France. He/She will work within the Lasers and Cavities group and benefit from close supervision by permanent researchers, as well as support in mechanical and electronic engineers. The candidate will join an internationally connected research environment, contribute to publications, present results at conferences, and participate in the Einstein Telescope collaboration.

Keywords
Optomechanics, Pendulum mirror, Bright squeezing, Quantum noise Mitigation

Profile and skills required
The candidate should hold a Master’s degree in Physics, with a solid background in optics. Experience in experimental physics is highly desirable but not strictly required. We seek a candidate with a strong motivation to develop hands-on laboratory skills and that can work well in autonomy within a team.

Please find here full details.

PhD Fellowship in Particle Astrophysics and Multi-messenger Astrophysics at NBI Copenhagen

Expressions of interest are invited for PhD Fellowships in Particle Astrophysics and Multi-messenger Astrophysics to be held within the AstroNu Group led by Prof. Tamborra at the Niels Bohr International Academy and DARK. The foreseen appointment is for a fixed period of three years with a starting date in fall 2026. Application deadline May 1st 2026.

We seek highly motivated, outstanding individuals eager to join an ambitious research program at the intersection of particle astrophysics, nuclear astrophysics, transient astrophysics, and multi-messenger astrophysics. Preliminary expertise in neutrino transport, (magneto)hydrodynamic simulations of astrophysical sources, nucleosynthesis, particle acceleration in astrophysical sources, modeling of multi-messenger emission from cosmic sources, and/or high-performance computing will be considered valuable assets.

The Niels Bohr International Academy is a young initiative committed to fostering the traditions of internationalism, interdisciplinarity and excellence in physics, which characterize the Niels Bohr Institute. It functions as a primary center for fundamental research including theoretical and computational astrophysics, particle astrophysics, gravitational physics, high energy particle physics, quantum physics, and biophysics. Areas of research of the DARK Center at the Niels Bohr Institute include, but are not limited to: observations, multi-messenger transient astronomy, high-redshift galaxies, dark matter and dark energy, black holes, and cosmic dust.

The University of Copenhagen wishes to reflect the diversity of society and welcomes applications from all qualified candidates regardless of personal background. The primary criterion for the evaluation of candidates is the excellence of their track record and future promise.
To guarantee full consideration, the requested material should be uploaded before May 1, 2026. For inquiries, kindly write at nbia(at)nbi.ku.dk, with email subject “PhD Fellowship in Particle Astrophysics and Multi-messenger Astrophysics, UCPH-NBIA-PHD_RFNU.”

Please find here full details.

Postdoc and PhD openings at the new German Center for Astrophysics (DZA) in multi-messenger & gravitational wave astrophysics

Five new postdoc (application deadline: May 8th 2026) and PhD (deadline extended to 19/4/2026) positions  at the new German Center for Astrophysics (DZA), spanning key areas in multi-messenger and gravitational wave astrophysics, across both theory, data analysis and observations.

The DZA is a newly established and rapidly growing centre in the beautiful city of Görlitz in the eastern part of Germany. The positions offer a unique and exciting environment to contribute and to help shape the future of multi-messenger astrophysics in Europe and internationally, with strong links to major current and next generation gravitational wave and time-domain facilities in the optical and radio.

Further details and application links can be found:

https://aas.org/jobregister/ad/7165c08b (deadline extended to 19/4/2026)
https://aas.org/jobregister/ad/b633f60c

Gravitational Wave Cosmology: From Theory to Experiments in Swansea

This PhD studentship offers the chance to develop an ambitious research project at the interface of theory and experiment in gravitational-wave physics and cosmology. Working closely with experienced faculty, the student will explore fundamental questions about the Early Universe and the dark sector, which together shape most of the cosmos we observe today. Many of the most compelling models in these areas predict stochastic backgrounds of gravitational waves—signals that may be detected by current and next-generation experiments. Applcation deadline: April 6th 2026.

The successful candidate will:

  • Develop and test theoretical models of the Early Universe and dark sector physics.
  • Make quantitative predictions for gravitational-wave signals.
  • Connect theory with observational or simulated data from leading international collaborations.

Through active mentorship and collaboration, the student will have the opportunity to engage with major international projects, including Laser Interferometer Space Antenna (LISA), Einstein Telescope, Square Kilometre Array Observatory (SKAO), and NANOGrav. This involvement will enable the student to become part of vibrant, international research teams at the forefront of discovery.

This is an outstanding opportunity for a motivated student to contribute to some of the most exciting questions in modern physics, gain high-level research training, and build an international scientific profile in a rapidly advancing field.

Please find here details.

PhD Fellowship in Physics or Computer Science for the LISA gravitaional-wave Mission in Stavanger

The University of Stavanger invites applications for a PhD Fellowship in Physics or Computer Science within the LISA gravitational-wave mission. Application deadline: April 9th, 2026.

The University of Stavanger invites applications for a PhD Fellowship in Physics or Computer Science within the LISA gravitational-wave mission.

The PhD candidate will work on one or both of the following research areas, depending on their background and interests:

  • Development and deployment of Norway’s computational facility for the LISA ground segment.
  • Development and implementation of global-fit components for analyzing the stochastic gravitational-wave background within the LISA Framework

The work will be carried out within the LISA team of the University of Stavanger in tight collaboration with the international LISA groups.

The position is offered under the standard Norwegian state-employee contract, providing excellent working conditions and benefits.

Details on the job description, contract and other relevant information can be found on the application portal (link).

Contact: Nardini, Germano (for the scientific aspects of the fellowship) (germano.nardini(at)uis.no); Rosa C. Andrade (for the formal and technical aspects of the application)aspects of the position) (rosa.c.andrade(at)uis.no)

Please find here details.

PhD positions in GW instrumentation and data Analysis in Ghent

The Ghent Gravity Group is seeking applications for PhD positions in gravitational-wave (GW) instrumentation and data analysis. Members of the group are involved with Virgo instrumentation, LIGO-Virgo-KAGRA (LVK) data analysis, and Observational Science with the Einstein Telescope (ET). The group is well-embedded in the Virgo / LVK Collaborations (we are already in VirgoLab and are expecting to join IGWN) and Ghent University is also one of the initial members of the Einstein Telescope Collaboration. Moreover Ghent University is a founding partner of the ETpathfinder project, and members of the group take part in the instrumentation developments related to this facility in Maastricht. The group is led by Prof. Archisman Ghosh, and its instrumentation activities are currently overseen by Dr. Daniela Pascucci. Dr. Matthias Vereecken is an independent postdoctoral fellow with a research line in multimessenger transients and neutrino-triggered searches, and another instrumentation postdoc is expected to join the group soon. 

We are looking for candidates with the following profiles:

GW instrumentation (optics): Motivation and experience with hands-on experimental work in a laboratory (required). Familiarity with GW interferometry simulation software such as Finesse and/or Oscar (desired). The research focus will be on Virgo calibration using scattered light. The candidate will also carry out ETpathfinder / ET optics R&D.
GW data analysis: Motivation and experience with data analysis work in context of GW sciences (required). Familiarity with LVK detector characterization / search / parameter inference pipelines (desired). The research focus will be on development of data analysis techniques for 3G detectors. Participation in LVK/IGWN data analysis work is also expected.

We will fill one or both of the above positions depending on the availability of suitable candidates.

Candidates should have a masters degree in the Physical Sciences or Engineering. Applications should include: (i) a statement of interest (up to two pages), (ii) a brief academic CV, (iii) a list of grades, (iv) title and abstract of masters thesis (if applicable), and additionally (v) two letters of reference (to be sent directly by the referees). Applications including letters of reference are to be sent to gravity@ugent.be.

The deadline for applications is 31 March 2026. We will interview the shortlisted candidates in April / early May and expect to announce the results by May. The position is expected to begin on 01 September 2026 or soon afterwards. PhD positions in Belgium are for a duration of 4 years.

Please find here details.

Postdoctoral Researcher in Gravitational-Wave and Multi-Messenger Astronomy (f/m/d) at DZA

The following positions are to be filled (4 Postdoctoral Researcher positions) starting 1 September 2026 and are limited to 3 years in accordance with the German Act on Fixed-Term Employment Contracts in Academia (WissZeitVG):
Postdoctoral Researcher in Gravitational-Wave and Multi-Messenger Astronomy (f/m/d)

(Depending on personal qualifications, up to pay grade E 13 according to the German federal pay scale – TVöD Bund)

YOUR TASKS:

  • Conduct independent research in the field of gravitational-wave and multi-messenger astrophysics
  • Work on topics such as r-process nucleosynthesis and kilonova modelling, massive black hole mergers and their electromagnetic counterparts in the LISA era, gravitational-wave data analysis, and AI-driven inference including primordial black hole science
  • Depending on the topic:
  • contribute to time-domain discovery and follow-up of compact object mergers using facilities such as ZTF, LSST, DSA-2000, and SKA
  • develop and apply advanced computational and data analysis methods, including machine learning approaches
  • participate in the analysis of data from current gravitational-wave detectors (LIGO, Virgo, KAGRA) and contribute to the preparation of future facilities such as the Einstein Telescope (ET) and LISA
  • develop simulations, models, and data-processing pipelines in areas such as computational astrophysics, radiative-transfer simulations, accretion physics, survey astronomy, or gravitational-wave analysis
  • Publish research results in peer-reviewed international journals
  • Present research results at leading international conferences and workshops

REQUIREMENTS:

  • PhD in Physics, Astronomy, Astrophysics, or a closely related field
  • Strong publication record in peer-reviewed international journals
  • Demonstrated excellent research and analytical skills
  • Research experience in gravitational-wave astronomy, multi-messenger astrophysics, or time-domain astronomy is highly desirable
  • Experience in scientific programming, e.g. Python or C++
  • Expertise in one or more of the following areas is particularly welcome:
  • computational astrophysics
  • radiative-transfer simulations
  • accretion physics
  • machine learning and AI methods
  • survey astronomy
  • gravitational-wave data analysis
  • Experience working in international research collaborations and interdisciplinary environments is an advantage
  • Excellent scientific writing and presentation skills
  • Strong interest in science communication and collaborative research
  • Very good English communication skills (spoken and written)
  • Ability to work independently while contributing effectively to a team-oriented international research environment

WE OFFER:

  • The opportunity to help build the largest astrophysics research centre in Germany
  • A challenging and diverse scientific position in an international research environment
  • The opportunity to actively contribute to the scientific development of the DZA in Upper Lusatia
  • An interdisciplinary, collegial, and research-oriented team
  • Remuneration according to the TVöD Bund (E 13), including annual bonus and other public service benefits
  • Flexible working hours, family-friendly conditions, and options for part-time employment

The DZA strives to increase the proportion of women in its workforce and therefore expressly encourages women to apply. Applications from people with severe disabilities are also particularly welcome. If equally qualified, these applicants or those who are legally equivalent to them under SGB IX will be given preference in hiring.

Please apply via our online application portal by 8 May 2026. Please upload your detailed application documents (cover letter, detailed CV, copies of certificate, a statement regarding proposed research (3 pages max), a statement about previous research (2 pages max), the names and contact details (email) of three reference letter writers and possible starting date) there, quoting the job reference A03-26-02.

Please find here full details.

PhD position in Theoretical Physics at University of Murcia

We expect to open one funded PhD position in theoretical physics at the University of Murcia (Spain). Application deadline: April 15 2026.

We expect to open one funded PhD position in theoretical physics at the University of Murcia (Spain).
We are seeking students interested in gravitational physics, with research topics including black holes, gravitational waves, and modifications of General Relativity. The position is funded for four years, in accordance with the Spanish Law of Science. The expected start date is September 1st 2026.
The successful candidate will join the research group of Prof. Pablo A. Cano within the ERC-funded project “EFTGrav”. The project aims to characterize the gravitational-wave signatures of beyond-GR theories in black hole binaries.

Applicants should send directly to pablocano(at)um.es the following documents: a CV, academic transcripts, a brief statement of research interests, and the contact details for two referees who could provide reference letters.

Important condition: candidates must hold a Master’s degree or expect to obtain it before the start date.

Please find here full details.

PhD positions in the field of Gravitational-Waves Theory and Numerical Relativity in Jena

The Institute of Theoretical Physics at the Faculty of Physics and Astronomy has a vacancy for two
PhD positions in the field of
gravitational-waves and numerical relativity (theory)
commencing on August, 1. 2026
We offer a part-time position (50%, 20 hours per week)
The Gravitational-wave and Numerical relativity Working Group investigates questions relating to gravitational waves from compact binaries, relativistic and multimessenger astrophysics, and numerical methods for Einstein equations and relativistic fluids.

Your responsibilities:

  • Working on your own scientific qualification project (doctorate)
  • Conducting research projects in the field of gravitational theory with reference to gravitational-wave modeling, relativistic astrophysics and numerical relativity
  • Co-supervising bachelor’s and master’s students
  • Teaching in bachelor’s and master’s programs to the extent of 2 LVS

Your profile:

  • A completed master’s degree in physics with a thesis in theoretical physics and/or computational physics
  • We require in-depth knowledge of theoretical physics; knowledge of relativity theory is essential; Previous experience in the areas of gravitational-wave theory/modeling, multi-messenger astrophysics with compact objects, and/or astrophysical computer simulations is desirable
  • Ability to work independently and organizational skills

We offer:

  • Interesting work at an international level and participation in international conferences
  • A graduate academy for doctoral students
  • Remuneration based on the provisions of the Collective Agreement for the Public Sector of the Federal States (TV-L) at salary scale E13 50%, including a special annual payment in accordance with the collective agreement
  • 30 days of vacation per calendar year plus two days off on December 24 and 31An exciting/varied/interesting field of employment / Autonomous work at one of the largest employers in Thuringia / An exciting and varied scope of activities with creative freedom
  • A family-friendly working environment with a variety of offers for families: University Family Office ‘JUniFamilie’ and flexible childcare (‘JUniKinder)

The position is a fixed-term position initially limited for three years; an extension is possible.

Candidates with severe disabilities will be given preference in the case of equal qualifications and suitability.

Are you eager to work for us? Then apply by May 1st, 2026 using our online form.

Please find here full details.