Job offers

Non-linear parametric resonator arrays and spectroscopy of strongly coupled cavity-QED materials

Destination: Institute of Fundamental Physics (IFF-CSIC, Madrid)
Deadline: 12/12/2025

Job offer for a postdoctoral position at the Institute of Fundamental Physics (IFF–CSIC, Madrid) within the QUINFOG group, to work on non-linear parametric resonator arrays and spectroscopy of strongly coupled cavity-QED materials.

The project explores quantum light–matter interfaces in solid-state platforms (superconducting and semiconducting systems), with emphasis on nonlinear, topological, and many-body effects relevant for quantum technologies.

We seek candidates with a solid background in quantum optics and/or condensed matter theory, familiar with modelling driven-dissipative systems and numerical or analytical techniques.

📍 Duration: 1.5 years 💶 Salary: €2718 gross/month 🕒 Start: Flexible / ASAP
📅 Deadline: 12 December 2025 (applications reviewed as received).
Stimulating and collaborative scientific environment, and assistance in applying for further funding opportunities once integrated into the group.

Project funded by the national project PID2023- 146531NA-I00 led by the PIs: Álvaro Gómez-León (a.gomez.leon@csic.es) and Tomás Ramos (tomas.ramos@csic.es).

All details on the job offer, project description, and application process are found in this link: https://quinfog.hbar.es/wp-content/uploads/2025/10/Postdoctoral-contract-offer.pdf

Post-doc position

Destination: Instituto de Física Fundamental-CSIC
Deadline: 31/12/2025

Our group has funding for post-doc funding for 2026-2027 from the projects “Nanophotonic-based Quantum Simulation and sensing” from Fundación BBVA and national projects from Alejandro González Tudela.

The potential topics to work with are many-body quantum optics, design of analogue and programmable quantum simulators for relevant many-body physics problems, waveguide QED, or quantum nanophotonics, among other topics. See my webpage for more details on the potential topics we are working on lately. Potential collaborators are: Carlos Sánchez Muñoz, Alejandro Manjavacas, Daniel González Cuadra, and others member of the QUINFOG group.

We offer up to two years of post-doc contract with approximately 2k€ netto. Besides, QUINFOG’s group offers a stimulating and collaborative atmosphere, a strong network of national and international collaborators.

Interested candidates can send their CV’s to a.gonzalez.tudela@csic.es, with the subject “Post-doc position”. Optionally, they can ask up to two colleagues to send recommendation letters to the same e-mail and with the same subject.

Applications will be considered as they are received, until 31st December 2025. Early applications are encouraged, although the starting date is flexible in the year 2026.

Contact the PI for questions or more information.

Superconducting qubits as sensors of fundamental physics

Destination: IFAE
Deadline: 31/12/2025

Superconducting qubits are the leading candidate platform on which to build quantum

processors owing to a continuous development of many fronts of the technology: enhanced
material quality, noise source mitigation, advanced quantum circuit designs, novel cryogenic
technology, etc. The current advanced state of superconducting qubits permits envisioning
them towards applications beyond quantum computing. An important direction of application is quantum sensing, given the high sensitivity of qubit devices to environmental fluctuations. In particular, superconducting qubits are the best existing single microwave photon detectors. This permits using qubits to detect signals in the form of individual microwave photons appearing from interactions through fundamental physics effects, such as dark matter axions [1], but also graviational waves.

In this project, a first generation of dark matter axion detectors based on superconducting
qubits will be built. The challenge in achieving a highly efficient detector is the combination of cavity QED physics with qubits to detect photons and the resilience of qubits under strong magnetic fields, which are necessary to achieve the axio-to-photon conversion. The project will focus on the characterization of the detector specifications, particularly the study of the baseline of dark count events and their relation with ionizing radiation impacts on the chip [2].

The PhD thesis will be framed in the context of the RADES collaboration, through the QRADES Quantera project funded by the Spanish Ministry of Science and Innovation, and by the EU project SUPREME. The project is expected to begin in Q1 2026. Interested candidates may submit an application with a CV including transcript of university records (both undergraduate and master degrees), a letter of motivation (1 page) and at least 2 letters of recommendation.

More information on this position and the QCT group can be found here: https://qct.ifae.es/

[1] A. Dixit et al., Phys. Rev. Lett. 126, 141302 (2021)
[2] E. Bertoldo et al., New J. Phys. 27, 023014 (2025)

PhDs and Postdoctoral researchers in quantum communication

Destination: Vigo Quantum Communication Centre, Universidad de Vigo
Deadline: 31/12/2025

The Vigo Quantum Communication Centre (https://vqcc.uvigo.es/) at the University of Vigo is seeking doctoral students to conduct research in quantum communication. We welcome both theoretical and experimental researchers. One candidate could participate in a project recently funded by the Ministry, for which an FPI grant is available. If you are interested and would like more information, please contact Professor Marcos Curty.

Topology and strong interactions in non-equilibrium quantum simulators

Destination: Institute of Fundamental Physics – CSIC
Deadline: 30/11/2025

PhD project on the theory of topological non-equilibrium phases in quantum simulators.

Quantum simulators, such as superconducting circuits or trapped ions, enable the creation of new phases of quantum matter. These new phases are important from a fundamental viewpoint, as they challenge our understanding of quantum complex systems. They can also find applications for designing precise sensors and amplifiers. In recent years, our group has developed a novel formalism for describing topological non-equilibrium phases of matter in quantum simulators. However, many questions remain open, like the role of interactions and disorder. This project will develop a theoretical description of complex topological phases based on analytical approaches and numerical algorithms. We will analyse how interactions lead to exotic new topological phases and explore their dynamical and structural properties.

The ideal candidate will have a solid theoretical background in quantum mechanics, quantum optics, and condensed matter physics. More specifically, you will:

● Modelize quantum simulators based on quantum optical setups using theoretical techniques from quantum open systems (master equations, Floquet theory)
● Analyze quantum phase transitions and topological phases
● Develop numerical algorithms based on phase-space methods (truncated Wigner approximation) or Matrix Product States to describe interacting phases. Numerical experience with Python is useful here.

What we offer:
● Funded PhD position within the 4-year research project (“FPI Grant” funded by the National Project PID2024-159152NB-I00)
● A stimulating environment: the QUINFOG group at IFF-CSIC (6 faculty, several postdocs/PhDs)
● Possibilities for international collaborations with theory and experimental groups.

The search is restricted to students fulfilling the criteria of the call (European citizens
with certification of at least 300 ECTS, or students from outside the European Union
with the Spanish equivalent of 300 ECTS).

The call is expected to mirror last year’s. Selected candidates will apply to the official
opening expected in November, with PhD start around January 2026 (exact dates
TBA).

PhD on quantum dynamics

Destination: CSIC, IFF
Deadline: 30/11/2025

I am pleased to announce that we will soon open a fully funded 4 year PhD position Quinfog at IFF-CSIC (Madrid) and IFT-UAM/CSIC supervised by Luca Tagliacozzo and Esperanza Lopez,

The specific project develops new theoretical and computational tools, based on tensor networks, to study the out-of-equilibrium dynamics of many-body quantum systems. We are looking for highly motivated candidates with a solid background in quantum mechanics and field theory, some experience with numerical methods, and good scientific writing skills in English.
Please find the full description in the above link. sted students.

PhD position in Quantum Science with Cold Atoms

Destination: Institute of Cosmos Sciences, Universitat de Barcelona
Deadline: 30/11/2025

We are pleased to announce a PhD position in Experimental Quantum Science in a new research group at the Universitat de Barcelona and the Institute of Cosmos Sciences (ICCUB).

The project will focus on designing and building a new ultracold-atom platform. We plan to combine optical tweezers and optical lattices to create a versatile machine for quantum simulation and quantum optics.

We are looking for motivated candidates with an MSc in Physics (or a related discipline) by September 2026. An ideal background would include experience in atomic physics, quantum science, or experimental photonics. The fellowship would start in Fall 2026, and the deadline for the pre-selection call is November 30, 2025.

For questions or informal inquiries please contact Antonio Rubio Abadal directly.

Becas de Introducción a la Investigación JAE Intro ICU en QUINFOG

Destination: QUINFOG – Instituto de Física Fundamental-CSIC
Deadline: 01/09/2026

Nuestro grupo ofrece cuatro becas de introducción a la investigación para estudiantes universitarios en la próxima convocatoria JAE Intro ICU.

– Plazo de solicitud abierto del 1 al 30 de septiembre 2025.

– 3 meses de duración, fechas a concretar con los investigadores durante 2026.

– 20 horas semanales, 600 €/mes.

– Dirigidas a estudiantes universitarios (grado o máster en Ciencias o Ingeniería Física).

– Cuatro becas en el campo de las tecnologías cuánticas en nuestro grupo:

* Tecnologías Cuánticas Fotónicas para la Integración Óptico-THz (IFF03), Carlos Sánchez Muñoz c.sanchez.munoz@csic.es
* Sensores cuánticos topológicos (IFF-04), Diego Porras Torre, diego.porras@csic.es
* Quantum Simulation with Digitized Superconducting Computers (IFF-05), Alan Costa Dos Santos, ac_santos@iff.csic.es
* Simuladores cuánticos programables (IFF-06), Alejandro González Tudela, a.gonzalez.tudela@csic.es

Toda la información y documentación de la convocatoria se encuentra disponible en:

https://sede.csic.gob.es/tramites/programa-jae/convocatoria-jae-intro-icu-2025

que incluye los Planes de Formación de las ofertas e instrucciones para la solicitud. No dudéis en contactar a los supervisores para más información sobre cada proyecto ofertado, o info.iff@csic.es sobre el proceso de solicitud.