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COST Action POLYTOPO - CA23134: Topological Textures in Condensed Matter

Explore a series of physical systems using concepts of topology that lead to a deeper understanding of physical phenomena.

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Training School on Physics and Mathematics of Topological Textures.
12-13 May 2025 | Budapest, Hungary
Application deadline: March 14, 2025

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International Workshop on Physics and Mathematics of Topological Textures.
14-16 May 2025 | Budapest, Hungary
Application deadline: March 14, 2025

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The mathematical concept of topology is widely applied in condensed matter and other systems (magnets, ferroelectrics, optics and structured light, fluids, ultra-cold atoms and superfluids, superconductors, liquid crystals, topological band structures) providing a fresh perspective and leading to a deeper understanding of many physical phenomena. The Action focuses on theory and experiment for the creation and annihilation of topological textures and on their statics and their dynamical properties.

Typical examples of topological textures are domain walls, vortices, skyrmions, and hopfions. Their dynamics is often counter-intuitive and it is linked to topology in surprising ways. Their properties are often suitable for applications in sensors, logic and non-Boolean devices, logic-in-memory computing, and unconventional, neuromorphic, or quantum computing.

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Working groups

WG1. Topology and Transfer of Expertise

Identify and describe topological textures in a broad sense, in both real and momentum space. Investigate these textures in various physical systems and realistic models, and explore the relationships between them.

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WG2. Topological Textures and Applications

Explore the general properties of topological textures and related theory, including a more precise mathematical description. Study the generation, controlled annihilation, and manipulation of these textures.

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WG3. Textures in Three Dimensions

Investigate textures localized in three dimensions and their relation to quasi-2D textures. Develop theory alongside computational and experimental efforts.

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WG4. Dynamics and Topology

Examine the solitary wave and particle-like characteristics of topological textures, as well as collections of textures. Study non-equilibrium processes and phase transitions.

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POLYTOPO welcomes new members who like to engage within one of the networks working groups.

To become a member of a WP:

Verify / update your e-cost profile or create one.
Submit your application through e-cost portal.

Applications are reviewed regularly by the POLYTOPO core team and the Working Group leaders. This process typically takes one to three months. Candidates will be notified of the outcome of their application through the e-COST portal.

Explore Funding Opportunities: Application, Evaluation & Eligibility

POLYTOPO is an open multi-disciplinary network which welcomes new members and offers multiple options for participation and engagement. Individuals who like to engage in the POLYTOPO network’s work program can apply for becoming part of a working group. POLYTOPO also offers grants for the participation in POLYTOPO events, such as a training schools or workshopw as well as support for individual researchers through Short Term Scientific Missions (STSMs) grants and ITC/YRI conference grants.

Short Term Scientific Missions

Visit to a host organization located in a different country than the country of affiliation.

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ITC Conferences

Present your own work in a high-level conference, fully organised by a third party.

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Funding Opportunities

POLYTOPO brings together the separate sub-communities of theoretical, experimental, applied physics, and applied mathematics working on various physical systems applying concepts of topology, it combines expertise and boost synergies. It aims to support a larger community and to develop a unified framework for topological condensed matter systems.

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Job Opportunities

PhD Student Position in Theoretical Solid State Physics

Location: Max Planck Institute of Microstructure Physics, Halle, Germany
Duration: 3 years, starting in Autumn 2025 (no later than October 1, 2025)
Application Deadline: March 10, 2025
Subject Areas: Transport theory, spin-orbitronics, topology-related transport phenomena, two-dimensional oxide interfaces, magnetotransport
Description: The successful candidate will be part of the ANR-DFG project "New oxide-based two-dimensional electron and hole gases for spin-orbitronics" aiming to explore polar oxide interfaces hosting two-dimensional electron and hole gases. Closely collaborating with experimentalists, we will develop effective models to predict the spin/orbital textures, topological textures, and transport characteristics of these systems, particularly focusing on spin/orbital-charge interconversion effects and magnetotransport phenomena.

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MSCA Postdoc in Computational Physics in Active Matter and Biological Systems

Location: Department of Physics, University of Oslo, Oslo, Norway
Duration: 3 years, starting in Autumn 2025 (no later than October 1, 2025)
Application Deadline: April 6, 2025
Subject Areas: Active Matter, Statistical Physics
Description: The postdoctoral fellow will join the Condensed Matter Physics Group at the Department of Physics (UiO) and participate in the DSTrain training program, alongside interdisciplinary postdocs. DSTrain offers career development and fosters innovative research by integrating data science, computational science, natural sciences, and technology. Applicants should propose research projects within the Research Theme of Computational Physics in Active Matter and Biological Systems, exploring topics like: Topological defects in active matter; Broken symmetries and defects in cell tissues; 3D tissue morphogenesis; Active Matter in Confinement; Non-reciprocal interactions

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Postdoc in theoretical condensed matter physics

Location: Karlstad, Varmland, Sweden
Duration: 2 years, starting in 2025 (start date negotiable)
Application Deadline: -
Subject Areas: Physics / Condensed Matter Theory, Lattice Field Theory, Quantum Condensed Matter Theory, Quantum magnetism, quantum phase transitions, Quantum Simulation
Description: The successful candidate will contribute to the theoretical investigation of two-dimensional Ising lattice gauge theories coupled to dynamical fermion matter using two-dimensional tensor network methods.

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