Egor Babaev

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The Department of Physics at KTH Royal Institute of Technology in Stockholm, Sweden, invites applications for a doctoral student position in Theoretical Condensed Matter Physics, supervised by Professor Egor Babaev. The research group is renowned for its broad spectrum of theoretical investigations, employing both analytical and numerical methods to address fundamental questions in condensed matter physics. Areas of focus include effective field theory, topological solitons, statistical mechanics of phase transitions, topological systems, and advanced quantum many-body techniques. One of the group’s cutting-edge research topics is the study of composite order, highlighted by recent experimental discoveries such as the electron quadrupling condensate and topological defects carrying arbitrary fractions of magnetic flux quantum. These findings have challenged long-standing paradigms and opened new avenues for exploring the nature and applications of novel quantum states of matter. Additional research themes include quantum symmetry-breaking, topologically ordered states, unconventional phase transitions, and the use of innovative computational methods like Diagrammatic Monte-Carlo to tackle persistent problems in the field. The successful candidate will have opportunities to collaborate with both local and international theoretical and experimental groups, fostering a dynamic and interdisciplinary research environment. The position is full-time, with employment for up to four years, and includes a monthly salary in accordance with KTH’s doctoral student salary agreement, as well as access to a range of employee benefits. Eligibility requirements include a completed second cycle degree (such as a master’s) or at least 240 higher education credits, with a minimum of 60 credits at the second-cycle level, or equivalent knowledge. Proficiency in English equivalent to English B/6 is mandatory. Selection criteria emphasize the ability to work independently and collaboratively, a professional approach, and strong analytical skills. Personal attributes are highly valued in the selection process. Security clearance may be required for certain positions. To apply, candidates must submit a complete application via KTH’s recruitment system, including a CV, application letter (maximum two pages), certified copies of diplomas and grades, proof of language proficiency, and representative publications or technical reports. All documents must be submitted by the deadline of January 7, 2026. KTH Royal Institute of Technology is a leading international technical university committed to advancing education, research, and innovation for a sustainable future. The university offers a creative and dynamic environment, excellent working conditions, and a strong commitment to equality, diversity, and equal opportunities.

The Department of Physics at KTH Royal Institute of Technology, Stockholm, is seeking two doctoral students to join the research group led by Professor Egor Babaev. The group specializes in theoretical condensed matter physics, employing a wide range of analytical and numerical methods, including effective field theory, topological solitons, statistical mechanics of phase transitions, topological systems, and advanced quantum many-body techniques. A major research focus is the emerging field of composite order, highlighted by recent experimental discoveries such as electron quadrupling condensates and topological defects with fractional magnetic flux quantum, which challenge long-standing paradigms and open new avenues for fundamental research and applications. Additional topics include quantum symmetry-breaking, topologically ordered states, unconventional phase transitions, and the use of modern computational methods like Diagrammatic Monte-Carlo to address persistent problems in the field. The group encourages collaboration with both local and international theoretical and experimental teams. Doctoral students will benefit from a dynamic, international research environment, employee benefits, and a monthly salary in accordance with KTH’s doctoral student salary agreement. The position is full-time, with a maximum duration of four years, and includes opportunities for professional development and limited teaching or administrative duties. Applicants must hold a master’s degree or equivalent, demonstrate English proficiency (English B/6), and possess strong analytical, collaborative, and independent working skills. Applications should be submitted via KTH’s recruitment system and must include a CV, application letter, diplomas, language certificates, and representative publications. KTH is committed to equality, diversity, and a supportive study environment. The application deadline is November 12, 2025.

KTH Royal Institute of Technology is advertising a doctoral position in theoretical condensed matter physics within the group of Professor Egor Babaev at the Department of Physics in Stockholm, Sweden. The project focuses on a broad range of modern topics in condensed matter theory, combining analytical and numerical approaches. Research directions mentioned in the advertisement include effective field theory, topological systems, topological solitons, statistical mechanical descriptions of phase transitions, and modern microscopic quantum many-body techniques. The group also works on emerging forms of order such as electron quartet condensates and topological defects carrying arbitrary fractions of the magnetic flux quantum, as well as new symmetry-breaking quantum states, topologically ordered states, unconventional phase transitions, and computational approaches such as diagrammatic Monte Carlo. The position is part of KTH’s PhD education in physics. The advertisement emphasizes collaboration with international theoretical and experimental research groups involved in the project, making it attractive for candidates interested in a highly active and internationally connected research environment. Eligibility highlights: applicants must meet the general admission requirements for doctoral studies, meaning a second-cycle degree or equivalent preparation equivalent to at least 240 higher education credits including 60 advanced-level credits. An English qualification equivalent to English B/6 is required. Selection is based on the candidate’s ability to work independently, collaborate, take a professional approach, and handle complex problems; personal suitability is given significant weight. Funding and employment: the successful applicant will be employed as a doctoral student at KTH, with a monthly salary according to KTH’s doctoral salary agreement. The employment is time-limited and may last up to four years full-time, in line with doctoral study duration. How to apply: applications must be submitted via KTH’s recruitment system. The application should include copies of degree certificates and transcripts, proof of language eligibility, a CV, a motivation letter describing research interests and future goals, and representative publications or technical reports. If documents are not in English or Swedish, translations are required. The deadline is 2026-10-07 . This is a strong fit for candidates interested in theoretical condensed matter physics, quantum many-body theory, topological phases, phase transitions, and advanced computational physics methods.