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Antti J. Niemi

Researcher at Stockholm University

Publications -  184
Citations -  5968

Antti J. Niemi is an academic researcher from Stockholm University. The author has contributed to research in topics: Gauge theory & Quantum field theory. The author has an hindex of 34, co-authored 179 publications receiving 5565 citations. Previous affiliations of Antti J. Niemi include Helsinki University of Technology & University of Helsinki.

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Axial-Anomaly-Induced Fermion Fractionization and Effective Gauge-Theory Actions in Odd-Dimensional Space-Times

TL;DR: In this paper, a new quantum field-theoretical technique is developed and used to explore the relationship between evenspace-time-dimensional axial anomalies and background-field-induced fermion numbers and Euler-Heisenberg effective actions in odd-dimensional space-times.
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Stable knot-like structures in classical field theory

TL;DR: In this paper, it was shown that knots can emerge as stable, finite-energy solutions in a local, three-dimensional langrangian field-theory model, which can be used to describe a large number of physical, chemical and biological systems.
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FCC Physics Opportunities: Future Circular Collider Conceptual Design Report Volume 1

A. Abada, +1504 more
TL;DR: In this article, the physics opportunities of the Future Circular Collider (FC) were reviewed, covering its e+e-, pp, ep and heavy ion programs, and the measurement capabilities of each FCC component, addressing the study of electroweak, Higgs and strong interactions.
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Knots and Particles

TL;DR: In this article, it was shown that all torus knots appear as solitons in a 3+1 dimensional model, and the results were extended to the case of 3He superfluids.
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Partially Dual Variables in SU(2) Yang-Mills Theory

TL;DR: In this paper, a reformulation of SU(2) Yang-Mills theory in terms of new variables, appropriate for describing the theory in its infrared limit, was proposed, where the short distance limit described asymptotically free, massless point gluons and the large distance limit describes extended, massive knotlike solitons.