audunska
Academic interests
I am interested in the statistical behavior of topological defects in different kinds of nonequilibrium systems. Examples of topological defects I have studied are quantized vortices in BoseEinstein condensates, and crystal defects in crystals undergoing deformation. In both these systems the dynamics of the entire system is dominated by the dynamics of defects, so the statistics of the defects can tell you a lot about how the system behaves on a macroscopic scale.
Courses taught
 http://www.uio.no/studier/emner/matnat/fys/FYS2130/indexeng.html (Spring 2015)
 http://www.uio.no/studier/emner/matnat/fys/FYS1120/indexeng.html (from Autumn 2015)
 http://www.uio.no/studier/emner/matnat/fys/FYS3120/indexeng.html (from Spring 2016)
Background
Master's degree in Physics, University of Oslo. I studied a long chain of interacting spin 1/2 particles, e.g. a 1D quantum Heisenberg model in a constant magnetic field. Previous work had shown that this system should contain natural oscillation frequencies due to an analogy with Bloch oscillations, called magnetic Bloch oscillations. I used a new technique called Time Evolving Block Decimation (TEBD) in order to simulate the full chain without uncontrolled approximations. I found that we could excite the predicted oscillation frequencies using a resonant laser, resulting in characteristic oscillations in the magnetization.
Thesis: https://www.duo.uio.no/handle/10852/38773
Publications

Skogvoll, Vidar; Skaugen, Audun & Angheluta, Luiza (2021). Stress in ordered systems: GinzburgLandautype density field theory. Physical review B (PRB). ISSN 24699950. 103(22). doi: 10.1103/PhysRevB.103.224107.

Skogvoll, Vidar; Skaugen, Audun; Angheluta, Luiza & Viñals, Jorge (2021). Dislocation nucleation in the phasefield crystal model. Physical review B (PRB). ISSN 24699950. 103(1), p. 0141071–0141078. doi: 10.1103/PhysRevB.103.014107.

Rønning, Jonas; Skaugen, Audun; HernándezGarcía, Emilio; López, Cristóbal & Angheluta, Luiza (2020). Classical analogies for the force acting on an impurity in a BoseEinstein condensate. New Journal of Physics. ISSN 13672630. 22. doi: 10.1088/13672630/ab95de. Full text in Research Archive

Skaugen, Audun; Angheluta, Luiza & Vinals, Jorge (2018). Separation of Elastic and Plastic Timescales in a Phase Field Crystal Model. Physical Review Letters. ISSN 00319007. 121(25), p. 25550101–25550105. doi: 10.1103/PhysRevLett.121.255501. Full text in Research Archive Show summary

Skaugen, Audun; Angheluta, Luiza & Vinals, Jorge (2018). Dislocation dynamics and crystal plasticity in the phasefield crystal model. Physical review B (PRB). ISSN 24699950. 97(5). doi: 10.1103/PhysRevB.97.054113. Full text in Research Archive

Skaugen, Audun & Angheluta, Luiza (2017). Origin of the inverse energy cascade in twodimensional quantum turbulence. Physical review. E. ISSN 24700045. 95(5). doi: 10.1103/PhysRevE.95.052144. Full text in Research Archive

Skaugen, Audun & Angheluta, Luiza (2016). Vortex clustering and universal scaling laws in twodimensional quantum turbulence. Physical review. E. ISSN 24700045. 93(3). doi: 10.1103/PhysRevE.93.032106.

Skaugen, Audun & Angheluta, Luiza (2016). Velocity statistics for nonuniform configurations of point vortices. Physical review. E. ISSN 24700045. 93(4). doi: 10.1103/PhysRevE.93.042137.

Skaugen, Audun (2018). A unified perspective on twodimensional quantum turbulence and plasticity. Det matematisknaturvitenskapelige fakultet. Full text in Research Archive