Biography

Magnus Borgh joined UEA as a Research Fellow in Physics in 2016.  He obtained his doctorate from Lund University, Sweden.  He was subsequently awarded the Swedish Research Council Postdoctoral Stipend for postdoctoral research at DAMTP, University of Cambridge, followed by a Leverhulme Early Career Fellowship and an EPSRC Postdoctoral Fellowship at the University of Southampton.

Dr Borgh's research interests focus on ultra-cold atomic systems, in particular Bose-Einstein condensates. These represent a state of matter where all atoms occupy the same quantum-mechanical state. Bose-Einstein condensates have several interesting properties, including superfluidity and associated phenomena such as the appearance of quantised vortices and other so-called topological defects. One particular interest for Dr Borgh's research is the study of topological defects — e.g., vortices and monopoles — in Bose-Einstein condensates where the atoms have non-zero quantum-mechanical spin, giving rise to a particularly righ phenomenology.  In these systems, the mathematical description of the defects is analogous to phenomena appearing in theories of the very early universe, opening up the possibilities of using the experimentally very accessible Bose-Einstein condensates as "quantum emulators" of objects and phenomena that may otherwise be difficult to study.

Dr Borgh is also interested in Bose-Einstein condensates of exciton-polaritons in semiconductor microcavities. These are "quasiparticles" that can be described as "half matter-half light". Quasiparticle condensates are especially interesting because they are inherently non-equilibrium systems, giving rise to phenomena that arise from the dynamics of laser-pumping and decay of the particles in the condensate.

Selected publications

Stable core symmetries and confined textures for a vortex line in a Spinor Bose-Einstein condensate
Magnus O. Borgh, Muneto Nitta, and Janne Ruostekoski
Phys. Rev. Lett. 116, 085301 (2016)
DOI: 10.1103/PhysRevLett.116.085301

Stability and internal structure of vortices in spin-1 Bose-Einstein condensates with conserved magnetization
Justin Lovegrove, Magnus O. Borgh, and Janne Ruostekoski
Phys. Rev. A 93, 033633 (2016)
DOI: 10.1103/PhysRevA.93.033633

Imprinting a topological interface using Zeeman shifts in an atomic spinor Bose–Einstein condensate
Magnus O. Borgh, Justin Lovegrove, and Janne Ruostekoski
New J. Phys. 16, 053046 (2014)
DOI: 10.1088/1367-2630/16/5/053046

Energetic stability of coreless vortices in Spin-1 Bose-Einstein condensates with conserved magnetization
Justin Lovegrove, Magnus O. Borgh, and Janne Ruostekoski
Phys. Rev. Lett. 112, 075301 (2014)
DOI: 10.1103/PhysRevLett.112.075301 

Topological interface physics of defects and textures in spinor Bose-Einstein condensates
Magnus O. Borgh and Janne Ruostekoski
Phys. Rev. A 87, 033617 (2013)
DOI: 10.1103/PhysRevA.87.033617

Energetically stable singular vortex cores in an atomic spin-1 Bose-Einstein condensate
Justin Lovegrove, Magnus O. Borgh, and Janne Ruostekoski
Phys. Rev. A 86, 013613 (2012)
DOI: 10.1103/PhysRevA.86.013613

Robustness and observability of rotating vortex-lattices in an exciton-polariton condensate
Magnus O. Borgh, Guido Franchetti, Jonathan Keeling, Natalia G. Berloff
Phys. Rev. B 86, 035307 (2012)
DOI: 10.1103/PhysRevB.86.035307

Topological interface engineering and defect crossing in ultracold atomic gases
Magnus O. Borgh and Janne Ruostekoski
Phys. Rev. Lett. 109, 015302 (2012)
DOI: 10.1103/PhysRevLett.109.015302

Spatial pattern formation and polarization dynamics of a nonequilibrium spinor polariton condensate
Magnus O. Borgh, Jonathan Keeling, Natalia G. Berloff
Phys. Rev. B 81, 235302 (2010)
DOI: 10.1103/PhysRevB.81.235302

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