Susanne F Viefers

Professor - Theoretical Physics

Norwegian version of this page

Email s.f.viefers@fys.uio.no

Phone +47-22855004

Room 473 East wing

Username

Visiting address Sem Sælands vei 24 Fysikkbygningen 0371 OSLO

Postal address Postboks 1048 Blindern 0316 OSLO

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Academic Interests

I am presently PI of the project "Topological quantum phenomena in low dimensional systems", funded by the Norwegian research council. The project group consists of three professors (Syljuåsen, Leinaas, myself), two postdocs, two PhD students, and Master students.

My general field of research is quantum effects in systems where particles move in two (or one) dimensions. One of my main interests has been the fractional quantum Hall effect (FQHE) and its fractionally charged, anyonic quasiparticle excitations. In particular, in collaboration with groups in Stockholm, Paris and Penn State, we have been studying the conformal field theory description of Abelian and non-Abelian FQH states and their quasiparticles. From this, a nice, unified picture of the Abelian hierarchy and its connection to the composite fermion model seems to emerge, and a new hierarchy of non-Abelian states has been proposed. Some relevant papers: Phys. Rev. Lett. 102, 166805 (2009); Phys. Rev. Lett. 98, 076801 (2007), arXiv:1004.3657, arXiv:1011.5365. We have just written a review of this topic for Reviews of Modern Physics (to appear in 2017).

Another main interest is occurrence of topological phases in cold atom systems. in particular we have been interested in quantum Hall-type/lowest Landau level states in atomic Bose condensates in a synthetic magnetic field, e.g. under rotation. For an invited review paper, see S. Viefers, J. Phys.: Condens. Matter 20, 123202 (2008). More recent papers are found in the publication list below.

All of the above work lies in the field of Topological Phases -- the topic of the Physics Nobel Prize 2017.

Previously, I also worked on mesoscopic systems (quantum dots and -rings), as well as carbon nanotube-based nano-electromechanical systems.

Here's my CV and publication list

Teaching

Spring term: FYS3140 (Mathematical methods)

Fall term: FYS3110 (Quantum mechanics)

Higher education and employment history

Born 1970

PhD, University of Oslo 1997

Postdoc, NORDITA (Copenhagen) 1998-2000

Visiting scientist, Jyväskylä, fall 1999

Postdoc, Chalmers University of Technology 2000-2002

Assistant professor, Chalmers 2002

Associate professor, University of Oslo, 2003-2007

Professor, University of Oslo, 2007 - present

Guest professor, Stockholm University, fall term 2008

Committees/administration

Member of the department of physics Board 2013-

Representing Norway on the Board of NORDITA (Nordic Institute of Theoretical Physics in Stockholm) -- full member/vice chairman 2007-13; suppleant 2013-

See CV for list of previous committee work

Collaborators (past 10 years)

Prof. Hans Hansson, Stockholm University

Prof. Anders Karlhede, Stockholm University

Prof. Matti Manninen, Jyväskylä

Prof. Nicolas Regnault, Paris

Dr. Maria Hermanns, Princeton

Prof. Jainendra Jain, Penn State

Dr. Mathieu Taillefumier, Oslo

PhD student. Juha Suorsa, Oslo

Prof. Jari Kinaret, Chalmers

Prof. Stephanie Reimann, Lund

Tags: fractional quantum Hall effect, theoretical physics, Nordic, low-dimensional phyics, Strongly corrrelated electrons, physics, atomic Bose condensates, USA

Hansson, Thors Hans; Hermanns, Maria; Simon, Steven H & Viefers, Susanne F (2017). Quantum Hall Physics - hierarchies and CFT techniques. Reviews of Modern Physics. ISSN 0034-6861. 89(2) . doi: 10.1103/RevModPhys.89.025005
Meyer, Marius Ladegård; Liabøtrø, Ola & Viefers, Susanne F (2016). Linear dependencies between composite fermion states. Journal of Physics A: Mathematical and Theoretical. ISSN 1751-8113. 49(39) . doi: 10.1088/1751-8113/49/39/395201
Meyer, Marius Ladegård; Sreejith, Ganesh Jaya & Viefers, Susanne F (2014). Rotational properties of two-component Bose gases in the lowest Landau level. Physical Review A. Atomic, Molecular, and Optical Physics. ISSN 1050-2947. 89(4) . doi: 10.1103/PhysRevA.89.043625 Full text in Research Archive.
Manninen, M; Viefers, Susanne F & Reimann, S (2012). Quantum rings for beginners II: Bosons versus fermions. Physica. E, Low-Dimensional systems and nanostructures. ISSN 1386-9477. 46, s 119- 132 . doi: 10.1016/j.physe.2012.09.013
Suorsa, Juha Markus; Viefers, Susanne F & Hansson, Thors Hans (2011). A general approach to quantum Hall hierarchies. New Journal of Physics. ISSN 1367-2630. 13 . doi: 10.1088/1367-2630/13/7/075006
Suorsa, Juha Markus; Viefers, Susanne F & Hansson, Thors Hans (2011). Quasihole condensates in quantum Hall liquids. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 83(23) . doi: 10.1103/PhysRevB.83.235130
Viefers, Susanne F & Taillefumier, Mathieu (2010). Asymptotically exact trial wavefunctions for yrast states of rotating Bose gases. Journal of Physics B: Atomic, Molecular and Optical Physics. ISSN 0953-4075. 43(15) . doi: 10.1088/0953-4075/43/15/155302
Hansson, TH; Hermanns, M; Regnault, N & Viefers, Susanne F (2009). Conformal Field Theory Approach to Abelian and Non-Abelian Quantum Hall Quasielectrons. Physical Review Letters. ISSN 0031-9007. 102(16) . doi: 10.1103/PhysRevLett.102.166805
Hansson, Thors Hans; Hermanns, Maria & Viefers, Susanne F (2009). Quantum Hall quasielectron operators in conformal field theory. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 80(16) . doi: 10.1103/PhysRevB.80.165330
Bergholtz, EJ; Hansson, TH; Hermanns, M; Karlhede, A & Viefers, Susanne F (2008). Quantum Hall hierarchy wave functions: From conformal correlators to Tao-Thouless states. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 77 . doi: 10.1103/PhysRevB.77.165325
Viefers, Susanne F (2008). Quantum hall physics in rotating Bose-Einstein condensates. Journal of Physics: Condensed Matter. ISSN 0953-8984. 20 . doi: 10.1088/0953-8984/20/12/123202
Hansson, Hans; Chang, Chia-Chen; Jain, Jainendra & Viefers, Susanne F (2007). Composite-fermion wave functions as correlators in conformal field theory. Physical Review B. Condensed Matter and Materials Physics. ISSN 1098-0121. 76 . doi: 10.1103/PhysRevB.76.075347
Hansson, TH; Chang, CC; Jain, JK & Viefers, Susanne F (2007). Conformal field theory of composite fermions. Physical Review Letters. ISSN 0031-9007. 98 . doi: 10.1103/PhysRevLett.98.076801
Christie, Michael F.; Ferdos, Fariba & Viefers, Susanne F (2006). Gender bias in engineering education, In Michael F. Christie (ed.), Shifting Perspectives in Engineering Education. C-SELT. ISBN 91-631-8476-1. Part 3, chapter 27. s 279 - 287
Korslund, Nicolay & Viefers, Susanne F (2006). Composite-fermion description of rotating Bose gases at low angular momenta. Physical Review A. Atomic, Molecular, and Optical Physics. ISSN 1050-2947. 73(063602)
Viefers, Susanne F; Christie, Michael F. & Ferdos, Fariba (2006). Gender equity in higher education: why and how? A case study of gender issues in a science faculty. European Journal of Engineering Education. ISSN 0304-3797. 31(1), s 15- 22
Jonsson, Magnus; Axelsson, Sven; Nord, Tomas; Viefers, Susanne F & Kinaret, Jari (2004). High frequency properties of a CNT-based nanorelay. Nanotechnology. ISSN 0957-4484. 15, s 1497
Chiao, Raymond Y.; Hansson, Thors Hans; Leinaas, Jon Magne & Viefers, Susanne F (2004). Two-dimensional "photon fluid": effective photon-photon interaction and physical realizations. Journal of Physics B: Atomic, Molecular and Optical Physics. ISSN 0953-4075. 37, s S81- S89
Chiao, Raymond Y.; Hansson, Thors Hans; Leinaas, Jon Magne & Viefers, Susanne F (2004). "Effective photon-photon interaction in a two-dimensional ""photon fluid""". Physical Review A. Atomic, Molecular, and Optical Physics. ISSN 1050-2947. 69, s art. no.- 063816
Jonsson, Magnus; Nord, Tomas; Kinaret, Jari & Viefers, Susanne F (2004). Effects of surface forces and phonon dissipation in a three-terminal nanorelay. Journal of Applied Physics. ISSN 0021-8979. 96, s 629- 635
Viefers, Susanne F; Manninen, Matti; Deo, Prosenjit s & Koskinen, Pekka (2004). Quantum rings for beginners: energy spectra and persistent currents. Physica. E, Low-Dimensional systems and nanostructures. ISSN 1386-9477. 21, s 1- 35
Jonsson, Magnus; Nord, Tomas; Viefers, Susanne F & Kinaret, Jari (2003). Effects of short range forces on a three terminal nanorelay. Proceedings volumes / Electrochemical society. ISSN 0161-6374. 13
Kinaret, Jari; Nord, Tomas & Viefers, Susanne F (2003). A carbon nanotube based nanorelay. Applied Physics Letters. ISSN 0003-6951. 82, s 1287

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Meyer, Marius Ladegård; Viefers, Susanne F & Liabøtrø, Ola (2016). Low-energy states in the lowest Landau level for rotating two-component Bose gases.
Meyer, Marius Ladegård; Viefers, Susanne F & Liabøtrø, Ola (2016). Low-energy states in the lowest Landau level for rotating two-component Bose gases. Show summary
In a previous work we have shown that one can use the composite fermion (CF) approach to find very good approximations to the lowest energy eigenstates of a rotating dilute two- component atomic Bose gas in the lowest Landau level. In particular, the CF approach surprisingly yields very good results also for low angular momenta, far from the quantum Hall regime. In the low L regime, the number of seemingly distinct candidate wave functions tends to be orders of magnitude larger than the number of linearly independent ones, precluding efficient application of the approach. Here we present a subset of CF wave functions that give good approximations to the ground state and low-lying excited states, and for which we have identified all linear dependence relations. The subset is used to study vortex formation and structure for L <= N1*N2, the product of the number of particles of each species.
Sudbø, Asle & Viefers, Susanne F (2016). Nobelprisen i Fysikk 2016. Fra Fysikkens Verden. ISSN 0015-9247. 78(4)
Viefers, Susanne F (2016). Kvantemekaniske særheter -- lave dimensjoner, topologi og nobelprisen.
Viefers, Susanne F (2016). Rotational properties of multi-species Bose gases in the lowest Landau level.
Viefers, Susanne F & Høgåsen, Hallstein (2016). Professor Jon Magne Leinaas fylte 70 år i år. Fra Fysikkens Verden. ISSN 0015-9247. 78(4)
Viefers, Susanne F (2014). Rotational properties of two-component bose gases in the lowest Landau level.
Viefers, Susanne F (2014). Rotational properties of two-component bose gases in the lowest Landau level.
Viefers, Susanne F (2014). Rotational properties of two-component bosons on the lowest Landau level.
Viefers, Susanne F (2014). Rotational properties of two-species Bose gases in the lowest Landau level.
Viefers, Susanne F (2014). Rotational properties of two-species Bose gases in the lowest Landau level.
Viefers, Susanne F (2014). Rotational properties of two-species Bose gases in the lowest Landau level.
Viefers, Susanne F & Lynnebakken, Hilde (2014, 26. august). Om verden var flat. [Internett]. forskning.no.
Viefers, Susanne F (2013). Strongly correlated states in rotating Bose gases.
Viefers, Susanne F (2009). Exotic quantum states in two dimensions -- Rotating Bose condensates and quantum Hall liquids.
Viefers, Susanne F (2009). Quantum Hall hierarchy revisited.
Viefers, Susanne F (2009). Quantum Hall hierarchy revisited (long version).
Viefers, Susanne F (2009). Quantum Hall hierarchy wave functions from conformal field theory.
Horsdal, Mats; Leinaas, Jon Magne & Viefers, Susanne F (2008). The nu=1 quantum Hall effect and its one dimensional representation. Series of dissertations submitted to the Faculty of Mathematics and Natural Sciences, University of Oslo.. 725.
Viefers, Susanne F (2007). Conformal field theory of composite fermions.
Viefers, Susanne F (2007). Hierarchical quantum Hall wave functions from conformal field theory.
Viefers, Susanne F (2007). Karbon nanorør.
Viefers, Susanne F (2007). Low-dimensional physics -- the theoretical basis of nanotechnology. NordForsk network 2005 - 2007.
Viefers, Susanne F (2007). Quantum Hall physics in rotating Bose-Einstein condensates.
Viefers, Susanne F (2007, 05. desember). Øremerking av vitenskapelige stillinger. Universitas.
Viefers, Susanne F (2006). Conformal Field Theory of Composite Fermions.
Viefers, Susanne F (2006). Low-dimensional physics.
Viefers, Susanne F (2006). Quantum Hall Physics in rotating Bose condensates.
Viefers, Susanne F (2006). Quantum Hall physics in rotating Bose condensates.
Henriksen, Ellen Karoline; Hole, Eli Olaug; Viefers, Susanne F & Kronstad, Ragna (2005, 10. juni). Einstine - er hun mulig?. Teknisk ukeblad. Show summary
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Leinaas, Jon Magne; Viefers, Susanne F & Vogt, Yngve (2005, 01. desember). Ny oppdagelse i Einstein-klasse: Ukjente partikler påvist etter 30 år.
Viefers, Susanne F (2005). Den magiske kvantefysikken.
Viefers, Susanne F (2005). Kvantemekanikk.
Viefers, Susanne F (2003). Effective photon-photon interactions in a two-dimensional "photon fluid".
Viefers, Susanne F (2003). Karbon Nanorør.

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Published Nov. 4, 2010 12:41 PM - Last modified Jan. 26, 2017 5:56 PM

Projects

Topological quantum phenomena in low dimensional systems

Research groups

Theoretical physics