Tobias Ambjörnsson

Senior lecturer

Personal profile


Theoretical bionanophysics


Research overview

I have a broad expertise within the fields of theoretical biological physics, equilibrium and non-equilibrium statistical physics, mathematical physics and nanophysics. I worked with several experimental partners from the fields of physics, chemistry and nanoscience.


Examples of research topics

  • Data analysis and modeling for particle tracking 
  • Optical DNA mapping (DNA barcoding)
  • Crowding effects on tracer particle dynamics in many-body systems
  • Single-file diffusion
  • Localized surface plasmons in metallic nanoparticles
  • Electric and electromagnetic response of biomembranes
  • DNA breathing dynamics and protein binding dynamics
  • Translocation of biopolymers through nanopores
  • Fluroscence of molecules near metallic surfaces
  • Interaction between optical electromagnetic fields and molecular aggregates
  • Epidemiology on networks


Group members 

  • Albertas Dvirnas, post-doc 2022- 
  • Dibyayjoti Mohanta, post-doc 2022- 
  • Erik Clarkson, research intern 2022-2023 


Previous members

  • Steffi Schijf, BSc student 2022-2023.
  • Erik Clarkson, MSc student, 2022.
  • Simon Tropp, MSc student, 2022.
  • Jake Lumsden, MSc student, 2022.
  • Albertas Dvirnas, PhD student, 2017-2022.
  • Lennart Golks, Master student, 2020-2021.
  • Nirvika Chouhan, Research intern (through Jobbsprånget) 2020-2021.
  • Magnus Brander, Master student 2019-2020.
  • Jens Krog, Post-doc 2018-2020.
  • Wensi Zhu, Master student 2017-2018.
  • Magnus Brander, Bachelor student 2018.
  • Henrik Nordanger, Master student 2016, project worker 2017.
  • Callum Stewart, Master student 2016-2017,
  • Lisa Rämisch, Summer research intern 2017. 
  • Arthur Genthon, Exchange master student (Ecole Normale Superieure Paris-Saclay) 2019
  • Saair Quaderi, Visting researcher 2015-2017.
  • Vibha Kumra, Bachelor student 2016.
  • Hemant Kumar, Visting researcher (Indian Institute of Technology, Delhi) 2016.
  • Johannes Isaksson, Bachelor student 2016.
  • Christoffer Pichler, Masters student 2015.
  • Paola Torche, Bachelor student 2015.
  • Erik Lagerstedt, Masters student 2014.
  • Michaela Schad, PhD student 2010-2015.
  • Erik Lagerstedt, Bachelor student 2011.
  • Susanna Hammarberg, Summer research intern 2014.
  • Charleston Noble, Researcher 2013-2014.
  • Lloyd Sanders, PhD student 2010-2014.
  • Adam Nilsson, Masters student 2013.
  • Simon Pigeon, Post-doc 2012-2013.
  • Karl Fogelmark, Master student and research intern 2010-2011.


List of past and present collaborators (alphabetical order)

  • Peter Apell, Chalmers University, Sweden.
  • Suman Banik, Bose Institute, India.
  • Eli Barkai, Bar Ilan University, Israel.
  • Dirk Brockmann, Northwestern University, USA.
  • Yuval Ebenstein, Tel Aviv University, Israel.
  • Per Lyngs Hansen, University of Southern Denmark, Denmark.
  • John Kasianowicz, National Institute of Standards and Technology, USA.
  • Peter Jönsson, Physical chemistry, Lund University
  • Oleg Krichevsky, Ben-Gurion University, Israel.
  • Zoran Konkoli, Chalmers University, Sweden.
  • Mikael Käll, Chalmers University, Sweden.
  • Ludvig Lizana, Umeå University, Denmark.
  • Michael Lomholt, University of Southern Denmark, Denmark.
  • Ed Di Marzio, National Institute of Standards and Technology, USA.
  • Ralf Metzler, Technical University Munich, Germany.
  • Gautam Mukhopadhyay, Indian Institute of Technology Bombay, India.
  • Weihai Ni, Universidade de Vigo, Spain.
  • Pontus Nordenfelt, Division of Infection Medicine, Lund University.
  • Tomas Novotny, Charles University, Czech Republic.
  • Jonas Pedersen, Technical University of Denmark, Denmark.
  • Robert Silbey, Massachusetts Institute of Technology, USA.
  • Alessandro Taloni, Tel Aviv University, Israel.
  • Jonas Tegenfeldt, Lund University and Göteborg University, Sweden.
  • Jianfang Wang, Chinese University of Hong Kong.
  • Fredrik Westerlund, Chalmers University, Sweden.



  • 2023-2027: VR, project grant: Connecting the dots: probabilistic mapping of biomolecular paths in fluorescence microscopy, PI.
  • 2022-2024: Barncancerfonden, Optical DNA mapping for improved diagnostics for children with leukemia, co-PI. PI: Fredrik Westerlund.
  • 2022-2024:The Erling-Persson Family Foundation, Next generation diagnostic of bacterial infections, co-PI. PI: Fredrik Westerlund.
  • 2018-2019: Crafoord Foundation, Detecting antibiotic resistance genes on plasmids using high-throughput and cell-phone microscopy based optical DNA mappings, PI.
  • 2017-2020: The Erling-Persson Family Foundation, A novel ultrafast method for detecting multiresistant bacteria in intensive care units, co-PI. PI: Fredrik Westerlund. 
  • 2015-2019: VR, project grant,  Non-equilibrium biophysics in nano-confined systems, Grant ID: 2014-4305, PI. 
  • 2015-2019: EU, BeyondSeq -- Genomic diagnostics beyond the sequence, PI: Yuval Ebenstein.
  • 2012-2013, Carl Tryggers Stiftelse. Classifying DNA Melting Maps for Ultra-fast Identification of Species, PI. 
  • 2011-2012, The Crafoord Foundation. Nanoscale tracer dynamics in many-body heterogenous soft matter systems, PI.
  • 2010-2014: VR, project grant, Modeling of nanoscale biophysical  processes and label-free detection using metallic nanoparticles, PI.
  • 2006-2011: The Knut and Alice Wallenberg Foundation. Bio-nano-sensor physics. Post-doc grant + repatriation, PI.






  • FYTN15/FMFN25 Statistical Mechanics (course coordinator/lecturer) 
  • FYTN05 Theoretical Biophysics (lecturer) 



  • FYTN03 Computational Physics (course coordinator/lecturer), 2009-2019
  • FYTK02/FYTM03/FYTM04, degree project in theoretical physics (course coordinator), 2015-2018, 2020-2022.
  • Morphomatics, Chalmers University (lecturer), 2001-2002  
  • Living State Physics, Chalmers University (lecturer), 1999-2001
  • Teaching Assistant for several courses at Chalmers University of Technology and Göteborg University, 1998-2003 

Expertise related to UN Sustainable Development Goals

In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):

  • SDG 3 - Good Health and Well-being

UKÄ subject classification

  • Other Physics Topics

Free keywords

  • Theoretical Biophysics
  • computational science


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Collaborations the last five years

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