Johannes Høydahl Jensen
About
I'm a researcher at the Computing (COMP) unit at Department of Computer Science. My field of research is unconventional computing, more specifically material computation in artificial spin ice.
Research
The goal of material computation is to exploit the natural properties of materials directly for computation. Computing close to physics can be extremely efficient, since computations can happen "for free" in the physical domain. The idea is that the physical world around us is rich with interesting phenomena, many which could potentially be useful for computing.
Classical computing is top-down, and typically asks: How can this physical thing be used to build logic gates?
Material computation is bottom-up, and asks instead: What computations does this physical thing do naturally?
The current focus of my research is computation in artificial spin ice (ASI). ASI are systems of coupled nanomagnets arranged on a 2D lattice. Local interactions between the magnets gives rise to a range of complex collective behavior. As a result, ASIs are often viewed as metamaterials. ASIs are promising computing substrates due to the rich variety of emergent behavior, accompanied by considerable control and flexibility.
Research interests:
- Reservoir Computing
- Material computiation
- Artificial spin ice
- Self-organized systems
- Dynamical systems
- Evolution-in-materio
Publications
2024
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Jensen, Johannes Høydahl;
Strømberg, Anders;
Breivik, Ida;
Penty, Arthur George;
Nino, Miguel Angel;
Khaliq, Muhammad Waqas.
(2024)
Clocked dynamics in artificial spin ice.
Nature Communications
Academic article
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Aven, Thomas;
Jensen, Johannes Høydahl;
Tufte, Gunnar.
(2024)
Lattice reservoirs: symmetry breaking and information flow in physical reservoir computing.
ALIFE : Proceedings of the Artificial Life Conference
Academic article
2022
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Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Lealiaert, Jonathan;
Själander, Magnus.
(2022)
Flatspin: A large-scale artificial spin ice simulator.
Physical review B (PRB)
Academic article
2020
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Jensen, Johannes Høydahl;
Tufte, Gunnar.
(2020)
Reservoir Computing in Artificial Spin Ice.
ALIFE : Proceedings of the Artificial Life Conference
Academic article
-
Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Själander, Magnus;
Folven, Erik.
(2020)
flatspin: A Large-Scale Artificial Spin Ice Simulator.
arXiv.org
Academic article
2018
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Jensen, Johannes Høydahl;
Folven, Erik;
Tufte, Gunnar.
(2018)
Computation in artificial spin ice.
MIT Press
Academic chapter/article/Conference paper
2017
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Jensen, Johannes;
Tufte, Gunnar.
(2017)
Reservoir Computing with a Chaotic Circuit.
MIT Press
Academic chapter/article/Conference paper
2016
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Nichele, Stefano;
Jensen, Johannes Høydahl;
Laketic, Dragana;
Lykkebø, Odd Rune Strømmen;
Tufte, Gunnar.
(2016)
Dynamics in Carbon Nanotubes for In-Materio Computation.
International Journal On Advances in Systems and Measurements
Academic article
Journal publications
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Jensen, Johannes Høydahl;
Strømberg, Anders;
Breivik, Ida;
Penty, Arthur George;
Nino, Miguel Angel;
Khaliq, Muhammad Waqas.
(2024)
Clocked dynamics in artificial spin ice.
Nature Communications
Academic article
-
Aven, Thomas;
Jensen, Johannes Høydahl;
Tufte, Gunnar.
(2024)
Lattice reservoirs: symmetry breaking and information flow in physical reservoir computing.
ALIFE : Proceedings of the Artificial Life Conference
Academic article
-
Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Lealiaert, Jonathan;
Själander, Magnus.
(2022)
Flatspin: A large-scale artificial spin ice simulator.
Physical review B (PRB)
Academic article
-
Jensen, Johannes Høydahl;
Tufte, Gunnar.
(2020)
Reservoir Computing in Artificial Spin Ice.
ALIFE : Proceedings of the Artificial Life Conference
Academic article
-
Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Själander, Magnus;
Folven, Erik.
(2020)
flatspin: A Large-Scale Artificial Spin Ice Simulator.
arXiv.org
Academic article
-
Nichele, Stefano;
Jensen, Johannes Høydahl;
Laketic, Dragana;
Lykkebø, Odd Rune Strømmen;
Tufte, Gunnar.
(2016)
Dynamics in Carbon Nanotubes for In-Materio Computation.
International Journal On Advances in Systems and Measurements
Academic article
Part of book/report
-
Jensen, Johannes Høydahl;
Folven, Erik;
Tufte, Gunnar.
(2018)
Computation in artificial spin ice.
MIT Press
Academic chapter/article/Conference paper
-
Jensen, Johannes;
Tufte, Gunnar.
(2017)
Reservoir Computing with a Chaotic Circuit.
MIT Press
Academic chapter/article/Conference paper
Outreach
2024
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Academic lectureBhandari, Dheerendra Singh; Strømberg, Anders; Breivik, Ida; Penty, Arthur George; Jensen, Johannes Høydahl; Foerster, Micheal. (2024) Clocking Emergent magnetic monopole in square Artificial Spin Ice. University of Perugia 25th International Colloquium on Magnetic Films and Surfaces -ICMFS2024 , University of Perugia, Perugia, Italy 2024-07-07 - 2024-07-12
2023
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Academic lectureJensen, Johannes Høydahl; Strømberg, Anders; Breivik, Ida; Penty, Arthur George; Folven, Erik; Tufte, Gunnar. (2023) Material computation and magnetic metamaterials: Clocked dynamics in artificial spin ice. IOP Mangetism Group Current Research in Magnetism 2023: Magnetic Neuromorphic Computing , London 2023-09-21 - 2023-09-21
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PosterStrømberg, Anders; Breivik, Ida; Jensen, Johannes Høydahl; Lykkebø, Odd Rune Strømmen; Penty, Arthur George; Leliaert, Jonathan. (2023) flatspin: A Simulation Framework for Artificial Spin Systems. ETH Zürich Frontiers in Artificial Spin Ice Workshop , Lenzburg 2023-06-14 - 2023-06-16
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Academic lectureBreivik, Ida; Jensen, Johannes Høydahl; Strømberg, Anders; Penty, Arthur George; Nino, Miguel Angel; Foerster, Micheal. (2023) Controlled Domain Dynamics in Artificial Spin Ice . NTNU Nano Norwegian NanoSymposium 2023 , Akrinn, Trondheim 2023-11-28 - 2023-11-29
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Academic lectureBreivik, Ida; Jensen, Johannes Høydahl; Strømberg, Anders; Penty, Arthur George; Nino, Miguel Angel; Foerster, Micheal. (2023) Stepwise Domain Growth in Artificial Spin Ice. Joint European Magnetic Symposia , Madrid 2023-08-28 - 2023-09-01
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Academic lectureJensen, Johannes Høydahl. (2023) Computation in magnetic metamaterials. Research Institute of Electrical Communication 2nd Online RIEC International Workshop on Spintronics , Online 2023-04-06 - 2023-04-06
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Academic lectureJensen, Johannes Høydahl; Strømberg, Anders; Lykkebø, Odd Rune Strømmen; Penty, Arthur George; Leliaert, Jonathan; Själander, Hans Magnus. (2023) flatspin: A Large-Scale Artificial Spin Ice Simulator. IEEE IEEE Advances in Magnetics 2023 , Moena 2023-01-15 - 2023-01-18
2021
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Academic lectureJensen, Johannes Høydahl. (2021) Emergent magnetic computation. IDI IDI PhD seminar , Trondheim 2019-10-02 - 2019-10-02
2020
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Academic lectureJensen, Johannes Høydahl; Strømberg, Anders; Lykkebø, Odd Rune Strømmen; Penty, Arthur George; Själander, Magnus; Folven, Erik. (2020) Introducing flatspin. Enabling Large Scale Dynamical Artificial Spin Ice Simulations. Magnetism and Magnetic Materials 2020 2020-11-02 - 2020-11-06
2019
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PosterStrømberg, Anders; Penty, Arthur George; Jensen, Johannes Høydahl; Lykkebø, Odd Rune Strømmen; Själander, Magnus; Tufte, Gunnar. (2019) Unconventional Computing with Artificial Spin Ice. Paul Scherrer Institut Frontiers in Artificial Spin Ice , Bad Zurzach 2019-02-06 - 2019-02-08
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Academic lectureStrømberg, Anders; Jensen, Johannes Høydahl; Tufte, Gunnar; Folven, Erik. (2019) Long-Range Order in Tightly Packed Pinwheel Artificial Spin Ice . Norwegian NanoNetwork NanoNetwork 2019 , Tromsø 2019-06-17 - 2019-06-19
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Academic lectureStrømberg, Anders; Digernes, Einar; Slöetjes, Samuel Dingeman; Jensen, Johannes Høydahl; Tufte, Gunnar; Grepstad, Jostein. (2019) Magnetic Force Microscopy of Intermediate Angle Pinwheel Artificial Spin Ice. The European Magnetism Association Joint European Magnetic Symposia 2019 , Uppsala 2019-08-26 - 2019-08-30
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Academic lectureStrømberg, Anders; Digernes, Einar; Jensen, Johannes Høydahl; Tufte, Gunnar; Grepstad, Jostein; Folven, Erik. (2019) Co-existing Ferromagnetic-Antiferromagnetic Order in a Magnetic Metamaterial. NTNU Nano Norwegian NanoSymposium 2019 , Trondheim 2019-10-16 - 2019-10-17
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Academic lectureLykkebø, Odd Rune Strømmen; Jensen, Johannes Høydahl; Penty, Arthur George; Strømberg, Anders; Själander, Magnus; Folven, Erik. (2019) Emergent computation on a magnetic lattice. Susan Stepney First International Workshop on Theoretical and Experimental Material Computing (TEMC 2019) , Tokyo 2019-06-03 - 2019-06-03
2018
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Academic lectureStrømberg, Anders; Jensen, Johannes Høydahl; Digernes, Einar; Tufte, Gunnar; Folven, Erik. (2018) Unconventional Computing with Artificial Spin Ice. NTNU Nano NTNU Nano Symposium 2018 , NTNU Akrinn 2018-11-28 - 2018-11-29