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
2022
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Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Lealiaert, Jonathan;
Själander, Magnus;
Folven, Erik;
Tufte, Gunnar.
(2022)
Flatspin: A large-scale artificial spin ice simulator.
Physical review B (PRB).
volum 106 (6).
Academic article
2020
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Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Själander, Magnus;
Folven, Erik;
Tufte, Gunnar.
(2020)
flatspin: A Large-Scale Artificial Spin Ice Simulator.
arXiv.org.
Academic article
-
Jensen, Johannes Høydahl;
Tufte, Gunnar.
(2020)
Reservoir Computing in Artificial Spin Ice.
ALIFE : Proceedings of the Artificial Life Conference.
Academic article
2018
-
Jensen, Johannes Høydahl;
Folven, Erik;
Tufte, Gunnar.
(2018)
Computation in artificial spin ice.
The 2018 Conference on Artificial Life.
Academic chapter/article/Conference paper
2017
-
Jensen, Johannes;
Tufte, Gunnar.
(2017)
Reservoir Computing with a Chaotic Circuit.
Proceedings of the European Conference on Artificial Life 2017.
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.
volum 9 (1, 2).
Academic article
Journal publications
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Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Lealiaert, Jonathan;
Själander, Magnus;
Folven, Erik;
Tufte, Gunnar.
(2022)
Flatspin: A large-scale artificial spin ice simulator.
Physical review B (PRB).
volum 106 (6).
Academic article
-
Jensen, Johannes Høydahl;
Strømberg, Anders;
Lykkebø, Odd Rune Strømmen;
Penty, Arthur George;
Själander, Magnus;
Folven, Erik;
Tufte, Gunnar.
(2020)
flatspin: A Large-Scale Artificial Spin Ice Simulator.
arXiv.org.
Academic article
-
Jensen, Johannes Høydahl;
Tufte, Gunnar.
(2020)
Reservoir Computing in Artificial Spin Ice.
ALIFE : Proceedings of the Artificial Life Conference.
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.
volum 9 (1, 2).
Academic article
Part of book/report
-
Jensen, Johannes Høydahl;
Folven, Erik;
Tufte, Gunnar.
(2018)
Computation in artificial spin ice.
The 2018 Conference on Artificial Life.
Academic chapter/article/Conference paper
-
Jensen, Johannes;
Tufte, Gunnar.
(2017)
Reservoir Computing with a Chaotic Circuit.
Proceedings of the European Conference on Artificial Life 2017.
Academic chapter/article/Conference paper
Media
2023
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Academic lectureJensen, Johannes Høydahl; Strømberg, Anders; Lykkebø, Odd Rune Strømmen; Penty, Arthur George; Leliaert, Jonathan; Själander, Hans Magnus; Folven, Erik; Tufte, Gunnar. (2023) flatspin: A Large-Scale Artificial Spin Ice Simulator. IEEE Advances in Magnetics 2023 . IEEE; Moena. 2023-01-15 - 2023-01-18.
2021
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Academic lectureJensen, Johannes Høydahl. (2021) Emergent magnetic computation. IDI PhD seminar . IDI; 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; Tufte, Gunnar. (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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Academic lectureLykkebø, Odd Rune Strømmen; Jensen, Johannes Høydahl; Penty, Arthur George; Strømberg, Anders; Själander, Magnus; Folven, Erik; Tufte, Gunnar. (2019) Emergent computation on a magnetic lattice. First International Workshop on Theoretical and Experimental Material Computing (TEMC 2019) . Susan Stepney; Tokyo. 2019-06-03 - 2019-06-03.
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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. Norwegian NanoSymposium 2019 . NTNU Nano; Trondheim. 2019-10-16 - 2019-10-17.
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Academic lectureStrømberg, Anders; Digernes, Einar; Slöetjes, Samuel Dingeman; Jensen, Johannes Høydahl; Tufte, Gunnar; Grepstad, Jostein; Folven, Erik. (2019) Magnetic Force Microscopy of Intermediate Angle Pinwheel Artificial Spin Ice. Joint European Magnetic Symposia 2019 . The European Magnetism Association; Uppsala. 2019-08-26 - 2019-08-30.
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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. NanoNetwork 2019 . Norwegian NanoNetwork; Tromsø. 2019-06-17 - 2019-06-19.
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PosterStrømberg, Anders; Penty, Arthur George; Jensen, Johannes Høydahl; Lykkebø, Odd Rune Strømmen; Själander, Magnus; Tufte, Gunnar; Folven, Erik. (2019) Unconventional Computing with Artificial Spin Ice. Frontiers in Artificial Spin Ice . Paul Scherrer Institut; Bad Zurzach. 2019-02-06 - 2019-02-08.
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 Symposium 2018 . NTNU Nano; NTNU Akrinn. 2018-11-28 - 2018-11-29.