assoz.-Prof. Priv.-Doz. Dr. Gemma De les Coves

Associate Professor

Room: 2S12 
Phone: +43 512 507 52247
Email: Gemma.DelasCuevas[at]uibk.ac.at

Research group: Mathematical Quantum Physics

More Information

  • Personal Homepage
  • FLD Research Documentation

    Publications 2024

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Hoogsteder Riera, M.; Netzer, T. (2024): Tensor decompositions on simplicial complexes with invariance.
      In: Journal of Symbolic Computation 124, No. 102299. (DOI) (Web link)

    • De las Cuevas, Gemma; Klingler, A.; Netzer, Tim (2024): Polynomial decompositions with invariance and positivity inspired by tensors.
      In: Linear Algebra and Its Applications 698, pp. 537 - 588. (DOI) (Web link)



    Publications 2023

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Netzer, T.; Valentiner-Branth, I. (2023): Magic squares: Latin, Semiclassical and Quantum.
      In: Journal of Mathematical Physics 64/2, No. 022201. (DOI) (Web link)

    • Klingler, A.; Van der Eyden, M.; Stengele, S.; Reinhart, T.; De las Cuevas, G. (2023): Many bounded versions of undecidable problems are NP-hard.
      In: SciPost Physics 14, No. 173. (DOI) (Web link)

    • Stengele, Sebastian; Drexel, D.; De las Cuevas, Gemma (2023): Classical spin Hamiltonians are context-sensitive languages.
      In: Proceedings of the Royal Society of London Series A. Mathematical, Physical and Engineering Sciences 479/2274, Nr. 20220553. (DOI) (Web link)



    Lectures 2023

    Presentations at Conferences, Symposia, etc.

    Conference Lecture (Invited Lecture)
    • Lecturer(s): Van der Eyden, M. Co-author(s): De las Cuevas, G; Netzer, T: Undecidability of tensor stable positive maps.
      Joint Mathematics Meetings 2023, Boston, 2023-01-06. (Web link)

    Poster Presentation
    • Lecturer(s): Klingler, A. Co-author(s): Eyden, M.; Stengele, S.; Reinhart, T.; De Las Cuevas, G.: Many bounded versions of undecidable problems are NP-hard.
      18th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2023), Aveiro, 2023-07-25 (Online). (Web link)

    • Lecturer(s): Klingler, A. Co-author(s): Van der Eyden, M.; Stengele, S.; Reinhart, T.; De Las Cuevas, G.: Many bounded versions of undecidable problems are NP-hard.
      Quantum Information Theory 2023 (ICMAT): Functional Analysis and Quantum Information, Madrid, 2023-03-21. (Web link)



    Publications 2022

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • van der Eyden, Mirte; Netzer, Tim; De las Cuevas, Gemma (2022): Halos and Undecidability of Tensor Stable Positive Maps.
      In: Journal of Physics A-Mathematical and Theoretical 55/26, Nr. 264006. (DOI) (Web link)

    Journal Article (Meeting-Abstract)
    • Netzer, Tim; De las Cuevas, Gemma; Drescher, Tom (2022): Quantum Magic Squares.
      In: Oberwolfach Reports 18 (49/2021)/4, pp. 2679 - 2680. (DOI) (Web link)

    Other Publications

    Electronic Publication (Preprint)
    • Reinhart, T.; De las Cuevas, G. (2022): The grammar of the Ising model: A new complexity hierarchy. (Web link)



    Lectures 2022

    Presentations at Conferences, Symposia, etc.

    Conference Lecture (Invited Lecture)
    • Lecturer(s): De las Cuevas, G.: No system can talk about itself -- Yet here we are. On why the brain can make sense of the liar paradox.
      Wigner's Friends: Theory Workshop, San Francisco, 2022-12-02. (Web link)

    • Lecturer(s): De las Cuevas, G.: Universality, undecidability and Wigner's friend.
      Wigner's Friends: Theory Workshop, San Francisco, 2022-12-01. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: What is the reach of universality & undecidability?
      5th Seefeld Workshop on Quantum Information, Seefeld, 2022-06-28. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: What is the reach of universality & undecidability?
      Quantum Natural Language Processing (QNLP 2022), Oxford, 2022-05-30. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: What is the reach of universality & undecidability?
      Lie-Størmer Colloquium, Rosendal, 2022-05-26. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: What does universal mean? And what is the scope of universality & undecidability across disciplines?
      CRC 183 Berlin Conference 2022 on Entangled States of Matter, Berlin, 2022-05-02. (Web link)

    • Lecturer(s): Klingler, A. Co-author(s): De las Cuevas, G.; Netzer, T.: General tensor decompositions with invariance, positivity and approximations.
      Biannual Congress of the Real Sociedad Matemática Española (RSME), Cuidad Real (online), 2022-01-19. (Web link)

    Conference Lecture (Upon Registration)
    • Lecturer(s): Van der Eyden, M. Co-author(s): De Las Cuevas, Gemma; Netzer, Tim: Halos and undecidability of tensor stable positive maps.
      Quantum Physics and Logic 2022, Oxford, 2022-06-30. (Web link)

    Lecture at Summer-/Winterschool
    • Lecturer(s): De las Cuevas, Gemma: Universality & Undecidability.
      summer School Solstice of Foundations 2022, Zürich, 2022-06-21. (Web link)

    Poster Presentation
    • Lecturer(s): Klingler, A. Co-author(s): De las Cuevas, G.; Netzer, T.: General decompositions with invariance, positivity and approximations.
      Workshop on Random Tensors at CIRM, Luminy, Marseille, 2022-03-17. (Web link)

    • Lecturer(s): Klingler, A. Co-author(s): De las Cuevas, G.; Netzer, T.: Approximate tensor decompositions: disappearance of many separations.
      25th Annual Conference on Quantum Information Processing (QIP 2022), Pasadena (hybrid), 2022-03-10. (Web link)

    • Lecturer(s): Klingler, A. Co-author(s): Netzer, T.; De las Cuevas, Gemma: Border ranks of positive and invariant tensor decompositions.
      5th Seefeld Workshop on Quantum Information, Seefeld, 2022-06-30. (Web link)

    Guest Lectures

    Guest Lecture
    • Lecturer(s): De las Cuevas, Gemma: What does universal mean? An exploration at the intersection of physics.
      Universitat Autònoma de Barcelona / Autonome Universität Barcelona, Barcelona, 2022-03-10.

    • Lecturer(s): De las Cuevas, Gemma: Quantum theory: From the whole to the parts, magic squares, and shadows of infinity.
      Center for Theoretical Physics of the Polish Academy of Sciences / Centrum Fizyki Teoretycznej Polskiej Akademii Nauk, Warschau, 2022-02-24. (Web link)



    Publications 2021

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • Anton, B.; Besalu, M.; Fornes, O.; Bonet, J.; Molina, A.; Molina-Fernandez, R.; De las Cuevas, Gemma; Fernandez-Fuentes, N.; Oliva, B. (2021): On the use of direct-coupling analysis with a reduced alphabet of amino acids combined with super-secondary structure motifs for protein fold prediction.
      In: NAR Genomics and Bioinformatics 3/2, Nr. lqab027. (DOI) (Web link)

    • De Las Cuevas, Gemma; Klingler, A.; Netzer, Tim (2021): Approximate tensor decompositions: disappearance of many separations.
      In: Journal of Mathematical Physics 62/9, No. 093502. (DOI) (Web link)

    • De las Cuevas, Gemma; Klingler, Andreas; Lewis, Martha; Netzer, Tim (2021): Cats Climb Entails Mammals Move: Preserving Hyponymy in Compositional Distributional Semantics.
      In: Journal of Cognitive Science 22/3, pp. 311 - 353. (Web link)

    • Fraser, P.; Sole, R.; De las Cuevas, Gemma (2021): Why Can the Brain (and Not a Computer) Make Sense of the Liar Paradox?
      In: Frontiers in Ecology and Evolution 9, No. 802300. (DOI) (Web link)

    Journal Article (Review)
    • De las Cuevas, Gemma; Netzer, Tim (2021): Quantum information theory and free semialgebraic geometry: one wonderland through two looking glasses.
      In: Internationale Mathematische Nachrichten 246 (75. Jahrgang), pp. 1 - 28. (Web link)



    Lectures 2021

    Presentations at Conferences, Symposia, etc.

    Conference Lecture (Invited Lecture)
    • Lecturer(s): De las Cuevas, Gemma: From simplicity to universality and undecidability.
      VQC Colloquium, Wien, 2021-11-22. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: From simplicity to universality and undecidability.
      Online Seminar, Donostia International Physics Center, Donostia - San Sebastian (online), 2021-10-15. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: From simplicity to universality and undecidability.
      New York Category Theory Seminar, New York (online), 2021-10-06. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Classical Spin Hamiltonians Are Context-Sensitive Languages.
      Science Day Special: Sprache, Wien (online), 2021-09-23. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: From simplicity to universality and undecidability.
      International Workshop on Quantum Entanglement and Emergent Phenomena, Shanghai, 2021-08-18. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Positivity wants to break free.
      CIRM Tensor Networks: quantum physics, geometry and applications, Trento, 2021-07-26. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Universality everywhere: from spin models to automata, and beyond.
      SFB BeyondC Winter Workshop 2021, Wien, online, 2021-02-16. (Web link)

    • Lecturer(s): De las Cuevas, Gemma Co-author(s): Hoogsteder, Riera; Klingler, Andreas; Netzer, Tim: General decompositions with invariance, positivity and approximations.
      Geometry and Optimization in Quantum Information, Oberwolfach (online), 2021-10-06. (Web link)

    • Lecturer(s): De las Cuevas, Gemma Co-author(s): Netzer, Tim; Klingler, Andreas: Tensor Decompositions with Invariance and Positivity: Applications to Polynomials and the Approximate Case.
      SIAM Conference on Applied Algebraic Geometry (AG21), Texas, 2021-08-19. (Web link)

    • Lecturer(s): Netzer, Tim Co-author(s): De las Cuevas, Gemma; Drescher, Tom: Quantum Magic Squares.
      Oberwolfach Workshop on Geometry and Optimization in Quantum Information, Oberwolfach, hybrid, 2021-10-04. (Web link)

    Conference Lecture (Upon Registration)
    • Lecturer(s): De las Cuevas, Gemma: Universalities in natural languages.
      SemSpace 2021: Semantic Spaces at the Intersection of NLP, Physics, and Cognitive Science, Groningen (Online), 2021-06-16. (Web link)

    • Lecturer(s): Klingler, A. Co-author(s): De las Cuevas, Gemma; Netzer, T.: Approximate tensor decompositions: disappearance of many separations.
      MEGA 2021 - Effective Methods in Algebraic Geometry, Tromsø, online, 2021-06-11. (Web link)

    Lecture at Summer-/Winterschool
    • Lecturer(s): De las Cuevas, Gemma: Computational complexity for physicists.
      DK-Alm Summer School, Pertisau, 2021-07-13. (Web link)

    Poster Presentation
    • Lecturer(s): Klingler, A. Co-author(s): De las Cuevas, G.; Netzer, T.: General decompositions with invariance, positivity and approximations - ONLINE.
      SFB BeyondC Winter Workshop 2021, Wien, online, 2021-02-16. (Web link)

    • Lecturer(s): Klingler, A. Co-author(s): De las Cuevas, Gemma; Netzer, T.: Tensor and polynomial decompositions: making invariance and positivity explicit.
      Gemeinsame Jahrestagung der SPS und ÖPG 2021 (Swiss and Austrian Physical Societies), Innsbruck, 2021-08-31. (Web link)

    • Lecturer(s): Van der Eyden, Mirte Co-author(s): De las Cuevas, Gemma; Netzer, Tim: On tensor-stable positivity: computational complexity and field extensions.
      MEGA 2021 - Effective Methods in Algebraic Geometry, Tromsø, online, 2021-06-07. (Web link)

    Guest Lectures

    Guest Lecture
    • Lecturer(s): De las Cuevas, Gemma: From the whole to the parts, magic squares, and shadows of infinity.
      Universität Innsbruck - Institut für Theoretische Physik, Innsbruck, 2021-12-15.

    • Lecturer(s): De las Cuevas, Gemma: The actual & the possible.
      Universität Konstanz, Konstanz, 2021-12-01.

    • Lecturer(s): De las Cuevas, Gemma: From simplicity to universality.
      Johannes Kepler Universität (JKU) Linz, Linz, 2021-06-21.

    • Lecturer(s): De las Cuevas, Gemma: The grammar of machines and spin models.
      Karl-Franzens-Universität Graz, Graz, 2021-05-07.

    • Lecturer(s): De las Cuevas, Gemma: The unbearable lightness of universality and undecidability.
      Ludwig-Maximilians-Universität München (LMU), München, 2021-04-21. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Universality everywhere: from spin models to automata, and beyond.
      Universitat Autònoma de Barcelona / Autonome Universität Barcelona, Barcelona, 2021-03-11.

    • Lecturer(s): De las Cuevas, Gemma: Universality everywhere: from spin models to automata, and beyond.
      Università degli Studi di Trento / University of Trento / Universität Trient, Trento / Trient, 2021-03-03.

    Presentations for the general public

    Public Lecture
    • De las Cuevas, Gemma: What is reality?
      Palau Macaya, Barcelona, 2021-10-27 - 2021-10-28. (Web link)



    Publications 2020

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • Balanzo-Juando, Maria; De Las Cuevas, Gemma (2020): A generalized ansatz for continuous Matrix Product States.
      In: Physical Review A (Atomic, Molecular and Optical Physics) 101/5, No. 052312. (DOI) (Web link)

    • De las Cuevas, G.; Drescher, T.; Netzer, T. (2020): Quantum magic squares: dilations and their limitations.
      In: Journal of Mathematical Physics 61, No. 111704. (DOI) (Web link)

    • De las Cuevas, G.; Fritz, T.; Netzer, T. (2020): Optimal bounds on the positivity of a matrix from a few moments.
      In: Communications in Mathematical Physics 375, pp. 105 - 126. (DOI) (Web link)

    • De las Cuevas, Gemma; Netzer, Tim (2020): Mixed states in one spatial dimension: decompositions and correspondence with nonnegative matrices.
      In: Journal of Mathematical Physics 61/4, No. 041901. (DOI) (Web link)



    Lectures 2020

    Presentations at Conferences, Symposia, etc.

    Conference Lecture (Invited Lecture)
    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata and neural networks - ONLINE.
      QNLP20-Quantum Natural Language Processing, Cambridge, 2020-09-21. (Web link)

    Conference Lecture (Upon Registration)
    • Lecturer(s): De las Cuevas, Gemma Co-author(s): Lewis, Martha; Netzer, Tim; Klingler, Andreas: Cats climb entails mammals move: preserving hyponymy in distributional semantics.
      SEMSPACE 2020, Amsterdam, 2020-08-07. (Web link)

    • Lecturer(s): Klingler, Andreas Co-author(s): Netzer, Tim; De Las Cuevas, Gemma: Approximate tensor decompositions: disappearance of all separations.
      15th Conference on the Theory of Quantum Computation, Communication and Cryptography (TQC 2020), Riga, 2020-06-12. (Web link)

    Guest Lectures

    Guest Lecture
    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata, neural networks, and beyond - Online.
      Johannes Kepler Universität (JKU) Linz, Linz, 2020-12-09. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata, neural networks, and beyond.
      ETH Zürich, Zürich, 2020-11-23.

    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata, neural networks, and beyond.
      Universität Innsbruck, Innsbruck, 2020-11-19.

    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata, neural networks and beyond - Online.
      Universität Innsbruck - Fakultät für Mathematik, Informatik, Physik (MIP), Innsbruck, 2020-11-11.

    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata, neural networks and beyond - Online.
      University of Waterloo, Waterloo, 2020-10-27.

    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata, neural networks and beyond - Online.
      Institute for Cross-Disciplinary Physics and Complex Systems (IFISC), Mallorca, 2020-10-21. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Universality in spin models, automata, neural networks, and beyond - Online.
      Universität Konstanz, Konstanz, 2020-09-03.



    Publications 2019

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Drescher, T.; Netzer, T. (2019): Separability for mixed states with operator Schmidt rank two.
      In: Quantum. The Open Journal for Quantum Science 3, No. 203. (DOI) (Web link)



    Lectures 2019

    Presentations at Conferences, Symposia, etc.

    Conference Lecture (Invited Lecture)
    • Lecturer(s): De las Cuevas, Gemma: Universality: From Spin Models to Automata.
      Quantum Natural Language Processing (QNLP 2019), Oxford, 2019-12-05. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Local descriptions of mixed states.
      Focus week on tensor networks, Madrid, 2019-09-20. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Local descriptions of mixed states.
      Workshop: ICMS Analytical and combinatorial aspects of quantum information theory, Edinburgh, 2019-09-10. (Web link)

    • Lecturer(s): De Las Cuevas, Gemma: Mixed states with tensor networks: challenges and new results.
      Quantum Simulation: Gauge fields, Holography, and Topology, Bilbao, 2019-07-10. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Matrix product density operators of bond dimension two are separable.
      SFB-FoQuS International Conference, Innsbruck, 2019-02-07. (Web link)

    Guest Lectures

    Guest Lecture
    • Lecturer(s): De las Cuevas, Gemma: Local descriptions of mixed states.
      Université Toulouse III - Paul Sabatier, Toulouse, 2019-12-12. (Web link)

    • Lecturer(s): De las Cuevas, Gemma: Local descriptions of mixed states.
      Österreichische Akademie der Wissenschaften - Institut für Quantenoptik und Quanteninformation (IQOQI), Wien / Innsbruck, 2019-08-13.



    Publications 2018

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Schuch, N.; Perez-Garcia, D.; Cirac, J. I. (2018): Continuum limits of Matrix Product States.
      In: Physical Review B (Condensed Matter) 98, No. 174303. (DOI)



    Publications 2017

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Cirac, J. I.; Schuch, N.; Perez-Garcia, D. (2017): Irreducible forms of Matrix Product States: Theory and Applications.
      In: Journal of Mathematical Physics 58/12, No. 121901. (DOI) (Web link)

    • Tura, J.; De las Cuevas, G.; Augusiak, R.; Lewenstein, M.; Acín, A.; Cirac, J. I. (2017): Energy as a Detector of Nonlocality of Many-Body Spin Systems.
      In: Physical Review X 7/2, No. 021005. (DOI)



    Publications 2016

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Cubitt, T. S. (2016): Simple universal models capture all classical spin physics.
      In: Science 351/6278, pp. 1180 - 1183. (DOI)

    • De las Cuevas, G.; Cubitt, T. S.; Cirac, J. I.; Wolf, M. M.; Pérez-García, D. (2016): Fundamental limitations in the purifications of tensor networks.
      In: Journal of Mathematical Physics 57/7, Nr. 071902. (DOI)



    Lectures 2016

    Presentations at Conferences, Symposia, etc.

    Conference Lecture (Invited Lecture)
    • Lecturer(s): De las Cuevas, G.: Simple universal models capture all classical spin physics.
      Last Frontiers in Quantum Information Science 4 (LFQIS 2016), Juneau, Alaska, 2016-06-22. (Web link)

    Lecture at Summer-/Winterschool
    • Lecturer(s): De las Cuevas, G.: An introduction to tensor networks.
      Introductory Course on Quantum Information, Innsbruck, 2016-07-14. (Web link)

    Lecture at Project Meeting / Research Cooperation Meeting
    • Lecturer(s): De las Cuevas, G.: Continuous limits of matrix product states.
      MPQ Theory Group workshop, Ötz, 2016-05-02.

    Guest Lectures

    Guest Lecture
    • Lecturer(s): De las Cuevas, G.: Simple universal models capture all classical spin physics.
      Institut de Ciències Fotòniques (ICFO)/ Institute of Photonic Sciences, Barcelona, 2016-07-18. (Web link)

    • Lecturer(s): De las Cuevas, G.: Simple universal models capture all classical spin physics.
      Johannes-Gutenberg-Universität Mainz, Mainz, 2016-05-19. (Web link)



    Publications 2014

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • Weinfurtner, S.; De las Cuevas, G.; Martin-Delgado, M. A.; Briegel, Hans J. (2014): Reducing space-time to binary information.
      In: Journal of Physics A-Mathematical and Theoretical 47/9, No. 095301. (DOI)



    Publications 2012

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • Briegel, Hans J.; De las Cuevas, G. (2012): Projective simulation for artificial intelligence.
      In: Scientific Reports 2, Art. no. 400. (DOI) (Web link)



    Publications 2011

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • Xu, Y.; De las Cuevas, G.; Dür, Wolfgang; Briegel, Hans J.; Martin-Delgado, M. A. (2011): The U(1) Lattice Gauge Theory Universally Connects All Classical Models with Continuous Variables, Including Background Gravity.
      In: Journal of Statistical Mechanics: Theory and Experiment 2011/February, p. P02013. (DOI)



    Publications 2010

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Dür, Wolfgang; Briegel, Hans J.; Martin-Delgado, M. A. (2010): Mapping all classical spin models to a lattice gauge theory.
      In: New Journal of Physics 12, p. 043014. (DOI)



    Publications 2009

    Contributions to Books / Journals

    Journal Article (Original Paper)
    • De las Cuevas, G.; Dür, Wolfgang; Briegel, Hans J.; Martin-Delgado, M. A. (2009): Unifying All Classical Spin Models in a Lattice Gauge Theory.
      In: Physical Review Letters 102/23, pp. 230502 - 230506. (DOI) (Web link)

    • De las Cuevas, G.; Dür, Wolfgang; Van den Nest, M.; Briegel, Hans J. (2009): Completeness of classical spin models and universal quantum computation.
      In: Journal of Statistical Mechanics: Theory and Experiment 07, p. P07001. (DOI) (Web link)



    Lectures 2009

    Presentations at Conferences, Symposia, etc.

    Poster Presentation
    • Lecturer(s): De las Cuevas, G. Co-author(s): Dür, Wolfgang; Briegel, Hans J.; Martin-Delgado, M. A.: Unifying all classical spin models in a lattice gauge theory.
      International Conference on Scalable Quantum Computing with Light and Atoms, Cortina d'Ampezzo, 2009-02-15. (Web link)



    Lectures 2008

    Presentations at Conferences, Symposia, etc.

    Poster Presentation
    • Lecturer(s): De las Cuevas, G. Co-author(s): Van den Nest, M.; Dür, Wolfgang; Briegel, Hans J.: Completeness of classical spin models and universal quantum computation.
      ESF-FWF-LFIU Conference on Quantum Optics: From Photons and Atoms to Molecules and Solid State Systems, Obergurgl, 2008-02-26.

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