Jan Ambjørn

Jan Ambjørn

Professor, emeritus

ORCID: 0000-0003-3782-089X

Publication year:
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  1. 2023
  2. Published

    The large-scale structure of the universe from a modified Friedmann equation

    Ambjørn, Jan & Watabiki, Y., 30 Apr 2023, In: Modern Physics Letters A. 38, 12n13, 14 p., 2350068.

    Research output: Contribution to journal › Journal article › Research › peer-review

  3. 2022
  4. Published

    Topology induced first-order phase transitions in lattice quantum gravity

    Ambjørn, Jan, Gizbert-Studnicki, J., Gorlich, A. & Nemeth, D., 3 Apr 2022, In: Journal of High Energy Physics (Online). 2022, 04, 20 p., 103.

    Research output: Contribution to journal › Journal article › Research › peer-review

  5. Published

    Easing the Hubble constant tension

    Ambjørn, Jan & Watabiki, Y., 1 Mar 2022, In: Modern Physics Letters A. 37, 07, 2250041.

    Research output: Contribution to journal › Journal article › Research › peer-review

  6. 2021
  7. Published

    Matter-Driven Change of Spacetime Topology

    Ambjørn, Jan, Drogosz, Z., Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Nemeth, D., 12 Oct 2021, In: Physical Review Letters. 127, 16, 5 p., 161301.

    Research output: Contribution to journal › Letter › Research › peer-review

  8. Published

    Scalar fields in causal dynamical triangulations

    Ambjørn, Jan, Drogosz, Z., Gizbert-Studnicki, J., Görlich, A., Jurkiewicz, J. & Nemeth, D., 16 Sep 2021, In: Classical and Quantum Gravity. 38, 60 p., 195030.

    Research output: Contribution to journal › Journal article › Research › peer-review

  9. Published

    Cosmic voids and filaments from quantum gravity

    Ambjørn, Jan, Drogosz, Z., Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Nemeth, D., Aug 2021, In: European Physical Journal C. 81, 8, 5 p., 708.

    Research output: Contribution to journal › Journal article › Research › peer-review

  10. Published

    The susceptibility exponent of Nambu-Goto strings

    Ambjørn, Jan & Makeenko, Y., 21 Jun 2021, In: Modern Physics Letters A. 36, 19, 11 p., 2150136.

    Research output: Contribution to journal › Journal article › Research › peer-review

  11. Published

    Wormholes in 2d Horava-Lifshitz quantum gravity

    Ambjørn, Jan, Hiraga, Y., Ito, Y. & Sato, Y., 10 May 2021, In: Physics Letters B. 816, 5 p., 136205.

    Research output: Contribution to journal › Journal article › Research › peer-review

  12. Published

    Properties of dynamical fractal geometries in the model of causal dynamical triangulations

    Ambjørn, Jan, Drogosz, Z., Gorlich, A. & Jurkiewicz, J., 27 Apr 2021, In: Physical Review D. 103, 8, 17 p., 086022.

    Research output: Contribution to journal › Journal article › Research › peer-review

  13. Published

    CDT Quantum Toroidal Spacetimes: An Overview

    Ambjørn, Jan, Drogosz, Z., Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Nemeth, D., 26 Mar 2021, In: Universe. 7, 4, 26 p., 79.

    Research output: Contribution to journal › Review › Research › peer-review

  14. Published

    Wormholes, a fluctuating cosmological constant and the Coleman mechanism

    Ambjørn, Jan, Sato, Y. & Watabiki, Y., 2 Jan 2021, In: Physics Letters B. 815, 5 p., 136152.

    Research output: Contribution to journal › Journal article › Research › peer-review

  15. 2020
  16. Published

    Renormalization in Quantum Theories of Geometry

    Ambjørn, Jan, Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Loll, R., 9 Jul 2020, In: Frontiers in Physics. 8, 12 p., 247.

    Research output: Contribution to journal › Journal article › Research › peer-review

  17. Published

    Models of the universe based on Jordan algebras

    Ambjørn, Jan & Watabiki, Y., 1 Jun 2020, In: Nuclear Physics B. 955, 54 p., 115044.

    Research output: Contribution to journal › Journal article › Research › peer-review

  18. Published

    Towards elucidation of zero-temperature criticality of the Ising model on 2D dynamical triangulations

    Ambjørn, Jan, Sato, Y. & Tanaka, T., 18 May 2020, In: Physical Review D. 101, 10, 12 p., 106019.

    Research output: Contribution to journal › Journal article › Research › peer-review

  19. Published

    The higher-order phase transition in toroidal CDT

    Ambjørn, Jan, Czelusta, G., Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Nemeth, D., 7 May 2020, In: Journal of High Energy Physics. 2020, 5, 18 p., 030.

    Research output: Contribution to journal › Journal article › Research › peer-review

  20. 2019
  21. Published

    Critical phenomena in causal dynamical triangulations

    Ambjørn, Jan, Coumbe, D., Gizbert-Studnicki, J., Gorlich, A. & Jurkiewicz, J., 15 Oct 2019, In: Classical and Quantum Gravity. 36, 22, 40 p., 224001.

    Research output: Contribution to journal › Journal article › Research › peer-review

  22. Published

    Towards an UV fixed point in CDT gravity

    Ambjørn, Jan, Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Nemeth, D., 29 Jul 2019, In: Journal of High Energy Physics. 2019, 7, 18 p., 166.

    Research output: Contribution to journal › Journal article › Research › peer-review

  23. Published

    Pseudo-Cartesian coordinates in a model of Causal Dynamical Triangulations

    Ambjørn, Jan, Drogosz, Z., Gizbert-Studnicki, J., Gorlich, A. & Jurkiewicz, J., 30 Apr 2019, In: Nuclear Physics B. 943, 18 p., 114626.

    Research output: Contribution to journal › Journal article › Research › peer-review

  24. 2018
  25. Published

    Spectral curves for hypergeometric Hurwitz numbers

    Ambjørn, Jan & Chekhov, L. O., 23 Jul 2018, In: Journal of Geometry and Physics. 132, p. 382-392 11 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  26. Published

    The phase structure of causal dynamical triangulations with toroidal spatial topology

    Ambjørn, Jan, Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Nemeth, D., 21 Jun 2018, In: Journal of High Energy Physics. 2018, 6, 23 p., 111.

    Research output: Contribution to journal › Journal article › Research › peer-review

  27. Published

    Perturbed generalized multicritical one-matrix models

    Ambjørn, Jan, Chekhov, L. & Makeenko, Y., Mar 2018, In: Nuclear Physics B. 928, p. 1-20 20 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  28. 2017
  29. Published

    A modified Friedmann equation

    Ambjørn, Jan & Watabiki, Y., 28 Dec 2017, In: Modern Physics Letters A. 32, 40, 1750224.

    Research output: Contribution to journal › Journal article › Research › peer-review

  30. Published

    The use of Pauli-Villars regularization in string theory

    Ambjørn, Jan & Makeenko, Y., 10 Nov 2017, In: International Journal of Modern Physics A. 32, 31, 1750187.

    Research output: Contribution to journal › Journal article › Research › peer-review

  31. Published

    Scattering amplitudes of regularized bosonic strings

    Ambjørn, Jan & Makeenko, Y., 30 Oct 2017, In: Physical Review D. 96, 8, 086024.

    Research output: Contribution to journal › Journal article › Research › peer-review

  32. Published

    Four-dimensional CDT with toroidal topology

    Ambjørn, Jan, Gizbert-Studnicki, J., Gorlich, A., Grosvenor, K. & Jurkiewicz, J., 8 Aug 2017, In: Nuclear Physics B. 922, p. 226-246

    Research output: Contribution to journal › Journal article › Research › peer-review

  33. Published

    Creating 3, 4, 6 and 10-dimensional spacetime from W3 symmetry

    Ambjørn, Jan & Watabiki, Y., 10 Jul 2017, In: Physics Letters B. 770, p. 252-256

    Research output: Contribution to journal › Journal article › Research › peer-review

  34. Published

    Stability of the nonperturbative bosonic string vacuum

    Ambjørn, Jan & Makeenko, Y., 10 Jul 2017, In: Physics Letters B. 770, p. 352-356

    Research output: Contribution to journal › Journal article › Research › peer-review

  35. Published

    New higher-order transition in causal dynamical triangulations

    Ambjørn, Jan, Coumbe, D., Gizbert-Studnicki, J., Gorlich, A. & Jurkiewicz, J., 16 Jun 2017, In: Physical Review D. 95, 12, 124029.

    Research output: Contribution to journal › Journal article › Research › peer-review

  36. Published

    CDT and the big bang

    Ambjørn, Jan & Watabiki, Y., 1 Apr 2017, In: Acta Physica Polonica B, Proceedings Supplement. 10, 2, p. 299-303

    Research output: Contribution to journal › Conference article › Research › peer-review

  37. Published

    Characteristics of the new phase in CDT

    Ambjørn, Jan, Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J., Klitgaard, N. & Loll, R., 9 Mar 2017, In: European Physical Journal C. 77, 3, 152.

    Research output: Contribution to journal › Journal article › Research › peer-review

  38. 2016
  39. Published

    Impact of topology in causal dynamical triangulations quantum gravity

    Ambjørn, Jan, Drogosz, Z., Gizbert-Studnicki, J., Gorlich, A., Jurkiewicz, J. & Nemeth, D., 8 Aug 2016, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 94, 4, 044010.

    Research output: Contribution to journal › Journal article › Research › peer-review

  40. Published

    Searching for a continuum limit in causal dynamical triangulation quantum gravity

    Ambjørn, Jan, Coumbe, D. N., Gizbert-Studnicki, J. & Jurkiewicz, J., 17 May 2016, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 93, 10, 104032.

    Research output: Contribution to journal › Journal article › Research › peer-review

  41. Published

    String theory as a Lilliputian world

    Ambjørn, Jan & Makeenko, Y., 10 May 2016, In: Physics Letters B. 756, p. 142-146

    Research output: Contribution to journal › Journal article › Research › peer-review

  42. Published

    Scaling behavior of regularized bosonic strings

    Ambjørn, Jan & Makeenko, Y., 22 Mar 2016, In: Physical Review D - Particles, Fields, Gravitation and Cosmology. 93, 6, 066007.

    Research output: Contribution to journal › Journal article › Research › peer-review

  43. Published

    Generalized multicritical one-matrix models

    Ambjørn, Jan, Budd, T. & Makeenko, Y., 2016, In: Nuclear Physics, Section B. 913, p. 357-380 24 p.

    Research output: Contribution to journal › Journal article › Research › peer-review

  44. 2015
  45. Published

    A model for emergence of space and time

    Ambjørn, Jan & Watabiki, Y., 7 Oct 2015, In: Physics Letters B. 749, p. 149-152

    Research output: Contribution to journal › Journal article › Research › peer-review

  46. Published

    Signature change of the metric in CDT quantum gravity?

    Ambjørn, Jan, Coumbe, D. N., Gizbert-Studnicki, J. & Jurkiewicz, J., 7 Aug 2015, In: Journal of High Energy Physics (Online). 2015, 8, 033.

    Research output: Contribution to journal › Journal article › Research › peer-review

  47. Published

    Wilson loops in nonperturbative quantum gravity

    Ambjørn, Jan, Gorlich, A., Jurkiewicz, J. & Loll, R., 7 Jul 2015, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 92, 2, 024013.

    Research output: Contribution to journal › Journal article › Research › peer-review

  48. Published

    Matrix model for strings beyond the c=1 barrier: The spin-s Heisenberg model on random surfaces

    Ambjørn, Jan, Khachatryan, S. & Sedrakyan, A., 6 Jul 2015, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 92, 2, 026002.

    Research output: Contribution to journal › Journal article › Research › peer-review

  49. Published

    The microscopic structure of 2D CDT coupled to matter

    Ambjørn, Jan, Gorlich, A., Jurkiewicz, J. & Zhang, H., 30 Jun 2015, In: Physics Letters B. 746, p. 359-364

    Research output: Contribution to journal › Journal article › Research › peer-review

  50. Published

    The spectral dimension in 2D CDT gravity coupled to scalar fields

    Ambjørn, Jan, Gorlich, A., Jurkiewicz, J. & Zhang, H., 30 Apr 2015, In: Modern Physics Letters A. 30, 13, 1550077.

    Research output: Contribution to journal › Journal article › Research › peer-review

  51. Published

    A c=1 phase transition in two-dimensional CDT/Horava-Lifshitz gravity?

    Ambjørn, Jan, Gorlich, A., Jurkiewicz, J. & Zhang, H., 9 Apr 2015, In: Physics Letters B: Particle Physics, Nuclear Physics and Cosmology. 743, p. 435-439

    Research output: Contribution to journal › Journal article › Research › peer-review

  52. Published

    Exploring the spectrum of regularized bosonic string theory

    Ambjørn, Jan & Makeenko, Y., 1 Mar 2015, In: Journal of Experimental and Theoretical Physics. 120, 3, p. 470-476

    Research output: Contribution to journal › Journal article › Research › peer-review

  53. 2014
  54. Published

    A MATRIX MODEL FOR HYPERGEOMETRIC HURWITZ NUMBERS

    Ambjørn, Jan & Chekhov, L. O., 1 Dec 2014, In: Teoreticheskaya i Matematicheskaya Fizika. 181, 3, p. 1486-1498

    Research output: Contribution to journal › Journal article › Research › peer-review

  55. Published

    Geodesic distances in Liouville quantum gravity

    Ambjørn, Jan & Budd, T. G., 1 Dec 2014, In: Nuclear Physics, Section B. 889, p. 676-691

    Research output: Contribution to journal › Journal article › Research › peer-review

  56. Published

    Two-dimensional causal dynamical triangulations with gauge fields

    Ambjørn, Jan & Ipsen, A. C., 24 Sep 2014, In: Physical Review D (Particles, Fields, Gravitation and Cosmology). 88, 6, 5 p., 067502.

    Research output: Contribution to journal › Journal article › Research › peer-review

  57. Published

    Scale-dependent Hausdorff dimensions in 2d gravity

    Ambjørn, Jan, Budd, T. & Watabiki, Y., 7 Sep 2014, In: Physics Letters B: Particle Physics, Nuclear Physics and Cosmology. 736, p. 339-343

    Research output: Contribution to journal › Journal article › Research › peer-review

  58. Published

    Renormalization group flow in CDT

    Ambjørn, Jan, Goerlich, A., Jurkiewicz, J., Kreienbuehl, A. & Loll, R., 21 Aug 2014, In: Classical and Quantum Gravity. 31, 16, 165003.

    Research output: Contribution to journal › Journal article › Research › peer-review

  59. Published

    A note on the Lee-Yang singularity coupled to 2d quantum gravity

    Ambjørn, Jan, Gorlich, A., Ipsen, A. C. & Zhang, H. -., 30 Jul 2014, In: Physics Letters B: Particle Physics, Nuclear Physics and Cosmology. 735, p. 191-194

    Research output: Contribution to journal › Journal article › Research › peer-review

  60. Published

    The effective action in 4-dim CDT. The transfer matrix approach

    Ambjørn, Jan, Gizbert-Studnicki, J., Görlich, A. & Jurkiewicz, J., 6 Jun 2014, In: Journal of High Energy Physics (Online). 2014, 6, 034.

    Research output: Contribution to journal › Journal article › Research › peer-review

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