Jan Ambjørn
Professor, emeritus
Theoretical high energy, astroparticle and gravitational physics
Blegdamsvej 17
2100 København Ø
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Sphaleron-like transitions at high temperature
Ambjørn, Jan, 1995, Proc. of NATO Advanced Research Workshop on Electroweak Physics and the Early Universe. p. 271-286Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Sphaleron transitions and Baryon asymmetry: A nummerical, real-time analysis
Ambjørn, Jan, Askgaard, T., Porter, H. & Shaposhnikov, M. E., 15 Apr 1991, In: Nuclear Physics B. 353, 2, p. 346-378Research output: Contribution to journal › Journal article › Research › peer-review
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Quantum Geometry, a statistical field theory approach
Ambjørn, Jan, Durhuus, Bergfinnur & Jonsson, T., 1997, Monographs in Matematical Physics. p. 371Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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The Quantum Spacetime Of c>0 2d Gravity
Ambjørn, Jan, Anagnostopoulos, K. N. & Thorleifsson, G., 1998, In: Nucl. Phys. B (Proc.Suppl.). 63, p. 742-744Research output: Contribution to journal › Journal article › Research
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2D gravity, random surfaces and all that
Ambjørn, Jan, 1991, Lattica 90. Proc.Int.Conf. Lattice Field Theory,Tallahassee, Florida. Amsterdam, p. 701-710Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Dynamical triangulated fermionic surfaces
Ambjørn, Jan & Varsted, S., 28 Mar 1991, In: Physics Letters B. 257, 3-4, p. 305-312Research output: Contribution to journal › Journal article › Research › peer-review
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Three-dimensional Simplical Quantum Gravity Coupled to Ising Matter
Ambjørn, Jan, Burda, Z., Jurkiewicz, J. & Kristjansen, C., 1993, In: Nucl. Phys. B (Proc.Suppl.). 30, p. 771-774Research output: Contribution to journal › Journal article › Research
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Z*U2 Gauge Matter Coupled to 4d Simplicial Quantum Gravity
Ambjørn, Jan, Bilke, S., Burda, Z., Jurkiewicz, J. & Petersson, B., 1994, In: Mod. Phys. Lett.. A9, p. 2527-2533Research output: Contribution to journal › Journal article › Research
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Barriers in Quantum Gravity
Ambjørn, Jan, 1994, String Theory, Gauge Theory and Quantum Gravity 93. Singapore: World Scientific, p. 228-238Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Two-Dimensional Quantum Geometry
Ambjørn, Jan, Nielsen, J. L. & Rolf, J., 1999, In: Fortschr. Phys.. Vol. 47, p. 152-171Research output: Contribution to journal › Journal article › Research › peer-review
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An intergrable model with non-reducible three partical R- matrix
Ambjørn, Jan, Khachatryan, S. & Sedrakyan, A., 2004, In: Journal of Physics A: Mathematical and Theoretical (Print Edition). 37, 30, p. 7397-7406Research output: Contribution to journal › Journal article › Research › peer-review
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Non-perturbative calculation of correlators in 2D quantum gravity
Ambjørn, Jan & Greensite, J., 17 Jan 1991, In: Physics Letters B. 254, 1-2, p. 66-70Research output: Contribution to journal › Journal article › Research › peer-review
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Spontaneous parity breaking in the early universe
Ambjørn, Jan & Farakos, K., 1992, In: Nuclear Physics B. 26, p. 533-535Research output: Contribution to journal › Journal article › Research
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Regularized quantum gravity and string theory
Ambjørn, Jan, 1992, Proc. on Random surfaces and 2-D quantum gravity, Barcelona, 1991... Amsterdam, p. 8-24Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Is the present acceleration of the Universe caused by merging with other universes?
Ambjørn, Jan & Watabiki, Y., 12 Dec 2023, In: Journal of Cosmology and Astroparticle Physics. 2023, 12, 20 p., 011.Research output: Contribution to journal › Journal article › Research › peer-review
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A new approach to three-dimensional quantum gravity..
Ambjørn, Jan & Varsted, S., 1992, Workshop on random surfaces and 2-D quantum gravity, Barcelona, 1991. Amsterdam, p. 25-30Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Two obstacles in quantum gravity
Ambjørn, Jan, 1995, Proc. of the conference "Strings '93". p. 387-396Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
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Noncritical String Field Theory for Two-D Quantum Gravity coupled to (p, q) Conformal Fields
Ambjørn, Jan & Watabiki, Y., 1997, In: Int. J. Mod. Phys.. A12, p. 4257-4289Research output: Contribution to journal › Journal article › Research
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3-D lorentzian quantum gravity from the asymmetric ABAB matrix model
Ambjørn, Jan, Jurkiewicz, J., Loll, R. & Vernizzi, G., 2003, In: Acta Physica Polonica B. 34, 10, p. 4667-4688Research output: Contribution to journal › Journal article › Research › peer-review
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Quantum Geometry
Ambjørn, Jan, 1999, Geometry in Present Day Science. p. 1-20Research output: Chapter in Book/Report/Conference proceeding › Report chapter › Communication
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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
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Asymptotic freon: An example on electroweak magnetism
Ambjørn, Jan & Olesen, Poul, 1990, In: Acta Physica Polonica B. 21, 2, p. 109-117Research output: Contribution to journal › Journal article › Research › peer-review
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New Monte Carlo simulations
Ambjørn, Jan, Boulatov, F. & Kazakov, V. A., 1990, In: Modern Physics Letters A. 5, p. 771-785Research output: Contribution to journal › Journal article › Research › peer-review
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A solvable 2D gravity Model with Gamma greater than Zero
Ambjørn, Jan, Durhuus, Bergfinnur & Jónsson, T., 1994, In: Modern Physics Letters A. 9, p. 1221-1228Research output: Contribution to journal › Journal article › Research › peer-review
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Problems in Quantum Gravity
Ambjørn, Jan, 1994, Proceedings of the Workshop on Strings, Topological Field Theory and Matrix Models. Moscow, p. 241-250Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research
ID: 5868
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Signature change of the metric in CDT quantum gravity?
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A model for emergence of space and time
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String theory as a Lilliputian world
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