nLab IKKT matrix model




The KK-compactification of D=10 super Yang-Mills theory all the way to the point yields a theory whose fields are simply elements of the gauge Lie algebra 𝔤\mathfrak{g}, hence matrices for a matrix Lie algebra. This physics is called the IKKT matrix model.

Alternatively this model can be motivated from a certain regularization of the worldsheet action functional of the superstring. This is how it was originally obtained in (IKKT 96).

It has been argued that for 𝔤=𝔰𝔲(N)\mathfrak{g} = \mathfrak{su}(N) the special unitary Lie algebra and in the large N limit, this model captures aspects of non-perturbative type IIB string theory (which would be F-theory, see also at M-theory). Therefore this is also called the IIB matrix model (in contrast to the BFSS matrix model in type IIA string theory).

Several authors have explored the possibility to lift the derivation of the IKKT model from the superstring to the M2-brane. See at membrane matrix model for more on this.

In (Kim-Nishimura-Tsuchiya 12) it is claimed that computer simulation of the IKKT matrix model, regarded as non-perturbative type IIB string theory, shows a spontaneous emerging spacetime of macroscopic dimension 3+1, with 6 microscopic dimensions. (A similar claim results from a very different argument: the Brandenberger-Vafa mechanism.)

matrix models for brane dynamics:

D-branematrix model
D0-braneBFSS matrix model,
BMN matrix model
D(-1)-braneIKKT matrix model
D4-branenuclear matrix model
M-branematrix model
D2-branemembrane matrix model

See also:



First inkling of matrix models from the large N limit of QCD:

The original articles on the IKKT matrix model:

See also

Review of the grand perspective with emphasis on noncommutative geometry (fuzzy spheres):

See also at D-brane geometry.

Derivation from open string field theory is discussed in

Arguments that full Yang-Mills theory generalized to noncommutative geometry is recovered as the perturbation theory around classical solutions of the IKKT model are in

  • H. Aoki, Noboyuki Ishibashi, S. Iso, Hikaru Kawai, Y. Kitazawa, T. Tada, Noncommutative Yang-Mills in IIB Matrix Model, Nucl.Phys. B565 (2000) 176-192 (arXiv:hep-th/9908141)

  • Tatsuo Azeyanagi, Masanori Hanada, Tomoyoshi Hirata, On Matrix Model Formulations of Noncommutative Yang-Mills Theories, Phys.Rev.D78:105017,2008 (arXiv:0806.3252)

Emergence of higher spin gravity from the IKKT matrix model:

Arguments that closed string field theory arises from the dynamics of Wilson loops in the IKKT model are in

  • M. Fukuma, Hikaru Kawai, Y. Kitazawa, A. Tsuchiya, String Field Theory from IIB Matrix Model, Nucl.Phys.B510:158-174,1998 (arXiv:hep-th/9705128)

  • Daiji Ennyu, Hiroshi Kawabe, Naohito Nakazawa, Note on a Closed String Field Theory from Bosonic IIB Matrix Model, JHEP 0301 (2003) 025 (arXiv:hep-th/0212044)

Possibilities of generalizing the IKKT model from Lie algebras to Lie 2-algebras in some membrane matrix model are explored in

Discussion of standard model phenomenology within the IKKT model includes

See also

Computer simulation

There are claims that numerical computer simulations (as in lattice gauge theory, see the references there) show that the IKKT matrix model predicts a spontanously generated spacetime where exactly 3+1 dimensions become macroscopic (hence effectively predicts moduli stabilization in spintaneous KK-compactification of M-theory to D=3+1D = 3+1 macroscopic dimensions ):

  • S.-W. Kim, J. Nishimura, and A. Tsuchiya, Expanding (3+1)-dimensional universe from a Lorentzian matrix model for superstring theory in (9+1)-dimensions, Phys. Rev. Lett. 108, 011601 (2012), (arXiv:1108.1540).

  • S.-W. Kim, J. Nishimura, and A. Tsuchiya, Late time behaviors of the expanding universe in the IIB matrix model, JHEP 10, 147 (2012), (arXiv:1208.0711).

  • Yuta Ito, Jun Nishimura, Asato Tsuchiya, Large-scale computation of the exponentially expanding universe in a simplified Lorentzian type IIB matrix model (arXiv:1512.01923)

  • Toshihiro Aoki, Mitsuaki Hirasawa, Yuta Ito, Jun Nishimura, Asato Tsuchiya, On the structure of the emergent 3d expanding space in the Lorentzian type IIB matrix model (arXiv:1904.05914)

  • Kohta Hatakeyama, Akira Matsumoto, Jun Nishimura, Asato Tsuchiya, Atis Yosprakob, The emergence of expanding space-time and intersecting D-branes from classical solutions in the Lorentzian type IIB matrix model (arxiv:1911.08132)

  • Konstantinos N. Anagnostopoulos, Takehiro Azuma, Yuta Ito, Jun Nishimura, Toshiyuki Okubo, Stratos Kovalkov Papadoudis, Complex Langevin analysis of the spontaneous breaking of 10D rotational symmetry in the Euclidean IKKT matrix model (arXiv:2002.07410)

Status report:

  • Progress in the numerical studies of the type IIB matrix model [arXiv:2210.17537]


  • The emergence of expanding space-time in the Lorentzian type IIB matrix model with a novel regularization [arXiv:2307.01681]

Last revised on January 30, 2024 at 05:33:55. See the history of this page for a list of all contributions to it.