Emergent gravity from the IIB matrix model and cancellation of a cosmological constant

Klinkhamer, F. R.

doi:10.1088/1361-6382/accef5

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…For other work on emergent gravity from the IKKT matrix model the reader is referred to [219][220][221].…”

Section: Jcap11(2023)019mentioning

confidence: 99%

Superstring cosmology — a complementary review

Brandenberger

2023

J. Cosmol. Astropart. Phys.

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In this review, a number of approaches to superstring cosmology which make use of key features which distinguish string theory from point particle theories are discussed, with particular emphasis on emergent scenarios. One motivation for the discussion is the realization that, in order to describe the evolution of the very early universe, it is necessary to go beyond a conventional effective field theory (EFT) analysis. Some of the conceptual problems of an EFT analysis will be discussed. The review begins with a summary of the criteria for a successful early universe scenario, emphasizing that cosmic inflation is not the only scenario of early universe cosmology which is consistent with current cosmological observations. Bouncing and emergent scenarios as interesting alternatives are introduced. Some realizations of these scenarios from superstring theory are reviewed, e.g. String Gas Cosmology, the Pre-Big-Bang scenario, the Ekpyrotic model, Double Field Theory cosmology and matrix model cosmology. In light of the difficulties in obtaining cosmic inflation from string theory (at the level of EFT), and realizing that there are promising examples of alternative early universe scenarios which are derived from basic principles of superstring theory, one must entertain the possibility that the cosmology emerging from string theory will not involve an extended period of accelerated expansion.

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“…For other work on emergent gravity from the IKKT matrix model the reader is referred to [219][220][221].…”

Section: Jcap11(2023)019mentioning

confidence: 99%

Superstring cosmology — a complementary review

Brandenberger

2023

J. Cosmol. Astropart. Phys.

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Regularization of Matrices in the Covariant Derivative Interpretation of Matrix Models

Hattori,

Mizuno,

Tsuchiya

2024

Progress of Theoretical and Experimental Physics

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We study regularization of matrices in the covariant derivative interpretation of matrix models, a typical example of which is the type IIB matrix model. The covariant derivative interpretation provides a possible way in which curved spacetimes are described by matrices, which are viewed as differential operators. One needs to regularize the operators as matrices with finite size in order to apply the interpretation to nonperturbative calculations such as numerical simulations. We develop a regularization of the covariant derivatives in two dimensions by using the Berezin-Toeplitz quantization. As examples, we examine the cases of S2 and T2 in details.

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Emergent gravity from the IIB matrix model and cancellation of a cosmological constant

Cited by 2 publications

References 43 publications

Superstring cosmology — a complementary review

Superstring cosmology — a complementary review

Regularization of Matrices in the Covariant Derivative Interpretation of Matrix Models

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