2D black holes, Bianchi I cosmologies, and 
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Codina, Tomas; Hohm, Olaf; Zwiebach, Barton

doi:10.1103/physrevd.108.026014

Cited by 6 publications

(2 citation statements)

References 35 publications

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“…Moreover, the curvature singularities of two-dimensional string black hole are also resolved in refs. [16][17][18]. This paper is an extended version of our previous letter [16].…”

Section: Introductionmentioning

confidence: 88%

Three dimensional regular black string via loop corrections

Ying

2023

J. High Energ. Phys.

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It is well known that some spacetime singularities of low energy effective action can be resolved by the effective loop corrections. However, the known potentials for the loop corrections fail to regulate the singularity of three dimensional black string. An alternative method is to introduce an extra flat spatial direction and boost away the singularity by using the O(d, d) rotation with the special Kalb-Ramond field. In this paper, we investigate a new set of non-local dilaton potentials for the effective loop corrections. The result shows that the singularity of three dimensional black string can be consistently resolved by the loop corrections.

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“…Moreover, the curvature singularities of two-dimensional string black hole are also resolved in refs. [16][17][18]. This paper is an extended version of our previous letter [16].…”

Section: Introductionmentioning

confidence: 88%

Three dimensional regular black string via loop corrections

Ying

2023

J. High Energ. Phys.

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“…Hohm and Zwiebach adressed this issue by assuming that the O(d, d)-duality [3] holds to all orders, obtaining a simple and systematic action for the α ′ -corrections [16,29]. This duality-invariant action is a significant advancement in the context of string cosmology, allowing for a more consistent and robust description of the cosmological evolution [16,17,20,[28][29][30][31][32][33][34][35][36][37].…”

Section: Complete O(d D)-invariant Action To All Orders In α ′ -Corre...mentioning

confidence: 99%

On the stability of string-hole gas

Bitnaya,

Conzinu,

Marozzi

2024

J. Cosmol. Astropart. Phys.

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Focusing on a string-hole gas within the pre-big bang scenario, we study the stability of its solutions in the phase space. We firstly extend the analysis present in the literature relaxing the ideal-gas properties of the string-hole gas, taking into account a (bulk-) viscosity term. Then we consider the case of a theory described by a complete O(d,d)-invariant action up to all orders in α'-corrections (the Hohm-Zwiebach action), studying the stability of the string-hole gas solution with or without the introduction of the viscosity term. Furthermore, the bulk viscosity is also considered for two different first order α'-corrected actions: the Gasperini-Maggiore-Veneziano-action and the Meissner-action. The results obtained show how the viscosity can help to stabilize the string-hole gas solution, obtaining constraints on the equation of state of the gas.

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Large D gravity and low D string via α′ corrections

Ying

2024

J. High Energ. Phys.

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In this paper, we generalize the correspondence between large D gravity and low D string theory to the most general case, including its T-dual solutions. It is well-known that the large D limit of the Schwarzschild-Tangherlini black hole in gravity becomes a two-dimensional near-horizon geometry. Similarly, the large D limit of its T-dual solution, obtained by the Buscher rules, namely the string black hole with a naked singularity, reduces to a two-dimensional near-singularity geometry. Both of these geometries are described by the two-dimensional low-energy effective action of string theory and are related to each other by scale-factor duality. Secondly, we demonstrate that these near-horizon/singuglarity geometries, including complete α′ corrections, can be described by the two-dimensional Hohm-Zwiebach action. This approach allows for the derivation of non-perturbative and non-singular solutions. Furthermore, the Hohm-Zwiebach action provides a systematic way to investigate the α′-corrected near-horizon/singularity geometries of different kinds of black holes, which are difficult to achieve through the Wess-Zumino-Witten (WZW) model method.

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2D black holes, Bianchi I cosmologies, and α′

Cited by 6 publications

References 35 publications

Three dimensional regular black string via loop corrections

Three dimensional regular black string via loop corrections

On the stability of string-hole gas

Large D gravity and low D string via α′ corrections

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