The pre-big bang scenario in string cosmology

Gasperini, M.; Veneziano, G.

doi:10.1016/s0370-1573(02)00389-7

Cited by 786 publications

(1,043 citation statements)

References 584 publications

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“…It is called the pre-big-bang model [26]. However, the ST model is more selfconsistent and complete.…”

Section: Discussionmentioning

confidence: 99%

Probing the cosmological singularity with a particle

Małkiewicz¹,

Piechocki²

2006

Class. Quantum Grav.

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We examine the transition of a particle across the singularity of the compactified Milne (CM) space. Quantization of the phase space of a particle and testing the quantum stability of its dynamics are consistent to one another. One type of transition of a quantum particle is described by a quantum state that is continuous at the singularity. It indicates the existence of a deterministic link between the propagation of a particle before and after crossing the singularity. Regularization of the CM space leads to the dynamics similar to the dynamics in the de Sitter space. The CM space is a promising model to describe the cosmological singularity deserving further investigation by making use of strings and membranes.

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“…It is called the pre-big-bang model [26]. However, the ST model is more selfconsistent and complete.…”

Section: Discussionmentioning

confidence: 99%

Probing the cosmological singularity with a particle

Małkiewicz¹,

Piechocki²

2006

Class. Quantum Grav.

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“…[20,21]). By combining the existence of the dual symmetry and of a minimal length scale, a string-based model can thus complete the standard cosmological scenario by removing the curvature singularity and extending the physical description of the Universe back in time, beyond the big bang, to infinity.…”

Section: String Cosmologymentioning

confidence: 99%

“…[20,21]). This growth of the coupling can be accompanied, in principle, also by a large amount of entropy production (see e.g.…”

Section: String Cosmologymentioning

confidence: 99%

“…1.3), a higher-dimensional Universe tends to be filled by branes which are spontaneously produced in pairs from the high-energy vacuum, and which can gravitationally (and strongly) interact among themselves [21]. According to string theory, on the other hand, the total gravitational force in a higher-dimensional spacetime includes various components: we should mention, in particular, the symmetrictensor contribution associated to the graviton, the scalar contribution associated to the dilaton, and the antisymmetric-tensor contribution associated to the axion (see, e.g., [20,21]). …”

Section: Brane Cosmologymentioning

confidence: 99%

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String Theory and Primordial Cosmology

Gasperini¹

2014

Springer Handbook of Spacetime

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SUMMARY.String cosmology aims at providing a reliable description of the very early Universe in the regime where standard-model physics is no longer appropriate, and where we can safely apply the basic ingredients of superstring models such as dilatonic and axionic forces, duality symmetries, winding modes, limiting sizes and curvatures, higher-dimensional interactions among elementary extended object. The sought target is that of resolving (or at least alleviating) the big problems of standard and inflationary cosmology like the spacetime singularity, the physics of the trans-Planckian regime, the initial condition for inflation, and so on. SUMMARY. String cosmology aims at providing a reliable description of the very early Universe in the regime where standard-model physics is no longer appropriate, and where we can safely apply the basic ingredients of superstring models such as dilatonic and axionic forces, duality symmetries, winding modes, limiting sizes and curvatures, higher-dimensional interactions among elementary extended object. The sought target is that of resolving (or at least alleviating) the big problems of standard and inflationary cosmology like the spacetime singularity, the physics of the trans-Planckian regime, the initial condition for inflation, and so on.

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“…Поскольку экспе-риментальные данные не исключают возможности того, что w < −1 для темной 4 И. Я. АРЕФЬЕВА, И. В. ВОЛОВИЧ энергии, на долю которой по современным данным приходится около 70% всего ве-щества, исследование таких моделей привлекает большое внимание 1) . В моделях, в которых имеет место так называемый "отскок" от космологической сингулярности, NEC также нарушается [2], [11].…”

Section: Introductionunclassified

Об Изотропном Энергетическом Условии И Космологии

Арефьева¹,

Aref’eva²,

Волович³

2008

ТМФ

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Полевые теории, которые нарушают изотропное энергетическое условие, представляют интерес как для решения проблемы космологической сингуляр-ности, так и для моделей космологической темной энергии с параметром урав-нения состояния w < −1. Рассмотрены две недавно предложенные модели, которые нарушают это условие. Модель фантомного конденсата требует выс-ших производных, что приводит к появлению массивного фантома и не ограни-ченной снизу энергии. Дается оценка скорости распада частиц и обсуждаются возможные ограничения на массы, необходимые для того, чтобы обеспечить стабильность частиц в модели фантомного конденсата. Нелокальная струнная модель, которая появляется в кубической полевой струнной теории и прояв-ляет фантомное поведение, также приводит к не ограниченной снизу энергии. В этом случае спектр энергии непрерывен и частицеподобные возбуждения от-сутствуют. Эта модель допускает естественное ультрафиолетовое пополнение, так как она выводится из теории суперструны.

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The pre-big bang scenario in string cosmology

Abstract: We review physical motivations, phenomenological consequences, and open problems of the so-called pre-big bang scenario in superstring cosmology. (C) 2002 Elsevier Science B.V. All rights reserved

Cited by 786 publications

References 584 publications

Probing the cosmological singularity with a particle

Probing the cosmological singularity with a particle

String Theory and Primordial Cosmology

Об Изотропном Энергетическом Условии И Космологии

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