# TACHYONS IN DE SITTER SPACE AND ANALYTICAL CONTINUATION FROM dS/CFT TO AdS/CFT

@article{Cadoni2004TACHYONSID, title={TACHYONS IN DE SITTER SPACE AND ANALYTICAL CONTINUATION FROM dS/CFT TO AdS/CFT}, author={Mariano Cadoni and Paolo Carta}, journal={International Journal of Modern Physics A}, year={2004}, volume={19}, pages={4985-5001} }

We discuss analytic continuation from d-dimensional Lorentzian de Sitter (dSd) to d-dimensional Lorentzian anti-de Sitter (AdSd) space–time. We show that AdSd, with opposite signature of the metric, can be obtained as analytic continuation of a portion of dSd. This implies that the dynamics of (positive square-mass) scalar particles in AdSd can be obtained from the dynamics of tachyons in dSd. We discuss this correspondence both at the level of the solution of the field equations and of the…

## 8 Citations

### Massive gravitino propagator in maximally symmetric spaces and fermions in dS/CFT

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We extend the method of calculation of propagators in maximally symmetric spaces (Minkowski, dS, AdS and their euclidean versions) in terms of intrinsic geometric objects to the case of massive spin…

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A bstractWe show that analytical continuation maps scalar solitonic solutions of Einstein-scalar gravity, interpolating between an hyperscaling violating and an Anti de Sitter (AdS) region, in flat…

### De Sitter scattering amplitudes in the Born approximation

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We present a covariant framework to compute scattering amplitudes and
potentials in a de Sitter background. In this setting, we compute the
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### Singularities in and Stability of Ooguri-Vafa-Verlinde Cosmologies

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Ooguri, Vafa, and Verlinde have recently proposed an approach to string cosmology which is based on the idea that cosmological string moduli should be selected by a Hartle-Hawking wave function. They…

### The Geometry of The Entropic Principle and the Shape of the Universe

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- 2006

Ooguri, Vafa, and Verlinde have outlined an approach to two-dimensional accelerating string cosmology which is based on topological string theory, the ultimate objective being to develop a…

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