منابع مشابه
Quantum Entanglement of Baby Universes
We study quantum entanglements of baby universes which appear in non-perturbative corrections to the OSV formula for the entropy of extremal black holes in Type IIA string theory compactified on the local Calabi-Yau manifold defined as a rank 2 vector bundle over an arbitrary genus G Riemann surface. This generalizes the result for G = 1 in hep-th/0504221. Non-perturbative terms can be organize...
متن کاملBaby universes in string theory
Robbert Dijkgraaf, Rajesh Gopakumar, Hirosi Ooguri, and Cumrun Vafa Institute for Theoretical Physics & KdV Institute for Mathematics, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands Harish-Chandra Research Institute, Chhatnag Road, Jhusi, Allahabad 211019, India California Institute for Technology, 452-48, Pasadena, California 91125, USA Jefferson Physical Labo...
متن کاملBaby Universes in 2d Quantum Gravity
We investigate the fractal structure of 2d quantum gravity, both for pure gravity and for gravity coupled to multiple gaussian fields and for gravity coupled to Ising spins. The roughness of the surfaces is described in terms of baby universes and using numerical simulations we measure their distribution which is related to the string susceptibility exponent γstring.
متن کاملModelling macroscopic and baby universes by fundamental strings
We develop a model of (1 + 1)-dimensional parent and baby universes as macroscopic and microscopic fundamental closed strings. We argue, on the basis of understanding of strings from the point of view of target D-dimensional space-time, that processes involving baby universes/wormholes not only induce c-number ”α-parameters” in (1 + 1)d action, but also lead to loss of quantum coherence for a (...
متن کاملObserving 4 d baby universes in quantum gravity
We measure the fractal structure of four dimensional simplicial quantum gravity by identifying so-called baby universes. This allows an easy determination of the critical exponent γ connected to the entropy of four-dimensional manifolds.
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Physics Letters B
سال: 2011
ISSN: 0370-2693
DOI: 10.1016/j.physletb.2011.10.062