Self-Consistent Wormhole Solutions of Semiclassical Gravity
نویسندگان
چکیده
منابع مشابه
Self-consistent Wormhole Solutions of Semiclassical Gravity
We present the first results of a self-consistent solution of the semiclassical Einstein field equations corresponding to a Lorentzian wormhole coupled to a quantum scalar field. The specific solution presented here represents a wormhole connecting two asymptotically spatially flat regions. In general, the diameter of the wormhole throat, in units of the Planck length, can be arbitrarily large,...
متن کاملWhen is a semiclassical approximation self-consistent?
A general condition for the self-consistency of a semiclassical approximation to a given system is suggested. It is based on the eigenvalue distribution of the relevant Hessian evaluated at the streamline configurations (configurations that almost satisfy the classical equations of motion). The semiclassical approximation is consistent when there exists a gap that separates small and large eige...
متن کاملSemiclassical interpretation of the topological solutions for canonical quantum gravity.
Ashtekar’s formulation for canonical quantum gravity is known to possess the topological solutions which have their supports only on the moduli space N of flat SL(2,C) connections. We show that each point on the moduli spaceN corresponds to a geometric structure, or more precisely the Lorentz group part of a family of Lorentzian structures, on the flat (3+1)-dimensional spacetime. A detailed an...
متن کاملNumerical solutions to dilaton gravity models and the semiclassical singularity.
A general homogeneous two dimensional dilaton gravity model considered recently by Lemos and Sà [1], is given quantum matter Polyakov corrections and is solved numerically for several static, equilibrium scenarii. Classically the dilaton field ranges the whole real line, whereas in the semi-classical theory, with the usual definition, it is always below a certain critical value[2, 3] at which a...
متن کاملConsistency of Semiclassical Gravity
We discuss some subtleties which arise in the semiclassical approximation to quantum gravity. We show that integrability conditions prevent the existence of Tomonaga-Schwinger time functions on the space of three-metrics but admit them on superspace. The concept of semiclassical time is carefully examined. We point out that central charges in the matter sector spoil the consistency of the semic...
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: Physical Review Letters
سال: 1997
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.78.2050