Tension as a perturbative parameter in nonlinear string equations in curved spacetime

نویسندگان

چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

3 v 1 4 J un 1 99 6 Tension as a perturbative parameter in non – linear string equations in curved space – time

A perturbation theory with respect to the tension parameter γ/α ′ for the non–linear equations of string, moving in curved space–time, is considered. Obtained are linearized motion equations for the functions of the n−th degree of approximation (n = 0, 1, 2). The study of string dynamics in curved space–time has evoked considerable interest [1–3]. The investigation of this problem is hampered b...

متن کامل

Heterotic String Models in Curved Spacetime

We explore the possibility of string theories in only four spacetime dimensions without any additional compactified dimensions. We show that, provided the theory is defined in curved spacetime that has a cosmological interpration, it is possible to construct consistent heterotic string theories based on a few non-compact current algebra cosets. We classify these models. The gauge groups that em...

متن کامل

String Model in Curved Spacetime and Exact Conformal Results

Pursuing further the recent methods in the algebraic Hamiltonian approach to gauged WZW models, we apply them to the bosonic SL(2, IR) −k ′ ⊗SU (2) k /(IR⊗˜IR) model recently investigated by Nappi and Witten. We find the global space and compute the conformally exact metric and dilaton fields to all orders in the 1/k expansion. The semiclassical limit k ′ , k → ∞ of our exact results agree with...

متن کامل

Solution of the Sl(2,r) String in Curved Spacetime

The SL(2,R) WZW model, one of the simplest models for strings propagating in curved space time, was believed to be non-unitary in the algebraic treatment involving affine current algebra. It is shown that this was an error that resulted from neglecting a zero mode that must be included to describe the correct physics of non-compact WZW models. In the presence of the zero mode the mass-shell con...

متن کامل

On the Evolution Equations for Ideal Magnetohydrodynamics in Curved Spacetime

We examine the problem of the construction of a first order symmetric hyperbolic evolution system for the Einstein-Maxwell-Euler system. Our analysis is based on a 1 + 3 tetrad formalism which makes use of the components of the Weyl tensor as one of the unknowns. In order to ensure the symmetric hyperbolicity of the evolution equations implied by the Bianchi identity, we introduce a tensor of r...

متن کامل

ذخیره 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: Classical and Quantum Gravity

سال: 1996

ISSN: 0264-9381,1361-6382

DOI: 10.1088/0264-9381/13/9/003