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7 papers · 2 filters
A Class of String Backgrounds as a Semiclassical Limit of WZW Models
D. I. Olive, E. Rabinovici, A. Schwimmer
A class of string backgrounds associated with non semi-simple groups is obtained as a special large level limit of ordinary WZW models. The models have an integer Virasoro central…
Faster than light' photons and charged black holes
R. D. Daniels, G. M. Shore
Photons propagating in curved spacetime may, depending on their direction and polarisation, have velocities exceeding the ``speed of light'' c. This phenomenon arises through vacuu…
Maverick Examples Of Coset Conformal Field Theories
David C. Dunbar, Keith G. Joshi
We present coset conformal field theories whose spectrum is not determined by the identification current method. In these ``maverick'' cosets there is a larger symmetry identifying…
String-Based Methods in Perturbative Gravity
Z. Bern, D. C. Dunbar, T. Shimada
String theory implies a relatively modest growth in computational complexity for perturbative gravity calculations as compared to gauge theory calculations, contrary to field theor…
Crossing and Antisolitons in Affine Toda Theories
Marco A. C. Kneipp, David I. Olive
Affine Toda theory is a relativistic integrable theory in two dimensions possessing solutions describing a number of different species of solitons when the coupling is chosen to be…
Affine Toda Solitons and Vertex Operators
D. I. Olive, N. Turok, J. W. R. Underwood
Affine Toda theories with imaginary couplings associate with any simple Lie algebra generalisations of Sine Gordon theory which are likewise integrable and possess solito…