Results 21 to 30 of about 9,349 (162)

Quaternionic manifolds for type II superstring vacua of Calabi-Yau spaces [PDF]

Nuclear Physics B, 1990
Abstract In type II theories compactified on Calabi-Yau manifolds the moduli fields are accompanied by (Ramond-Ramond) scalar superpartners. N = 2 space-time supersymmetry requires the low-energy effective mutual interaction of these excitations be described by a quaternionic σ-model in target space.
S. Ferrara, S. Sabharwal
openaire   +3 more sources

Symmetries on the moduli space of (2,2) superstring vacua

Nuclear Physics B, 1991
Abstract Symmetries of the space of (2,2) string vacua for c = 3, 6, 9 are discussed in the context of orbifoldized Landau-Ginzburg theories. A general method for finding the maximal symmetry groups on the moduli space of untwisted marginal operators is presented, by studying deformations of superpotentials.
Amit Giveon, Dirk-Jan Smith
openaire   +3 more sources

Critical superstring vacua from noncritical manifolds: A novel framework for string compactification and mirror symmetry [PDF]

Physical Review Letters, 1993
A new framework is found for the compactification of supersymmetric string theory. It is shown that the massless spectra of critical string vacua with central charge c=3${\mathit{D}}_{\mathrm{crit}}$ can be derived from manifolds of complex dimension ${\mathit{D}}_{\mathrm{crit}}$+2(Q-1),Q\ensuremath{\ge}1, whose first Chern class is quantized in a ...
openaire   +5 more sources

Cosmological Implications of Domain Walls due to Duality Invariant Moduli Sector of Superstring Vacua [PDF]

Physics Letters B, 1992
We study cosmological implications of the duality ($PSL(2,{\bf Z})$) invariant potential for the compactification radius $T$, arising in a class of superstring vacua.
Albrecht, Binetruy, Candelas, Cardoso, Casas, Cvetič, Cvetič, Cvetič, Cvetič, Derendinger, Derendinger, Dine, Dine, Dine, Dine, Dixon, Dixon, Everett, Ferrara, Ferrara, Font, Freese, Giveon, Greene, Guth, Kaplunovsky, Kaplunovsky, Kibble, Kibble, Kibble, Kim, Kim, Krasnikov, Lazarides, Lehner, Linde, Louis, Lüst, M. Cvetič, Nilles, Ovrut, Ovrut, R.L. Davis, Rey, Rey, Schoeneberg, Sikivie, Vilenkin, Vilenkin, Vilenkin, Wise   +50 more
core   +2 more sources

Weakly coupled de Sitter vacua with fluxes and the swampland

Journal of High Energy Physics, 2019
It was recently argued that the swampland distance conjecture rules out dS vacua at parametrically large field distances. We point out that this conclusion can in principle be avoided in the presence of large fluxes that are not bounded by a tadpole ...
Daniel Junghans
doaj   +3 more sources

Heterotic superstring vacua in four dimensions based on non-compact affine current algebras

Nuclear Physics B, 1990
Abstract New classes of unitary conformal and superconformal theories based on cosets of affine non-compact current algebras are suggested. Unitarity restrictions and the structure of the modules labelled by the primary states are discussed in general terms as well as in detail for SU (1,1)/ U (1), SU (N,M)/ SU (N) × SU (M) × U (1)
openaire   +3 more sources

Systematic study of the SO(10) symmetry breaking vacua in the matrix model for type IIB superstrings [PDF]

Journal of High Energy Physics, 2011
We study the properties of the space-time that emerges dynamically from the matrix model for type IIB superstrings in ten dimensions. We calculate the free energy and the extent of space-time using the Gaussian expansion method up to the third order ...
DN Kabat, DN Kabat, DN Kabat, F Sugino, Fumihiko Sugino, GW Moore, H Aoki, H Kawai, H Kawai, H Steinacker, J Ambjørn, J Ambjørn, J Ambjørn, J Nishimura, J Nishimura, J Nishimura, J Nishimura, J Nishimura, J Nishimura, J Nishimura, Jun Nishimura, K Anagnostopoulos, KN Anagnostopoulos, KN Anagnostopoulos, MB Green, N Iizuka, N Ishibashi, P Austing, P Austing, PM Stevenson, R Dijkgraaf, S Oda, T Aoyama, T Aoyama, T Aoyama, T Aoyama, T Banks, T Hotta, Toshiyuki Okubo, W Krauth, Z Burda   +40 more
core   +2 more sources

A search for exact superstring vacua [PDF]

Il Nuovo Cimento A, 1994
We investigate $2d$ sigma-models with a $2+N$ dimensional Minkowski signature target space metric and Killing symmetry, specifically supersymmetrized, and see under which conditions they might lead to corresponding exact string vacua. It appears that the issue relies heavily on the properties of the vector $M_ $, a reparametrization term, which needs ...
Petermann, A., Zichichi, A.
openaire   +2 more sources

Flux Vacua and Branes of the Minimal Superstring [PDF]

Journal of High Energy Physics, 2005
We analyze exactly the simplest minimal superstring theory, using its dual matrix model. Its target space is one dimensional (the Liouville direction), and the background fields include a linear dilaton, a possible tachyon condensate, and RR flux. The theory has both charged and neutral branes, and these exhibit new and surprising phenomena. The smooth
Seiberg, Nathan, Shih, David
openaire   +2 more sources

Gauge supergravity in D = 2 + 2

Journal of High Energy Physics, 2017
We present an action for chiral N = (1, 0) supergravity in 2 + 2 dimensions. The fields of the theory are organized into an OSp(1|4) connection supermatrix, and are given by the usual vierbein V a , spin connection ω ab , and Majorana gravitino ψ.
Leonardo Castellani
doaj   +1 more source