Zobrazeno 1 - 10
of 245
pro vyhledávání: '"Zwiebach, Barton"'
Autor:
Sen, Ashoke, Zwiebach, Barton
As of today there exist consistent, gauge-invariant string field theories describing all string theories: bosonic open and closed strings, open superstrings, heterotic strings and type II strings. The construction of these theories require algebraic
Externí odkaz:
http://arxiv.org/abs/2405.19421
Autor:
Sen, Ashoke, Zwiebach, Barton
We use the factorization constraints of open-closed string field theory to determine the signs and normalizations of general string amplitudes with both open and closed string external states. The normalization of all amplitudes is controlled by the
Externí odkaz:
http://arxiv.org/abs/2405.03784
Starting with the two-derivative limit of $D=2$ string theory, we explore the space of T-duality invariant $\alpha'$ corrections, a space that contains a point representing the fully $\alpha'$-corrected classical string theory. Using a parametrizatio
Externí odkaz:
http://arxiv.org/abs/2308.09743
We report two surprising results on $\alpha'$ corrections in string theory restricted to massless fields. First, for critical dimension Bianchi type I cosmologies with $q$ scale factors only $q-1$ of them have non-trivial $\alpha'$ corrections. In pa
Externí odkaz:
http://arxiv.org/abs/2304.06763
Publikováno v:
JHEP01(2022)167
We consider a nonlocal scalar field theory inspired by the tachyon action in open string field theory. The Lorentz-covariant action is characterized by a parameter $\xi^2$ that quantifies the amount of nonlocality. Restricting to purely time-dependen
Externí odkaz:
http://arxiv.org/abs/2111.03672
Autor:
Costello, Kevin, Zwiebach, Barton
The string vertices of closed string field theory are subsets of the moduli spaces of punctured Riemann surfaces that satisfy a geometric version of the Batalin-Vilkovisky master equation. We present a homological proof of existence of string vertice
Externí odkaz:
http://arxiv.org/abs/1909.00033
Autor:
Hohm, Olaf, Zwiebach, Barton
Publikováno v:
Phys. Rev. D 100, 126011 (2019)
While the classification of $\alpha'$ corrections of string inspired effective theories remains an unsolved problem, we show how to classify duality invariant $\alpha'$ corrections for purely time-dependent (cosmological) backgrounds. We determine th
Externí odkaz:
http://arxiv.org/abs/1905.06963
Autor:
Hohm, Olaf, Zwiebach, Barton
The higher-derivative $\alpha'$ corrections consistent with $O(d,d)$ duality invariance can be completely classified for cosmological, purely time-dependent backgrounds. This result is used to show that there are duality invariant theories featuring
Externí odkaz:
http://arxiv.org/abs/1905.06583
Autor:
Naseer, Usman, Zwiebach, Barton
We apply recently developed convex programs to find the minimal-area Riemannian metric on $2n$-sided polygons ($n\geq 3$) with length conditions on curves joining opposite sides. We argue that the Riemannian extremal metric coincides with the conform
Externí odkaz:
http://arxiv.org/abs/1903.11755