Results 91 to 100 of about 17,451 (173)

On the stability of string theory vacua

Journal of High Energy Physics, 2022
Vacuum compactifications may suffer from instabilities under small perturbations or tunnel effects; both are difficult to analyze. In this paper we consider the issue from a higher-dimensional perspective.
Suvendu Giri, Luca Martucci, Alessandro Tomasiello   +2 more
doaj   +1 more source

Band Tailoring Enabled Perovskite Devices for X‐Ray to Near‐Infrared Photodetection

Advanced Science, Volume 12, Issue 9, March 6, 2025.
Perovskite‐based photodetectors are improved for wide‐spectrum detection X‐rays to near‐infrared using a type‐II heterojunction with tellurium. This design reduces dark current noise and enhances sensitivity, with a scalable sensor array showing promise for imaging applications.
Yi‐Chu He, Guan‐Hua Dun, Jun Deng, Jia‐Li Peng, Ken Qin, Jia‐He Zhang, Xiang‐Shun Geng, Min‐Shu Zhang, Ze‐Shu Wang, Yan Xie, Zhao‐Qiang Bai, Dan Xie, He Tian, Yi Yang, Tian‐Ling Ren   +14 more
wiley   +1 more source

On Four Dimensional N=1 Type I Compactifications [PDF]

, 1998
We consider four dimensional N=1 supersymmetric Type I compactifications on toroidal orbifolds T^6/G. In particular, we focus on the Type I vacua which are perturbative from the orientifold viewpoint, that is, on the compactifications with well defined ...
Angelantonj, Angelantonj, Berkooz, Berkooz, Bern, Bianchi, Bianchi, Bianchi, Blum, Blum, Callan, Callan, Dabholkar, Dabholkar, Dabholkar, Dai, Dine, Dunbar, Ferrara, Gimon, Gimon, Gimon, Green, Green, Hooft, Hořava, Hořava, Ishibashi, Kakushadze, Kakushadze, Kakushadze, Leigh, Polchinski, Polchinski, Polchinski, Polchinski, Pradisi, Roy, Roy, Sagnotti, Sen, Sen, Sen, Vafa, Witten, Zurab Kakushadze   +45 more
core   +6 more sources

From Minkowski to de Sitter in multifield no-scale models

Journal of High Energy Physics, 2019
We show the uniqueness of superpotentials leading to Minkowski vacua of single-field no-scale supergravity models, and the construction of dS/AdS solutions using pairs of these single-field Minkowski superpotentials.
John Ellis, Balakrishnan Nagaraj, Dimitri V. Nanopoulos, Keith A. Olive, Sarunas Verner   +4 more
doaj   +1 more source

New de Sitter solutions of 10d type IIB supergravity

Journal of High Energy Physics, 2020
We find and study 17 new de Sitter solutions of ten-dimensional (10d) type IIB supergravity with intersecting D 5-branes and orientifold O 5-planes, as well as a new Minkowski one.
David Andriot, Paul Marconnet, Timm Wrase   +2 more
doaj   +1 more source

Systematics of type IIB moduli stabilisation with odd axions

Journal of High Energy Physics, 2022
Moduli stabilisation in superstring compactifications on Calabi-Yau orientifolds remains a key challenge in the search for realistic string vacua.
Michele Cicoli, Andreas Schachner, Pramod Shukla   +2 more
doaj   +1 more source

Notes on Characterizations of 2d Rational SCFTs: Algebraicity, Mirror Symmetry, and Complex Multiplication

Fortschritte der Physik, Volume 73, Issue 1-2, February 2025.
Abstract S. Gukov and C. Vafa proposed a characterization of rational N=(1,1)$N=(1,1)$ superconformal field theories (SCFTs) in 1+1$1+1$ dimensions with Ricci‐flat Kähler target spaces in terms of the Hodge structure of the target space, extending an earlier observation by G. Moore.
Abhiram Kidambi, Masaki Okada, Taizan Watari   +2 more
wiley   +1 more source

Moduli stabilization in type IIB orientifolds at h2,1 = 50

Journal of High Energy Physics, 2023
We study moduli stabilization in Calabi-Yau orientifold compactifications of type IIB string theory with O3- and O7-planes. We consider a Calabi-Yau three-fold with Hodge number h 2,1 = 50 and stabilize all axio-dilaton and complex-structure moduli by ...
Konstantinos Tsagkaris, Erik Plauschinn
doaj   +1 more source

T‐Symmetry in String Geometry Theory

Advances in High Energy Physics, Volume 2025, Issue 1, 2025.
String geometry theory is one of the candidates of nonperturbative formulation of string theory. In this paper, we have shown that dimensionally reduced string geometry theories have what we call T‐symmetry. In the case of the dimensional reduction in space‐like directions, the T‐symmetry transformation gives the T‐dual transformation between the Type ...
Matsuo Sato, Taiki Tohshima, Michele Arzano   +2 more
wiley   +1 more source

Bound States Of Strings And $p$-Branes [PDF]

, 1995
The recent discovery of an explicit conformal field theory description of Type II $p$-branes makes it possible to investigate the existence of bound states of such objects.
Alvarez-Gaumé, Callan, Coleman, Crenuner, Dai, Donagi, Duff, Edward Witten, Green, Horava, Horava, Hull, Leigh, Polchinski, Sagnotti, Sen, Strominger, Strominger, Townsend, Vafa, Witten, Witten, Witten   +22 more
core   +2 more sources