Results 81 to 90 of about 9,369 (182)

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

Alleviating trade‐off between responsivity and response speed of Ga2O3 solar‐blind photodetector via modulation of carrier redistribution and extraction accessibility

InfoMat, Volume 7, Issue 9, September 2025.
Ga2O3 photodetectors, particularly those dominated by the photoconductive effect, inevitably face a trade‐off between photoresponsivity and response speed. In this work, bilayer‐structure Ga2O3 films are adopted for solar‐blind photodetectors to alleviate the trade‐off between photoresponsivity and response speed.
Xiaolan Ma, Ying Zhang, Pengju Tan, Xiao Feng, Yiran Hao, Guangwei Xu, Xiaolong Zhao, Nan Gao, Xiaohu Hou, Qin Hu, Shibing Long   +10 more
wiley   +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

String Theory Dynamics In Various Dimensions [PDF]

, 1995
The strong coupling dynamics of string theories in dimension $d\geq 4$ are studied. It is argued, among other things, that eleven-dimensional supergravity arises as a low energy limit of the ten-dimensional Type IIA superstring, and that a recently ...
Bars, Callan, Carr, Cremmer, Cremmer, Dabholkar, Dabholkar, Dai, Dine, Duff, Duff, Edward Witten, Gibbons, Ginsparg, Giveon, Hull, Huq, Julia, Kallosh, Nahm, Narain, Narain, Romans, Seiberg, Seiberg, Sen, Sen, Shenker, Strominger, Witten   +29 more
core   +3 more sources

Dark Dimension With (Little) Strings Attached

Fortschritte der Physik, Volume 73, Issue 4, April 2025.
Abstract A relation between dark energy and the scale of new physics in weakly coupled string theory is motivated. This mixing between infrared and ultraviolet physics leads to a unique corner for real‐world phenomenology: barring fine‐tunings, the authors are naturally led to the “dark dimension” scenario, a single mesoscopic extra dimension of micron
Ivano Basile, Dieter Lüst
wiley   +1 more source

The tadpole conjecture at large complex-structure

Journal of High Energy Physics, 2022
The tadpole conjecture by Bena, Blåbäck, Graña and Lüst effectively states that for string-theory compactifications with a large number of complex-structure moduli, not all of these moduli can be stabilized by fluxes.
Erik Plauschinn
doaj   +1 more source

Three Generations in Type I Compactifications [PDF]

, 1998
Generalizing the recent work on three-family Type I compactifications, we classify perturbative Type I vacua obtained via compactifying on the T^6/Z_2 X Z_2 X Z_3 orbifold with all possible Wilson lines. In particular, we concentrate on models with gauge
A. Dabholkar, A. Sagnotti, C. Angelantonj, C.G. Callan, C.G. Callan, D.C. Dunbar, E. Witten, E.G. Gimon, E.G. Gimon, G. Pradisi, G. Zwart, J. Dai, J. Lykken, J. Polchinski, J. Polchinski, J. Polchinski, M. Berkooz, M. Bianchi, M. Bianchi, N. Arkani-Hamed, N. Ishibashi, P. Hořava, P. Hořava, R.G. Leigh, S.-H. Henry Tye, S.M. Roy, S.M. Roy, Z. Bern, Z. Kakushadze, Z. Kakushadze, Z. Kakushadze, Z. Kakushadze, Zurab Kakushadze   +32 more
core   +3 more sources

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

Nothing really matters

Journal of High Energy Physics, 2020
We study non-perturbative instabilities of AdS spacetime in General Relativity with a cosmological constant in arbitrary dimensions. In this simple setup we explicitly construct a class of gravitational instantons generalizing Witten’s bubble of nothing.
Giuseppe Dibitetto, Nicolò Petri, Marjorie Schillo   +2 more
doaj   +1 more source

A Standard Model from the E8 x E8 Heterotic Superstring [PDF]

, 2005
In a previous paper, we introduced a heterotic standard model and discussed its basic properties. This vacuum has the spectrum of the MSSM with one additional pair of Higgs-Higgs conjugate fields and a small number of uncharged moduli. In this paper, the
Braun, Volker, He, Yang-Hui, Ovrut, Burt A., Pantev, Tony   +3 more
core   +3 more sources