Results 81 to 90 of about 96,015 (345)

S-duality in string gas cosmology [PDF]

Physics Letters B, 2007
We consider a toy cosmological model in string theory involving the winding and momentum modes of (m,n) strings, i.e. bound states of m fundamental and n D-strings. The model is invariant under S-duality provided that m and n are interchanged. The dilaton is naturally stabilized due to S-duality invariance, which offers a new mechanism of moduli fixing
Arapoglu, Savas, Karakci, Ata, Kaya, Ali
openaire   +4 more sources

Biodegradable and Recyclable Luminescent Mixed‐Matrix‐Membranes, Hydrogels, and Cryogels based on Nanoscale Metal‐Organic Frameworks and Biopolymers

Advanced Functional Materials, EarlyView.
The study presents biodegradable and recyclable mixed‐matrix membranes (MMMs), hydrogels, and cryogels using luminescent nanoscale metal‐organic frameworks (nMOFs) and biopolymers. These bio‐nMOF‐MMMs combine europium‐based nMOFs as probes for the status of the materials with the biopolymers agar and gelatine and present alternatives to conventional ...
Moritz Maxeiner, Julian Burkhart, Kateryna Borysova, Chiara Mazzariol, Klaus Müller‐Buschbaum   +4 more
wiley   +1 more source

Stringy ER = EPR

Journal of High Energy Physics, 2022
The ER = EPR correspondence relates a superposition of entangled, disconnected spacetimes to a connected spacetime with an Einstein-Rosen bridge. We construct examples in which both sides may be described by weakly-coupled string theory.
Daniel Louis Jafferis, Elliot Schneider
doaj   +1 more source

Duality Symmetries and the Type II String Effective Action [PDF]

, 1995
We discuss the duality symmetries of Type II string effective actions in nine, ten and eleven dimensions. As a by-product we give a covariant action underlying the ten--dimensional Type IIB supergravity theory.
Aspinwall, Bergshoeff, Bergshoeff, Bergshoeff, Bergshoeff, Callan, Castellani, Dabholkar, Dabholkar, Dai, Dine, Duff, Duff, Duff, Duff, Duff, Duff, E. Bergshoeff, Giveon, Güven, Horowitz, Hull, Hull, Izquierdo, Maharana, Marcus, Schwarz, Schwarz, Sen, Sen, Strominger, Tanii, Townsend, Townsend, Townsend, Tseytlin, Witten   +36 more
core   +3 more sources

A Smart Bio‐Battery Facilitates Diabetic Bone Defect Repair Via Inducing Macrophage Reprogramming and Synergistically Modulating Bone Remodeling Coupling

Advanced Functional Materials, EarlyView.
This research presents a novel implantable bio‐battery, GF‐OsG, tailored for diabetic bone repair. GF‐OsG generates microcurrents in high‐glucose conditions to enhance vascularization, shift macrophages to the M2 phenotype, and regulate immune responses.
Nanning Lv, Haifu Sun, Wenxiang Tang, Yonggang Li, Zhonglai Qian, Lihui Hong, Chong Chen, Hongye Li, Jiaxiang Bai, Yusen Qiao, Mingming Liu   +10 more
wiley   +1 more source

The exceptional sigma model

Journal of High Energy Physics, 2018
We detail the construction of the exceptional sigma model, which describes a string propagating in the “extended spacetime” of exceptional field theory. This is to U-duality as the doubled sigma model is to T-duality. Symmetry specifies the Weylinvariant
Alex S. Arvanitakis, Chris D. A. Blair
doaj   +1 more source

Lectures on Heterotic-Type I Duality [PDF]

, 1997
We present a review of heterotic-type I string duality. In particular, we discuss the effective field theory of six- and four-dimensional compactifications with N>1 supersymmetries. We then describe various duality tests by comparing gauge couplings, N=2
Aldazabal, Antoniadis, Antoniadis, Antoniadis, Antoniadis, Antoniadis, Antoniadis, Antoniadis, Antoniadis, Bachas, Berkooz, Bershadsky, Bershadsky, Bianchi, Candelas, de Wit, Dixon, Gimon, Green, H. Partouche, Harvey, Horava, Horava, Hull, I. Antoniadis, Kachru, Kaplunovsky, Klemm, Morales, Polchinski, Polchinski, Polchinski, Sagnotti, Sagnotti, Seiberg, Serone, T.R. Taylor, Witten   +37 more
core   +2 more sources

Toughening β‐Ga2O3 via Mechanically Seeded Dislocations

Advanced Functional Materials, EarlyView.
β‐Ga2O3 is promising for next‐generation semiconductors but its brittleness limits flexible and high‐precision applications. Here, mechanically seeded dislocations introduced by surface deformation improved damage tolerance in (001) β‐Ga2O3. Nanoindentation and characterization show dislocations suppress cleavage cracks by enabling stable plastic ...
Zanlin Cheng, Jiawen Zhang, Peng Gao, Guosong Zeng, Xufei Fang, Wenjun Lu   +5 more
wiley   +1 more source

T-Duality in the Green-Schwarz Formalism, and the Massless/Massive IIA Duality Map [PDF]

, 1999
We derive a component-field expansion of the Green-Schwarz action for the type IIA string, in an arbitrary background of massless NS-NS and R-R bosonic fields, up to quadratic order in the fermionic coordinates \theta.
Achucarro, Alvarez, Bergshoeff, Bergshoeff, Bergshoeff, Brink, Buscher, C.N. Pope, Cowdall, Cremmer, Cremmer, de Wit, Duff, Giveon, Giveon, Grisaru, Grisaru, H. Lü, Hull, K.S. Stelle, Lavrinenko, Lavrinenko, M. Cvetič, Meessen, Romans, Tseytlin   +25 more
core   +4 more sources

Beyond Presumptions: Toward Mechanistic Clarity in Metal‐Free Carbon Catalysts for Electrochemical H2O2 Production via Data Science

Advanced Materials, EarlyView.
Metal‐free carbon catalysts enable the sustainable synthesis of hydrogen peroxide via two‐electron oxygen reduction; however, active site complexity continues to hinder reliable interpretation. This review critiques correlation‐based approaches and highlights the importance of orthogonal experimental designs, standardized catalyst passports ...
Dayu Zhu, Hsi‐wen Wu, Xiao Wang, Jie Zhang   +3 more
wiley   +1 more source