Results 81 to 90 of about 6,660,767 (299)
Aligned Natural Inflation in String Theory [PDF]
, 2014 The authors discuss type IIB string theory realizations of Kim-Nilles-Peloso (KNP) multiple axion inflation, which provides a super-Planckian effective axion decay constant, necessary for UV stable realistic slow roll inflation.
Cody Long, L. McAllister, P. McGuirk
semanticscholar +1 more source
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 +4 more
wiley +1 more source
Superstring amplitudes, unitarily, and Hankel determinants of multiple zeta values
Journal of High Energy Physics, 2019 The interplay of unitarity and analyticity has long been known to impose strong constraints on scattering amplitudes in quantum field theory and string theory. This has been highlighted in recent times in a number of papers and lecture notes.
Michael B. Green, Congkao Wen
doaj +1 more source
The Regge limit of AdS3 holographic correlators
Journal of High Energy Physics, 2020 We study the Regge limit of 4-point AdS3 × S 3 correlators in the tree-level supergravity approximation and provide various explicit checks of the relation between the eikonal phase derived in the bulk picture and the anomalous dimensions of certain ...
Stefano Giusto +2 more
doaj +1 more source
Scattering Equations and String Theory Amplitudes [PDF]
, 2014 Scattering equations for tree-level amplitudes are viewed in the context of string theory. To this end we are led to define a new dual model whose amplitudes coincide with string theory in both the small and large ${\ensuremath{\alpha}}^{\ensuremath{'}}$
Emil BJERRUM-BOHR +3 more
semanticscholar +1 more source
INTERPOLATING STRING FIELD THEORIES [PDF]
Modern Physics Letters A, 1992 A minimal area problem imposing different length conditions on open and closed curves is shown to define a one-parameter family of covariant open-closed quantum string field theories. These interpolate from a recently proposed factorizable open-closed theory up to an extended version of Witten’s open string field theory capable of incorporating on ...
openaire +2 more sources
Advanced Functional Materials, EarlyView.A previously unreported coordination motif stabilising single Fe atoms by indigo chelation and pyridyl coordination on Au(111) has been revealed. By using planar tritopic pyridyl linkers (TPyB), extended 2D porous networks of indigo3(TPyB)2Fe6 form. These networks can be crystalline or vitreous and offer an environment where individual coordination ...
Hongxiang Xu +9 more
wiley +1 more source
Holographic RG flows and Janus solutions from matter-coupled $$N=4$$ N = 4 gauged supergravity
European Physical Journal C: Particles and Fields, 2021 We study an $$SO(2)\times SO(2)\times SO(2)\times SO(2)$$ S O ( 2 ) × S O ( 2 ) × S O ( 2 ) × S O ( 2 ) truncation of four-dimensional $$N=4$$ N = 4 gauged supergravity coupled to six vector multiplets with $$SO(4)\times SO(4)$$ S O ( 4 ) × S O ( 4 ...
Parinya Karndumri
doaj +1 more source
Planckian axions in string theory [PDF]
, 2014 A bstractWe argue that super-Planckian diameters of axion fundamental domains can arise in Calabi-Yau compactifications of string theory. In a theory with N axions θi, the fundamental domain is a polytope defined by the periodicities of the axions, via ...
Thomas C. Bachlechner +2 more
semanticscholar +1 more source
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 +5 more
wiley +1 more source