Results 61 to 70 of about 11,016 (263)
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
Modular forms and SL(2, ℤ)-covariance of type IIB superstring theory
Journal of High Energy Physics, 2019 The local higher-derivative interactions that enter into the low-energy expansion of the effective action of type IIB superstring theory with constant complex modulus generally violate the U(1) R-symmetry of IIB supergravity by q U units.
Michael B. Green, Congkao Wen
doaj +1 more source
Collective physics in the closed bosonic string [PDF]
Physical Review D, 1990 A second-quantized analysis is performed to examine many-body phenomena in closed bosonic strings. The covariant nonpolynomial closed-string field theory is developed in terms of particle fields and shown to contain interactions triggering a nonperturbative condensation of the tachyon field.
, Kosteleck, , Samuel
openaire +2 more sources
Nanothermometry in Living Cells: Physical Limits, Conceptual and Material Challenges
Advanced Functional Materials, EarlyView.Heat and temperature are fundamental to life. When nanothermometers began probing regions as small as a living cell, they triggered controversial claims of large intracellular temperature gradients. We review physical constraints energy‐conservation, entropy production, thermodynamic fluctuations, and molecular dynamics.
Taras Plakhotnik
wiley +1 more source
Exotic branes in Exceptional Field Theory: E 7(7) and beyond
Journal of High Energy Physics, 2018 In recent years, it has been widely argued that the duality transformations of string and M-theory naturally imply the existence of so-called ‘exotic branes’ — low codimension objects with highly non-perturbative tensions, scaling as g s α for α ≤ −3. We
David S. Berman +2 more
doaj +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
Artificial Intelligence as the Next Visionary in Liquid Crystal Research
Advanced Functional Materials, EarlyView.The functions of AI in the research laboratory are becoming increasingly sophisticated, allowing the entire process of hypothesis formulation, material design, synthesis, experimental design, and reiterative testing to be automated. In our work, we conceive how the incorporation of AI in the laboratory environment will transform the role and ...
Mert O. Astam +2 more
wiley +1 more source
The Kerr-Schild double copy in curved spacetime
Journal of High Energy Physics, 2017 The double copy is a much-studied relationship between scattering amplitudes in gauge and gravity theories, that has subsequently been extended to classical field solutions.
Nadia Bahjat-Abbas +2 more
doaj +1 more source
New supersymmetric $$AdS_5$$ A d S 5 black strings from 5D $$N=4$$ N = 4 gauged supergravity
European Physical Journal C: Particles and Fields, 2023 We find a large class of new supersymmetric $$AdS_5$$ A d S 5 black strings from five-dimensional $$N=4$$ N = 4 gauged supergravity coupled to five vector multiplets with $$SO(2)_D\times SO(3)\times SO(3)$$ S O ( 2 ) D × S O ( 3 ) × S O ( 3 ) gauge group.
Parinya Karndumri
doaj +1 more source
Lorentz violation, two-time physics, and strings [PDF]
Physics Letters A, 2011 We study a recently proposed generalization of the relativistic particle by Kosteleck , that includes explicit Lorentz violation. We present an alternative action for this system and we show that this action can be interpreted as a particle in curved space with a metric that depends on the Lagrange multipliers.
Romero, Juan M. +2 more
openaire +3 more sources