The Experts below are selected from a list of 148539 Experts worldwide ranked by ideXlab platform
Leonardo Patino - One of the best experts on this subject based on the ideXlab platform.
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chaos diffusivity and spreading of entanglement in magnetic branes and the strengthening of the Internal Interaction
Journal of High Energy Physics, 2018Co-Authors: Daniel Avila, Viktor Jahnke, Leonardo PatinoAbstract:We use holographic methods to study several chaotic properties of a super Yang-Mills theory at temperature T in the presence of a background magnetic field of constant strength B. The field theory we work on has a renormalization flow between a fixed point in the ultraviolet and another in the infrared, occurring in such a way that the energy at which the crossover takes place is a monotonically increasing function of the dimensionless ratio ℬ/T$^{2}$. By considering shock waves in the bulk of the dual gravitational theory, and varying ℬ/T$^{2}$, we study how several chaos-related properties of the system behave while the theory they live in follows the renormalization flow. In particular, we show that the entanglement and butterfly velocities generically increase in the infrared theory, violating the previously suggested upper bounds but never surpassing the speed of light. We also investigate the recent proposal relating the butterfly velocity with diffusion coefficients. We find that electric diffusion constants respect the lower bound proposed by Blake. All our results seem to consistently indicate that the global effect of the magnetic field is to strengthen the Internal Interaction of the system.
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chaos diffusivity and spreading of entanglement in magnetic branes and the strengthening of the Internal Interaction
arXiv: High Energy Physics - Theory, 2018Co-Authors: Daniel Avila, Viktor Jahnke, Leonardo PatinoAbstract:We use holographic methods to study several chaotic properties of a super Yang-Mills theory at temperature $T$ in the presence of a background magnetic field of constant strength $\mathcal{B}$. The field theory we work on has a renormalization flow between a fixed point in the ultraviolet and another in the infrared, occurring in such a way that the energy at which the crossover takes place is a monotonically increasing function of the dimensionless ratio $\mathcal{B}/T^2$. By considering shock waves in the bulk of the dual gravitational theory, and varying $\mathcal{B}/T^2$, we study how several chaos-related properties of the system behave while the theory they live in follows the renormalization flow. In particular, we show that the entanglement and butterfly velocities generically increase in the infrared theory, violating the previously suggested upper bounds but never surpassing the speed of light. We also investigate the recent proposal relating the butterfly velocity with diffusion coefficients. We find that electric diffusion constants respect the lower bound proposed by Blake. All our results seam to consistently indicate that the global effect of the magnetic field is to strengthen the Internal Interaction of the system.
Harrison, Richard J. - One of the best experts on this subject based on the ideXlab platform.
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Nanopaleomagnetism of meteoritic Fe-Ni studied using X-ray photoemission electron microscopy
Elsevier, 2015Co-Authors: Bryson, James F. J., Herrero-albillos Julia, Kronast Florian, Ghidini Massimo, Redfern, Simon A. T., Laan, Gerrit Van Der, Harrison, Richard J.Abstract:Under a Creative Commons license.X-ray photoemission electron microscopy (XPEEM) enables natural remanent magnetisation to be imaged with ~30nm resolution across a field of view of 5-20 μm. The method is applied to structural features typical of the Widmanstätten microstructure (kamacite - tetrataenite rim - cloudy zone - plessite) in the Tazewell IIICD iron meteorite. Kamacite lamellae and the tetrataenite rim are multidomain, whereas plessite consists of laths of different phases displaying a range of stable magnetisation directions. The cloudy zone (CZ) displays a complex interlocking domain pattern resulting from nanoscale islands of tetrataenite with easy axes distributed along three possible crystallographic directions. Quantitative analysis of the coarse and intermediate CZ was achieved using a combination of image simulations and histogram profile matching. Remanence information was extracted from individual regions of interest ~400nm wide, demonstrating for the first time the capability of XPEEM to perform quantitative paleomagnetic analysis at sub-micron length scales. The three tetrataenite easy axis orientations occur with equal probability in the coarse and intermediate CZ, suggesting that spinodal decomposition in these regions was not strongly influenced by Internal Interaction fields, and that they are suitable candidates for future paleomagnetic studies. The fine CZ shows a strong dominance of one easy axis. This effect is attributed to island-island exchange Interactions that render the fine CZ unsuitable for paleomagnetic study. Variations in the relative strength (proportion of dominant easy axis) and direction (direction of dominant easy axis) of a paleomagnetic field can be resolved from different regions of the CZ using XPEEM, raising the prospect of obtaining a time-resolved measurement of the active dynamo period in meteorites originating from the upper unmelted regions of differentiated asteroids (e.g. chondrites, pallasites, mesosiderites). © 2014.Open Access funded by Natural Environment Research Council.Peer Reviewe
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Nanopaleomagnetism of meteoritic Fe–Ni studied using X-ray photoemission electron microscopy
Published by Elsevier B.V., 2014Co-Authors: Bryson, James F.j., Herrero-albillos Julia, Kronast Florian, Ghidini Massimo, Redfern, Simon A.t., Van Der Laan Gerrit, Harrison, Richard J.Abstract:AbstractX-ray photoemission electron microscopy (XPEEM) enables natural remanent magnetisation to be imaged with ∼30 nm resolution across a field of view of 5–20 μm. The method is applied to structural features typical of the Widmanstätten microstructure (kamacite – tetrataenite rim – cloudy zone – plessite) in the Tazewell IIICD iron meteorite. Kamacite lamellae and the tetrataenite rim are multidomain, whereas plessite consists of laths of different phases displaying a range of stable magnetisation directions. The cloudy zone (CZ) displays a complex interlocking domain pattern resulting from nanoscale islands of tetrataenite with easy axes distributed along three possible crystallographic directions. Quantitative analysis of the coarse and intermediate CZ was achieved using a combination of image simulations and histogram profile matching. Remanence information was extracted from individual regions of interest ∼400 nm wide, demonstrating for the first time the capability of XPEEM to perform quantitative paleomagnetic analysis at sub-micron length scales. The three tetrataenite easy axis orientations occur with equal probability in the coarse and intermediate CZ, suggesting that spinodal decomposition in these regions was not strongly influenced by Internal Interaction fields, and that they are suitable candidates for future paleomagnetic studies. The fine CZ shows a strong dominance of one easy axis. This effect is attributed to island–island exchange Interactions that render the fine CZ unsuitable for paleomagnetic study. Variations in the relative strength (proportion of dominant easy axis) and direction (direction of dominant easy axis) of a paleomagnetic field can be resolved from different regions of the CZ using XPEEM, raising the prospect of obtaining a time-resolved measurement of the active dynamo period in meteorites originating from the upper unmelted regions of differentiated asteroids (e.g. chondrites, pallasites, mesosiderites)
Yong Chen - One of the best experts on this subject based on the ideXlab platform.
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the Internal Interaction in rbbp5 regulates assembly and activity of mll1 methyltransferase complex
Nucleic Acids Research, 2019Co-Authors: J L Han, Xiaoman Wang, Chao Peng, Yong ChenAbstract:The Mixed Lineage Leukemia protein 1 (MLL1) plays an essential role in the maintenance of the histone H3 lysine 4 (H3K4) methylation status for gene expression during differentiation and development. The methyltransferase activity of MLL1 is regulated by three conserved core subunits, WDR5, RBBP5 and ASH2L. Here, we determined the structure of human RBBP5 and demonstrated its role in the assembly and regulation of the MLL1 complex. We identified an Internal Interaction between the WD40 propeller and the C-terminal distal region in RBBP5, which assisted the maintenance of the compact conformation of the MLL1 complex. We also discovered a vertebrate-specific motif in the C-terminal distal region of RBBP5 that contributed to nucleosome recognition and methylation of nucleosomes by the MLL1 complex. Our results provide new insights into functional conservation and evolutionary plasticity of the scaffold protein RBBP5 in the regulation of KMT2-family methyltransferase complexes.
Daniel Avila - One of the best experts on this subject based on the ideXlab platform.
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chaos diffusivity and spreading of entanglement in magnetic branes and the strengthening of the Internal Interaction
Journal of High Energy Physics, 2018Co-Authors: Daniel Avila, Viktor Jahnke, Leonardo PatinoAbstract:We use holographic methods to study several chaotic properties of a super Yang-Mills theory at temperature T in the presence of a background magnetic field of constant strength B. The field theory we work on has a renormalization flow between a fixed point in the ultraviolet and another in the infrared, occurring in such a way that the energy at which the crossover takes place is a monotonically increasing function of the dimensionless ratio ℬ/T$^{2}$. By considering shock waves in the bulk of the dual gravitational theory, and varying ℬ/T$^{2}$, we study how several chaos-related properties of the system behave while the theory they live in follows the renormalization flow. In particular, we show that the entanglement and butterfly velocities generically increase in the infrared theory, violating the previously suggested upper bounds but never surpassing the speed of light. We also investigate the recent proposal relating the butterfly velocity with diffusion coefficients. We find that electric diffusion constants respect the lower bound proposed by Blake. All our results seem to consistently indicate that the global effect of the magnetic field is to strengthen the Internal Interaction of the system.
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chaos diffusivity and spreading of entanglement in magnetic branes and the strengthening of the Internal Interaction
arXiv: High Energy Physics - Theory, 2018Co-Authors: Daniel Avila, Viktor Jahnke, Leonardo PatinoAbstract:We use holographic methods to study several chaotic properties of a super Yang-Mills theory at temperature $T$ in the presence of a background magnetic field of constant strength $\mathcal{B}$. The field theory we work on has a renormalization flow between a fixed point in the ultraviolet and another in the infrared, occurring in such a way that the energy at which the crossover takes place is a monotonically increasing function of the dimensionless ratio $\mathcal{B}/T^2$. By considering shock waves in the bulk of the dual gravitational theory, and varying $\mathcal{B}/T^2$, we study how several chaos-related properties of the system behave while the theory they live in follows the renormalization flow. In particular, we show that the entanglement and butterfly velocities generically increase in the infrared theory, violating the previously suggested upper bounds but never surpassing the speed of light. We also investigate the recent proposal relating the butterfly velocity with diffusion coefficients. We find that electric diffusion constants respect the lower bound proposed by Blake. All our results seam to consistently indicate that the global effect of the magnetic field is to strengthen the Internal Interaction of the system.
Bidyut K Paul - One of the best experts on this subject based on the ideXlab platform.
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structure dynamics and transport properties of microemulsions
Advances in Colloid and Interface Science, 1998Co-Authors: Satya P Moulik, Bidyut K PaulAbstract:Abstract The structure, dynamics and transport behaviors of microemulsions are physicochemically unique and need exploration for basic understanding of their formation, state of aggregation, Internal Interaction, and stability with reference to their probable uses. In this review, the structural characteristics of microemulsions and their dynamic and transport behaviors have been presented in detail. The underlying principles of the methodologies used for the above understanding have been concisely documented and discussed. An attempt has been made to maintain minimum overlapping of the contents of one section with another. As far as practicable, an effort has been made to include relevant references of the past and present works. Our apology to those authors whose works have escaped our notice.