Results 61 to 70 of about 1,349,598 (293)

Structure of loop space at finite N

Journal of High Energy Physics
The space of invariants for a single matrix is generated by traces containing at most N matrices per trace. We extend this analysis to multi-matrix models at finite N. Using the Molien-Weyl formula, we compute partition functions for various multi-matrix
Robert de Mello Koch, Antal Jevicki
doaj   +1 more source

A finite loop space not rationally equivalent to a compact Lie group

, 2003
We construct a connected finite loop space of rank 66 and dimension 1254 whose rational cohomology is not isomorphic as a graded vector space to the rational cohomology of any compact Lie group, hence providing a counterexample to a classical conjecture.
Aguadé, Browder, Clark, Dwyer, Dwyer, Erik Kjaer Pedersen, Ewing, Hilton, Hubbuck, Jesper Grodal, Kasper K. S. Andersen, Kumpel, Kumpel, Lin, Lin, Lin, Møller, Notbohm, Notbohm, Ochiai, Shephard, Smith, Stasheff, Sugawara, Tilman Bauer, Wilkerson, Wilkerson, Zabrodsky   +27 more
core   +2 more sources

Non-commutative flux representation for loop quantum gravity [PDF]

, 2011
The Hilbert space of loop quantum gravity is usually described in terms of cylindrical functionals of the gauge connection, the electric fluxes acting as non-commuting derivation operators. It has long been believed that this non-commutativity prevents a
A Baratin, Ashtekar A, Ashtekar A Lewandowski J, B Dittrich, Baratin A, Baratin A, Barrett J W, Bobienski M Lewandowski J Mroczek M, Bojowald M, Bonzom V, D Oriti, Dittrich B, Freidel L, Freidel L, Giesel K Tambornino J Thiemann T, J Tambornino, Livine E R, Livine E R, Livine E R, Oriti D, Oriti D, Oriti D, Oriti D Oriti D, Perez A, Speziale S, Thiemann T   +25 more
core   +4 more sources

Gut microbiome and aging—A dynamic interplay of microbes, metabolites, and the immune system

FEBS Letters, EarlyView.
Age‐dependent shifts in microbial communities engender shifts in microbial metabolite profiles. These in turn drive shifts in barrier surface permeability of the gut and brain and induce immune activation. When paired with preexisting age‐related chronic inflammation this increases the risk of neuroinflammation and neurodegenerative diseases.
Aaron Mehl, Eran Blacher
wiley   +1 more source

Positive and negative ladders in loop space

Journal of High Energy Physics
Motivated by a new term-wise factorised formula for the two-loop MHV integrand for scattering amplitudes in N $$ \mathcal{N} $$ = 4 super Yang-Mills (SYM), together with recent results for the five-point negative ladders in loop space, we present the ...
Ross Glew, Tomasz Łukowski
doaj   +1 more source

Fault Detection for Closed-Loop Control Systems Based on Parity Space Transformation

IEEE Access, 2019
Fault detection for closed-loop control systems is the future development in the field of the fault diagnosis. Since a closed-loop control system is generally very robust to the external disturbances, fault detection has been challenging a hot research ...
Bowen Sun, Jiongqi Wang, Zhangming He, Yongrui Qin, Dayi Wang, Haiyin Zhou   +5 more
doaj   +1 more source

One-loop Partition Functions of 3D Gravity [PDF]

, 2008
We consider the one-loop partition function of free quantum field theory in locally Anti-de Sitter space-times. In three dimensions, the one loop determinants for scalar, gauge and graviton excitations are computed explicitly using heat kernel techniques.
Giombi, Simone, Maloney, Alexander, Yin, Xi   +2 more
core   +2 more sources

Loops in Anti–de Sitter Space [PDF]

Physical Review Letters, 2018
6 ...
Bertan, Igor, Sachs, Ivo
openaire   +4 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Causal loop quantum cosmology in momentum space

, 2008
We shall show that it is possible to make a causal interpretation of loop quantum cosmology using the momentum as the dynamical variable. We shall show that one can derive Bohmian trajectories.
ALI SHOJAI, de Broglie, FATIMAH SHOJAI, Golshani M., Shojai F.   +4 more
core   +1 more source