2,166 research outputs found
Holographic Thermal Helicity
We study the thermal helicity, defined in arXiv:1211.3850, of a conformal
field theory with anomalies in the context of AdS/CFT. To do
so, we consider large charged rotating AdS black holes in the
Einstein-Maxwell-Chern-Simons theory with a negative cosmological constant
using fluid/gravity expansion. We compute the anomaly-induced current and
stress tensor of the dual CFT in leading order of the fluid/gravity derivative
expansion and show their agreement with the field theoretical replacement rule
for the thermal helicity. Such replacement rule is reflected in the bulk by new
replacement rules obeyed by the Hall currents around the black hole.Comment: 20 pages + 47 pages of appendices ; v2: minor correction
Covariant Noether Charge for Higher Dimensional Chern-Simons Terms
We construct a manifestly covariant differential Noether charge for theories
with Chern-Simons terms in higher dimensional spacetimes. This is in contrast
to Tachikawa's extension of the standard Lee-Iyer-Wald formalism which results
in a non-covariant differential Noether charge for Chern-Simons terms. On a
bifurcation surface, our differential Noether charge integrates to the
Wald-like entropy formula proposed by Tachikawa in arXiv:hep-th/0611141.Comment: 45 pages; v2: minor corrections and JHEP versio
Crystal structure of (4,4âČ-bipyridyl-ÎșN)bis[N-(2-hydroxyethyl)-N-isopropyldithiocarbamato-Îș2 S,SâČ]zinc(II)â4,4âČ-bipyridyl (2/1) and its isostructural cadmium(II) analogue
The title structures, [M(C6H12NOS2)2(C10H8N2)]·0.5C10H8N2, for M = Zn, (I), and Cd, (II), feature terminally bound 4,4âČ-bipyridyl ligands and non-coordinating 4,4âČ-biÂpyridyl molÂecules, with the latter disposed about a centre of inversion. The coordination geometry about the metal atom is defined by two non-symmetrically chelating diÂthioÂcarbamate ligands and a pyridyl N atom. The NS4 donor sets are distorted but, approximate to trigonal bipyramidal in each case. In the crystal, hyÂdroxy-OâH...O(hyÂdroxy) and hyÂdroxy-OâH...N(pyridÂyl) hydrogen bonds between the zinc-containing molÂecules lead to a supraÂmolecular layer parallel to (100). The three-dimensional architecture arises as the layers are linked via methine-CâH...S, pyridyl-CâH...O(hyÂdroxy) and ÏâÏ [inter-centroid distance between coordinated pyridyl rings = 3.6246â
(18)â
Ă
] interÂactions. Channels along the c-axis direction are occupied by the non-coordinating 4,4âČ-bipyridine molÂecules, which are held in place by CâH...Ï(chelate ring) contacts
Crystal structure of bis(ÎŒ-N-i-propyl-N-n-propyldithiocarbamato-Îș3S,SâČ:S)bis(N-i-propyl-N-n-propyldithiocarbamato-Îș2S,SâČ)dicadmium(II), C28H56Cd2N4S8
C28H56Cd2N4S8, monoclinic, P21/n (no. 14), a=9.9003(3) Ă
,
b=11.7373(3) Ă
, c=17.4539(5) Ă
, ÎČ=102.999(3)°,
V =1976.22(10) Ă
3, Z =2, Rgt(F)=0.0243, wRref(F2)=0.0582,
T =100 K
Crystal structure of bis(ÎŒ-N-i-propyl-N-n-propyldithiocarbamato-Îș2S:SâČ) bis(N-i-propyl-N-n-propyldithiocarbamato-Îș2S,SâČ)dizinc(II), C28H56N4S8Zn2
C28H56N4S8Zn2, monoclinic, P21/n (no. 14), a=9.4123(2) Ă
, b=19.2708(4) Ă
, c=11.5228(3) Ă
, ÎČ=107.202(2)°, V= 1996.54(8) Ă
3, Z=2, Rgt(F)=0.0254, wRref(F2)=0.0572, T=100(2)
Crystal structure of [ÎŒ2-1,1âČ-bis(diphenylphosphanyl)ferrocene-Îș2P:PâČ]bis[(pyrrolidine-1-carbodithioato-ÎșS)gold(I)]
The asymmetric unit of the title compound, {(C34H28FeP2)[Au(C5H8NS2)]2}, comprises half a molecule, with the full molecule being generated by the application of a centre of inversion. The independent AuI atom is coordinated by thiolate S and phosphane P atoms that define an approximate linear geometry [SâAuâP = 169.35â
(3)°]. The deviation from the ideal linear is traced to the close approach of the (intramolecular) non-coordinating thione S atom [Au...S = 3.1538â
(8)â
Ă
]. Supramolecular layers parallel to (100) feature in the crystal packing, being sustained by phenylâthione CâH...S interactions, with the non-coordinating thione S atom in the role of a dual acceptor. Layers stack with no specific interactions between them
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