Bis(isocyanato-κN)bis­(1,10-phenanthroline-κ2 N,N′)cobalt(II)

In the title complex, [Co(NCO)2(C12H8N2)2], the CoII atom, lying on a twofold rotation axis, is coordinated in a distorted octa­hedral environment by four N atoms from two chelating phenanthroline ligands and two N atoms from two isocyanate ligands in cis positions

U(1) × U(1) symmetry-protected topological order in Gutzwiller wave functions

Gutzwiller projection is a way to construct many-body wave functions that could carry topological order or symmetry-protected topological (SPT) order. However, an important issue is to determine whether or not a given Gutzwiller-projected wave function (GWF) carries a nontrivial SPT order, and which SPT order is carried by the wave function. In this paper, we numerically study the SPT order in a spin S = 1 GWF on the kagome lattice. Using the standard Monte Carlo method, we directly confirm that the GWF has (1) gapped bulk with short-range correlations, (2) a trivial topological order via a nondegenerate ground state, and zero topological entanglement entropy, (3) a nontrivial U(1) × U(1) SPT order via the Hall conductances of the protecting U(1) × U(1) symmetry, and (4) a symmetry-protected gapless boundary. This represents numerical evidence of continuous symmetry-protected topological order in two-dimensional bosonic lattice systems.Perimeter Institute for Theoretical PhysicsNational Science Foundation (U.S.) (Grant DMR-1005541)National Natural Science Foundation (China) (Grant 11274192)Templeton Foundation (Grant 39901

Properties of charge transport in a novel holographic quantum phase transition model

We study the properties of charge transport in a novel holographic QPT (quantum phase transition) model, which has two different metallic phases: the normal metallic phase and the novel metallic one. We numerically work out the scaling behaviors of DC (direct current) resistivity at low temperatures in both different metallic phases. The numerical results are solidly in agreement with the analytical ones determined by the near horizon geometry. Then, we mainly explore the properties of the low-frequency AC (alternating current) conductivity. A remarkable characteristic is that the normal metallic phase is a coherent system with vanishing intrinsic conductivity $\sigma_Q$, which is independent of the strength of the momentum dissipation. This result is in contrast with the common belief that with the strength of the momentum dissipation increasing, the system changes from a coherent phase to an incoherent one. But the novel metallic phase is an incoherent system with non-vanishing $\sigma_Q$. Away from the QCP (quantum critical point), $\sigma_Q$ increases, which indicates that the incoherent behavior becomes stronger.Comment: 16 pages, 5 figure

Peculiar properties in quasi-normal spectra from loop quantum gravity effect

We investigate the quasi-normal mode (QNM) spectra for scalar and electromagnetic fields over a covairant loop quantum gravity black hole (LQG-BH). For the fundamental modes, the LQG effect reduces the oscillations in the scalar field, however it induces stronger oscillations in the electromagnetic field, comparing to the classical case. Under the scalar field perturbation, the system enjoys faster decaying modes with more oscillations than the electromagnetic field. Some peculiar phenomena emerge in the scalar field's QNM spectra with high overtones for the angular quantum numbers $l>0$. It is that the LQG-BH has a larger real part of QNM with high overtones than the Schwarzschild black hole (SS-BH). Such an anomalous phenomenon results in the oscillation of the scalar field in the LQG-BH to be nearly identical to that in the SS-BH. Therefore, the high overtone modes of the scalar field in LQG-BH play an important role in the modes with $l>0$. This anomalous phenomenon, however, does not occur in the electromagnetic field's QNM spectra.Comment: 28 pages,10 figure

连续性血浆滤过吸附治疗重度百草枯中毒致多脏器功能衰竭患者的护理

Objective: To explore continuous plasma adsorption filtration in treatment with multiple organ failure in severe paraquat poisoning patients and its nursing care. Methods: 52 cases of severe paraquat poisoning were collected from December2009 to May 2009 in poisoning rescue center of affiliated hospital of logistics institute of armed police forces. They were treated with continuous plasma adsorption filtration. Summarize the experience of treatment and nursing. Results: Plasma adsorption treatment of 38 times tace, continuity of static - static hemofiltration treatment of 56 times, continuity of plasma filtration adsorption treatment 64 times, the rescue success rate of 57.96%. Conclusion: Continuity of plasma filtration adsorption treatment 64 times, can effectively improve the rescue success rate of patients with paraquat.目的  探讨对重度百草枯中毒多脏器功能衰竭患者行连续性血浆吸附滤过治疗的护理方法。方法  对本院中毒急救中心2009年12月—2013年5月期间收治的52例重度百草枯中毒患者进行连续性血浆滤过吸附治疗（CPFA）,总结分析治疗、护理的经验。结果  共进行血浆吸附治疗38次，连续性静-静脉血液滤过治疗56次，连续性血浆滤过吸附治疗64次，抢救成功率57.96%。结论  连续性血浆滤过吸附治疗可以有效的提高百草枯中毒患者的抢救成功率