Downward shift of infrared conductivity spectral weight at the DDW transition: role of anisotropy

We consider the motion of conductivity spectral weight at a finite-temperature phase transition at which $d_{x^2-y^2}$ density-wave (DDW) order develops. We show that there is a shift of spectral weight to higher frequencies if the quasiparticle lifetime is assumed to be isotropic, but a shift to lower frequencies if the quasiparticle lifetime is assumed to be anisotropic. We suggest that this is consistent with recent experiments on the pseudogap phase of the cuprate superconductors and, therefore, conclude that the observation of a downward shift in the spectral weight at the pseudogap temperature does not militate against the DDW theory of the pseudogap.Comment: 8 pages, 7 figures. Added reference

Quantum Computation Using Vortices and Majorana Zero Modes of a pxp_x + ipyip_y Superfluid of Fermionic Cold Atoms

We propose to use the recently predicted two-dimensional `weak-pairing' $p_x + ip_y$ superfluid state of fermionic cold atoms as a platform for topological quantum computation. In the core of a vortex, this state supports a zero-energy Majorana mode, which moves to finite energy in the corresponding topologically trivial `strong-pairing' state. By braiding vortices in the `weak-pairing' state, unitary quantum gates can be applied to the Hilbert space of Majorana zero-modes. For read-out of the topological qubits, we propose realistic schemes suitable for atomic superfluids

Xiap Inhibitor and Antiestrogen Embelin Abrogates Metastasis and Augments Apoptosis in Estrogen Receptor Positive Human Breast Adenocarcinoma Cell Line MCF-7

Tamoxifen therapy for the treatment of hormone responsive breast cancer has limitations due to acquired resistance in the case of recurrences. Embelin, a known inhibitor of X-linked inhibitor of apoptosis protein (XIAP) was also reported to exhibit strong antiestrogenic effects in animal models. Dual role of embelin as a proapoptotic and antiestrogenic agent may have potential benefits in the therapy of breast cancer. In this study, the effects of embelin treatment on estrogen receptor positive Human breast adenocarcinoma (MCF-7) cells was investigated to primarily understand if embelin being an antiestrogen and XIAP inhibitor could be a potential alternative to tamoxifen therapy. Results revealed that, embelin at a concentration of 65 μg/ml attenuated proliferation, inhibited metastatic migration, modulated the expression of Bcl2, Caspases and induced apoptosis in MCF-7 cells which was found to be p53 mediated. Hence, chemotherapy with embelin could be a promising strategy to be experimented in hormone responsive breast cancers

Elaeocarpus ganitrus: its beneficial antiparkinsonian effect in MPTP induced motor and non-motor impairments in mice

Elaeocarpus ganitrus (Family: Elaeocarpaceae), has shown beneficial role in the treatment of depression, convulsions and asthma. This study was undertaken to evaluate the antiparkinson effect of E.ganitrus. Materials and methods: Swiss albino mice of either sex were divided into 06 groups (n =12). 1st group mice were given 0.5% carboxy methyl cellulose (orally), 2nd group were administered MPTP (2 doses, each dose 20 mg/kg at 2 hr. interval, i.p.). Whereas 3rd, 4th and 5th groups - were administered with E. ganitrus (100, 200, and 400 mg/kg/day, orally), respectively, along with MPTP. Group 6- received Levodopa (30mg/kg, i.p,) along with MPTP. To evaluate anti-Parkinson effect, hanging wire test, tardive dyskinesia test and elevated plus maze test were performed on the1st day and on 8th day. One way ANOVA followed by post-hoc Tukey test, with p less than 0.05 was considered statistical significant. Results: E.ganitrus (200 and 400 mg/kg, p.o.) was found to increase the hanging time significantly (p less than 0.001) in hanging wire test and significantly decreased (p less than 0.001) the Vacuous Chewing Movements (VCMs) in tardive dyskinesia test as compared to MPTP group. E.ganitrus (200 and 400 mg/kg, p.o.) was found to significantly increase (p less than 0.001) the no. of entries and time spent in open arm and significantly decreased the no. of entries and time spent in closed arm (p less than 0.001) compared to MPTP treated group. Conclusion: The results of the present study conclusively showed that E.ganitrus has beneficial effect in MPTP induced experimental model of Parkinson's disease

Proposal to stabilize and detect half-quantum vortices in strontium ruthenate thin films: Non-Abelian braiding statistics of vortex matter in a px+ipy{p_x}+i{p_y} superconductor

We propose a simple way to stabilize half-quantum vortices in superconducting strontium ruthenate, assuming the order parameter is of chiral $p_x + ip_y$ symmetry, as is suggested by recent experiments. The method, first given by Salomaa and Volovik in the context of Helium-3, is very naturally suited for strontium ruthenate, which has a layered, quasi-two-dimensional, perovskite crystal structure. We propose possible experiments to detect their non abelian-braiding statistics. These experiments are of potential importance for topological quantum computation

Plant Disease Detection using Deep Learning in Banana and Sunflower

In recent years plant disease detection and classification is finding a lot of scope in the field of agriculture. The use of image pre-processing along with deep learning techniques is making the role of farmers easy in the process of plant leaf disease detection. In this paper we propose a deep learning technique, ResNet-50 for the identification and classification of leaf diseases mainly in banana and sunflower. Images for the training and testing purpose are collected by visiting the farms and from village dataset for normal, leaf spot, leaf blight, powdery mildew, bunchy top, sigatoka, panama wilt. Pre-processing is done to remove eliminate the noise in the image by converting the RGB input to HSV image. Binary pictures are retrieved to separate the diseased and unaffected portions based on the hue and saturation components. A clustering method is utilized to separate the diseased region from the normal portion and the background. Classification of the disease is carried out using ResNet-50 algorithm. The experimental results obtained are compared with CNN, machine learning algorithms like SVM, KNN, DT and Ensemble algorithm like RF and XG booster. The proposed algorithm provided maximum efficiency compared to other algorithms

Exotic resonant level models in non-Abelian quantum Hall states coupled to quantum dots

In this paper we study the coupling between a quantum dot and the edge of a non-Abelian fractional quantum Hall state. We assume the dot is small enough that its level spacing is large compared to both the temperature and the coupling to the spatially proximate bulk non-Abelian fractional quantum Hall state. We focus on the physics of level degeneracy with electron number on the dot. The physics of such a resonant level is governed by a $k$-channel Kondo model when the quantum Hall state is a Read-Rezayi state at filling fraction $\nu=2+k/(k+2)$ or its particle-hole conjugate at $\nu=2+2/(k+2)$. The $k$-channel Kondo model is channel symmetric even without fine tuning any couplings in the former state; in the latter, it is generically channel asymmetric. The two limits exhibit non-Fermi liquid and Fermi liquid properties, respectively, and therefore may be distinguished. By exploiting the mapping between the resonant level model and the multichannel Kondo model, we discuss the thermodynamic and transport properties of the system. In the special case of $k=2$, our results provide a novel venue to distinguish between the Pfaffian and anti-Pfaffian states at filling fraction $\nu=5/2$. We present numerical estimates for realizing this scenario in experiment.Comment: 18 pages, 2 figures. Clarified final discussio

Effective and Feasible Photocatalytic Degradation of Janus Green B dye in Aqueous Media using PbS/CTAB Nanocomposites

In this Chapter, we demonstrated the synthesis of Lead sulphide by using low-cost chemical displacement method. We used thioacetamide for the source of sulphide ion and for the source metal salt; lead nitrate was used. The structural, morphological, metal percentage and optical properties of as synthesized nanoparticles are investigated by using X-ray diffraction (XRD), Uv-Visible spectra; Field emission gun Scanning electron microscopy (FEG-SEM) with EDS, Fourier transforms infrared spectroscopy (FTIR), High-resolution transmission electron microscopy (HR-TEM) and Photoluminescence spectroscopy (PL).The average particle size of the nanoparticles from the x-ray diffraction is about 20 nm and also field emission gun Scanning electron microscopy shows good morphology and exhibited clearly cubic shape. Further, the photocatalytic degradation of Janus green B dye was measured by visible absorption spectroscopy. To obtain the optimal conditions for the dye degradation, the effect of various experimental parameters, i.e., pH, amount of nanoparticles, concentration of dye and light intensity on the rate of reaction was studied. It was found that the JGB dye degradation gave the best results at a pH of 7.0, dye concentration= 200 ppm and using a 70 mW·cm–2 light intensity with 0.5 g of PbS nanoparticles. At room temperature, the photocatalytic degradation of Janus green B dye was observed about 93.5%