A note on the distance spectra of co-centralizer graphs

Let $G$ be a finite non abelian group. The centralizer graph of $G$ is a simple undirected graph $\Gamma_{cent}(G)$, whose vertex set consists of proper centralizers of $G$ and two vertices are adjacent if and only if their cardinalities are identical [6]. We call the complement of the centralizer graph as the co-centralizer graph. In this paper, we investigate the distance, distance (signless) Laplacian spectra of co-centralizer graphs of some classes of finite non-abelian groups, and obtain some conditions on a group so that the co-centralizer graph is distance, distance (signless) Laplacian integral.Comment: arXiv admin note: substantial text overlap with arXiv:2208.0061

AFM imaging and plasmonic detection of organic thin-films deposited on nanoantenna arrays

In this study, atomic force microscopy (AFM) imaging has been used to reveal the preferential deposition of organic thin-films on patterned nanoantenna array surfaces - identifying the localised formation of both monolayer and multilayer films of octadecanethiol (ODT) molecules, depending on the concentration of the solutions used. Reliable identification of this selective deposition process has been demonstrated for the first time, to our knowledge. Organic thin-films, in particular films of ODT molecules, were deposited on plasmonic resonator surfaces through a chemi-sorption process - using different solution concentrations and immersion times. The nanoantennas based on gold asymmetric-split ring resonator (A-SRR) geometries were fabricated on zinc selenide (ZnSe) substrates using electron-beam lithography and the lift-off technique. Use of the plasmonic resonant-coupling technique has enabled the detection of ODT molecules deposited from a dilute, micromolar (1 M) solution concentration - with attomole sensitivity of deposited material per A-SRR – a value that is three orders of magnitude lower in concentration than previously reported. Additionally, on resonance, the amplitude of the molecular vibrational resonance peaks is typically an order of magnitude larger than that for the non-resonant coupling. Fourier-transform infrared (FTIR) spectroscopy shows molecule specific spectral responses – with magnitudes corresponding to the different film thicknesses deposited on the resonator surfaces. The experimental results are supported by numerical simulation

Deposition of Organic Molecules on Gold Nanoantennas for Sensing

The deposition of organic molecules on gold nanoantennas is reported through chemisorption for sensing in the midinfrared (mid-IR) spectral range. The specific nanostructures are gold asymmetric-split ring resonators (A-SRRs) based on circular-geometry with two different ‘arc’ lengths. The plasmonic resonant coupling technique was used to match the vibrational responses of the targeted molecules for their enhanced detection. Gold nanostructures are functionalised through chemisorption of octadecanethiol (ODT) in ethanol solution. The molecular vibrational responses were measured using a microscope coupled Fourier Transform Infrared (FTIR) spectroscopy. The experimental findings are closely supported using FDTD simulation. The modified nanoantennas surfaces are capable of supporting wide range of organic-sensing applications

Medical termination of a partial hydatidiform mole with coexisting fetus during second trimester; management dilemma: a case report

Partial hydatidiform mole and coexisting foetus is a rare condition, with an incidence of 122,000-1,000,000 pregnancies. It presents a dilemma for obstetricians when detected in second trimester of pregnancy. Medical termination is effective during second trimester; however, it increases the risk of occurrence of persistent trophoblastic disease. Following a review of literature, it was seen that most of the PHMCF terminated by medical induction during second trimester resulted in the development of PTD and lung metastasis. However, cases terminated by caesarean section during the third trimester did not develop PTD or metastasis. A 34 year old woman, gravida 3 para 2 at 25 weeks and 3 days of gestation, presented with absent fetal movements. She was markedly pale. She had no prior antenatal visits. Ultrasound examination revealed a single intrauterine foetus at 23 weeks of gestation with no cardiac activity. Spalding sign was positive. Liquor was reduced and showed internal echoes, secondary to intramniotic bleed. Placenta was grossly enlarged, anterior in location with multiple cystic areas suggestive of a partial mole. As her haemoglobin was 5.6 grams, she was transfused with 3 units of packed cells. The patient underwent induced medical abortion after counselling for risk of persistent trophoblastic disease and long term follow up. She was followed up with weekly serial serum beta hCG monitoring, which returned to normal within a month. She showed no signs of persistent trophoblastic disease at 3 months follow up and has been advised to continue follow up for a year. Mid-trimester termination of pregnancy due to PHMCF is challenging due to high risk of PTD and metastasis associated with it. Performance of caesarean section is not recommended during second trimester of pregnancy but is a relatively safer strategy to avoid the risks of persistent trophoblastic disease

Strong magnon-photon coupling with chip-integrated YIG in the zero-temperature limit

The cross-integration of spin-wave and superconducting technologies is a promising method for creating novel hybrid devices for future information processing technologies to store, manipulate, or convert data in both classical and quantum regimes. Hybrid magnon-polariton systems have been widely studied using bulk Yttrium Iron Garnet (Y$_{3}$Fe$_{5}$O$_{12}$, YIG) and three-dimensional microwave photon cavities. However, limitations in YIG growth have thus far prevented its incorporation into CMOS compatible technology such as high quality factor superconducting quantum technology. To overcome this impediment, we have used Plasma Focused Ion Beam (PFIB) technology -- taking advantage of precision placement down to the micron-scale -- to integrate YIG with superconducting microwave devices. Ferromagnetic resonance has been measured at millikelvin temperatures on PFIB-processed YIG samples using planar microwave circuits. Furthermore, we demonstrate strong coupling between superconducting resonator and YIG ferromagnetic resonance modes by maintaining reasonably low loss while reducing the system down to the micron scale. This achievement of strong coupling on-chip is a crucial step toward fabrication of functional hybrid quantum devices that advantage from spin-wave and superconducting components.Comment: 10 pages, 6 figure

Array metasurfaces for biomedical sensing at infra-red wavelengths

Detection and identification of biomedically significant molecules is an important application in infra-red (IR) spectroscopy. This presentation will consider some of the significant features of the different alternative building-block elements that can be used in array metasurfaces for enhanced detection sensitivity. The presentation will also address techniques and issues associated with the deposition and localisation of biological and organic chemical molecular material for detection and measurement using IR spectroscopy

Optimisation of Wafer-Scale Superconducting Qubit-Devices [Seminar]

No abstract available

Optimising Process Fabrication of Superconducting Qubits

No abstract available

Fabrication of Superconducting-Devices for Quantum Technologies

No abstract available

Single Step Kinetic Inductance Parametric Amplifier with Large Signal Gain

No abstract available