We present a design methodology for free-space beam-forming with general profiles from grating couplers which avoids the need for numerical optimization, motivated by applications in ion trap physics. We demonstrate its capabilities through a variety of gratings using different wavelengths and waveguide materials, designed for new ion traps with all optics fully integrated, including UV and visible wavelengths.

Semiconductor quantum dots (QDs) enable the generation of single and entangled photons for applications in quantum information and quantum communication. While QDs emitting in the 780nm to 950nm spectral range feature closeto-ideal single-photon purities and indistinguishabilities, they are not the best choice for applications in fiber-optical networks, due to the high optical losses in this wavelength regime. The preferable choice here are QDs operating in the lowest-loss spectral window around 1550 nm (telecom C-band).

Eigenstate coalescence in non-Hermitian systems is widely observed in diverse scientific domains encompassing optics and open quantum systems. Recent investigations have revealed that adiabatic encircling of exceptional points (EPs) leads to a nontrivial Berry phase in addition to an exchange of eigenstates. Based on these phenomena, we propose in this work an exhaustive classification framework for EPs in non-Hermitian physical systems. In contrast to previous classifications that only incorporate the eigenstate exchange effect, our proposed classification gives rise to finer Z2 classifications depending on the presence of a π Berry phase after the encircling of the EPs.

This paper addresses perturbative aspects of the renormalization of a fermion with mass dimension one non-minimally coupled to the electromagnetic field. Specifically, we calculate the one-loop corrections to the propagators and vertex functions of the model and determine the one-loop beta function of the non-minimal electromagnetic coupling. Additionally, we perform calculations of the two-loop corrections to the gauge field propagator, demonstrating that it remains massless and transverse up to this order. We also find that the non-minimal electromagnetic coupling can exhibit asymptotic freedom if a certain condition is satisfied. As a potential dark matter candidate, these findings suggest that the field may decouple at high energies.

Centrifugal pump operation, abnormal operating conditions, nonconformance of pump output
to recovery rate, reduction of dynamic fluid level in the oil well, centrifugal pump temperature rise,
pump output reduction as a function of the pump shaft rotation speed change, pump temperature
decrease as a result of the pump rotation speed reduction, avoidance of salt deposition in centrifugal
pumps.

Seismic full-waveform inversion (FWI) provides high resolution images of the subsurface by exploiting information in the recorded seismic waveforms. This is achieved by solving a highly nonnlinear and nonunique inverse problem. Bayesian inference is therefore used to quantify uncertainties in the solution. Variational inference is a method that provides probabilistic, Bayesian solutions efficiently using optimization.

A superconductor exhibiting a polarity-dependent critical current is of fundamental as well as technological interest because the superconducting (SC) layer can then admit a perfect dissipationless transmission along one direction while offering a large resistance along the opposite, leading to a phenomenon called the SC diode effect or rectification.

The nearing end of Moore’s Law has been driving the development of domain-specific hardware tailored to solve a special set of problems. Along these lines, probabilistic computing with inherently stochastic building blocks (p-bits) have shown significant promise, particularly in the context of hard optimization and statistical sampling problems. p-bits have been proposed and demonstrated in different hardware substrates ranging from small-scale stochastic magnetic tunnel junctions (sMTJs) in asynchronous architectures to large-scale CMOS in synchronous architectures. Here, we design and implement a truly asynchronous and medium-scale p-computer (with  800 pbits) that closely emulates the asynchronous dynamics of sMTJs in Field Programmable Gate Arrays (FPGAs).

The diffusion, penetration and intercalation of metallic atomic dopants is an important question for various graphite applications in engineering and nanotechnology. We have performed systematic first-principles calculations of the behaviour of ruthenium nanoclusters on a graphene monolayer and intercalated them into a bilayer. Our computational results show that at a scientifically high density of single Ru atom interstitials, intercalated atoms can shear the surrounding lattice to an AA stacking configuration, an effect which weakens with increasing cluster size. Moreover, the interlayer stacking configuration, in turn, has a significant effect on cluster diffusion.

In this work, we propose a non-volatile memory (STeP-CiM) for ternary DNNs that can perform signed ternary dot product computation-in-memory. The CiM operation in our design is based on piezoelectric induced dynamic bandgap modulation in PeFETs.

The mutual communication between nano-scale devices will make it possible for nanotechnology to be applied in the fields like disease sensing, drug delivery, environmental monitoring, etc [1]. Due to the limited size and capabilities of one single nanomachine, a large number of nanomachines that cooperate to form a nanonetwork are attractive for completing complex tasks [2]. Inspired by nature, molecular communication that uses molecular coding, transmission, and reception.

Recent studies have reported the detection of the galactic stellar halo wake and dipole triggered by the Large Magellanic Cloud (LMC), mirroring the corresponding response from dark matter (DM).