Squeezing anyons for braiding on small lattices

Adiabatically exchanging anyons gives rise to topologically protected operations on the quantum state of the system, but the desired result is only achieved if the anyons are well separated, which requires a sufficiently large area. Being able to reduce the area needed for the exchange, however, would have several advantages such as enabling a larger number of operations per area and allowing anyon exchange to be studied in smaller systems that are easier to handle. Here, we use optimization techniques to squeeze the charge distribution of Abelian anyons in lattice fractional quantum Hall models, and we show that the squeezed anyons can be exchanged within a smaller area with a close to ideal outcome. We first use a toy model consisting of a modified Laughlin trial state to show that one can shape the anyons without altering the exchange statistics under certain conditions. We then squeeze and braid anyons in the Kapit-Mueller model and an interacting Hofstadter model by adding suitable potentials. We consider a fixed system size, for which the charge distributions of the normal anyons overlap, and we find that the outcome of the exchange process is closer to the ideal value for the squeezed anyons. The time needed for the exchange is also important, and for a particular example we find that the duration needed for the process to be close to the adiabatic limit is about five times longer for the squeezed anyons when the path length is the same. Finally, we show that the exchange outcome is robust with respect to small modifications of the potential away from the optimized value

Quantum many-body scars with chiral topological order in two dimensions and critical properties in one dimension

We construct few-body, interacting, nonlocal Hamiltonians with a quantum scar state in an otherwise thermalizing many-body spectrum. In one dimension, the embedded state is a critical state, and in two dimensions, the embedded state is a chiral topologically ordered state. The models are defined on slightly disordered lattices, and the scar state appears to be independent of the precise realization of the disorder. A parameter allows the scar state to be placed at any position in the spectrum. We show that the level spacing distributions are Wigner-Dyson and that the entanglement entropies of the states in the middle of the spectrum are close to the Page value. Finally, we confirm the topological order in the scar state by showing that one can insert anyons into the state

Packaging Problems-Present and Future of Service Rations

Developments of food packaging from the early days of rigid containers up to the modern method of using flexible materials are revealed. Factors involving the selection for packing different types of Service rations are discussed. Future areas of research and development activity are outlined briefly

Prosthesis for a Case of Subtotal Orbital Exenteration

Aims and objectives: To rehabilitate a patient with subtotal orbital exenteration defect. Case description: A 32 year old male with history of carcinoma of ethmoid, treated surgically with subtotal orbital exenteration presented with a defect communicating with the pharynx. He was rehabilitated with a prosthetic eye. Conclusion: A two piece cast with a removable part containing the defect made it very easy to fabricate the prosthesis. Patient was happy with the appearance and expressed satisfaction.&nbsp

Topological quantum many-body scars in quantum dimer models on the kagome lattice

We present a class of quantum dimer models on the kagome lattice with full translational invariance that feature a quantum many-body scar state of analytically known entanglement properties within their spectra. Using exact diagonalization on lattices of up to 60 sites, we show that nonscar states conform to the eigenstate thermalization hypothesis. Specifically, we show that energies are distributed according to the Gaussian ensemble expected of their respective symmetry sector, illustrate the existence of the scar from bipartite entanglement properties, and demonstrate revival phenomena in studies of fidelity dynamics

TRENDS IN IT HUMAN RESOURSES AND END-USERS INVOLVED IN IT APPLICATIONS

The Bureau of Labor Statistics projected the demand for information technology (IT) human resources to increase by 13.26 percent between 2014 and 2024. In this survey research, the IT professionals estimated a growth of 34.16 percent in IT human resources over a period of five years from the year 2016. The goal of this survey study was to try to understand the discrepancy in the estimates for IT human Resources requirements by developing a theory-driven model to evaluate the impact of growth in IT outsourcing/offshoring, cloud-computing, end-users-computing, IT applications, and usage of commercial-off-the-shelf/ERP on the need for IT human resources

1x2 optical packet switch using all-optical header processing

A 1×2 all-optical packet switch is presented. The header processing is implemented by using a SLALOM structure and an optical flip-flop memory is used to store the processed header bits. The packets are switched in wavelength by using cross-gain modulation. Experimental results are presente

Detecting and reacting to changes in reputation flows

Proceeding volume: IFIP AICT 358/2011Peer reviewe