Quantum feedback control protocols can improve the operation of quantum devices. Here we examine the performance of a purification protocol when there are imperfections in the controls. The ideal feedback protocol produces an x eigenstate from a mixed state in the minimum time, and is known as rapid state preparation. The imperfections we examine include time delays in the feedback loop, finite...

A study is presented of the post-buckling behavior and imperfection-sensitivity of complete spherical shells subject to uniform external pressure. The study builds on and extends the major contribution to spherical shell buckling by W.T. Koiter in the 1960’s. Numerical results are presented for the axisymmetric large deflection behavior of perfect spheres followed by an extensive analysis of th...

We examine whether loss leading pricing strategies in multiproduct retailing should be a target of antitrust policy. Loss leading is modeled in the presence of imperfect competition and consumer information in a stage game framework. We show that price constraints, used as a second-best instrument, targeted at loss leading can interact with market imperfections to create distortions that can on...

In this paper the effect of random geometric imperfections on the critical load of isotropic, thin-walled, cylindrical shells under axial compression with rectangular cutouts is presented. Second moment characteristics of geometric imperfections are estimated by data of available measurements, a simulation procedure based on the Karhunen-Loéve expansion is applied for generating realizations of...

Precise positioning of magnetic solitons requires controllable artificial pinning, while the accurate determination pinning profile remains a challenge. Here, we propose topological solution to this problem. Taking domain wall (DW) as representative example, study collective dynamics interacting DWs in racetrack with sites alternate distances. By mapping governing equations DW motion Su-Schrief...

Rings of trapped ions are an attractive system to study quantum-many body dynamics with closed boundary conditions as well as symmetry breaking. One of the biggest challenges towards such experiments is to sufficiently suppress rotational imperfections of the trapping potential and to allow for instance freely rotating ring structures. We show how to overcome this challenge with a surface trap ...

The present study investigates torsional and compressive loading of a paperboard package. Finite element (FE) analyses simulating the tests were performed to improve understanding stresses deformations in during loading. A simple experimental characterization necessary material properties could be represent multi-ply as single-ply structure. results from model compared with laminate model, diff...

We review various interpretations of the phrase “model error”, choosing to focus here on how to quantify and minimise the cumulative effect of model “imperfections” that either have not been eliminated because of incomplete observations/understanding or cannot be eliminated because they are intrinsic to the model’s structure. We will not provide a recipe for eliminating these imperfections, but...

The pulse shape deformation of 80 ps Gaussian input transmitted through a Fabry-P6rot has been determined experimentally and theoretically as a function of the mirror spacing. The effect of mirror surface imperfections is discussed and it is shown that for not too large imperfections there is a strong influence on the transmitted pulse energy whereas the transmitted pulse shape remains almost u...

Capital market imperfections are widely believed to explain why consumption deviates from the martingale implications of the REPIH. However, empirical modelling and theoretical analysis of consumption under capital market imperfections is hindered by the absence of any tractable theoretical model. By modelling capital market imperfections as consumers facing an upward sloping interest rate sche...