Sub Decoherence Time Generation and Detection of Orbital Entanglement

Recent experiments have demonstrated sub decoherence time control of individual single-electron orbital qubits. Here we propose a quantum dot based scheme for generation and detection of pairs of orbitally entangled electrons on a timescale much shorter than the decoherence time. The electrons are entangled, via two-particle interference, and transferred to the detectors during a single cotunneling event, making the scheme insensitive to charge noise. For sufficiently long detector dot lifetimes, cross-correlation detection of the dot charges can be performed with real-time counting techniques, opening up for an unambiguous short-time Bell inequality test of orbital entanglement.Comment: 5 pages, 2 figures, 3 pages supplemental materia

Nondegeneracy of the Ground State for Nonrelativistic Lee Model

In the present work, we first briefly sketch construction of the nonrelativistic Lee model on Riemannian manifolds, introduced in our previous works. In this approach, the renormalized resolvent of the system is expressed in terms of a well-defined operator, called the principal operator, so as to obtain a finite formulation. Then, we show that the ground state of the nonrelativistic Lee model on a compact Riemannian manifolds is nondegenerate using the explicit expression of the principal operator that we obtained. This is achieved by combining heat kernel methods with positivity improving semi-group approach and then applying these tools directly to the principal operator, rather than the Hamiltonian, without using cut-offs.Comment: 16 pages, typos are corrected, abstract and some sentences in the text are improved. Appears in Journal of Mathematical Physics, volume 55, issue 8 (2014

Sequential alignment and position verification system for functional proton radiosurgery

The purpose of this project is to improve the existing version of the Sequential Alignment and Position Verification System (SAPVS) for functional proton radiosurgery and to evaluate its performance after improvement

Attitudes of Sport Science Students Regarding to Gender Roles

Social gender is the difference that gender creates in a society, it is related to how one thinks of him or herself, how him or her interacts with others, social opportunities, professions, family roles, and the roles allowed for men and women. There is pluralist participation and a sense of justice in the philosophy of sports. In this context, all stakeholders (athletes, coaches, assistants, etc.) involved in sports activities are expected to evaluate and interpret sports activities in this context. The research was carried out using quantitative research method. A total of 318 students from the School of Physical Education and Sports (fourth grade) of Kastamonu University participated in the study. Perception Gender Scale consisting of 1 dimensions and 25 items, created by Altinova and Duyan (2013) was used as measurement tool. High average score of the scale indicates the positive perception of society gender roles. The data were found to be normally distributed and parametric test methods were used. According to results of the research conducted, the perceptions of gender of sports science students are at a medium level. In addition, gender perceptions of female sports science students were differentiated from male sports science students. The perceptions of gender did not differ among sports science students within the scope of the departments they received education. In addition, a low level of negative correlation was found between the ages of sports science students and their gender perceptions

The relationship between management styles and trainers’ job motivation in the public institutions

The study aimed to determine the relationship between perceptions of management styles and trainers' motivation in the public sports institutions, and to examine the effect of management styles on job motivation. The sample of the research consists of 190 trainers, 18 of whom are women and 172 of whom are men working in the public sports institutions. In the study, descriptive scanning method was used, and the data obtained were analyzed by making statistical procedures such as frequency, correlation, regression analysis. It was found that democratic management style and paternalist management style had a positive effect on trainers’ job motivation. However, the liberal management style and authoritarian management style were found to have a negative effect on trainers’ job motivation

Optimal geometry of lateral GaAs and Si/SiGe quantum dots for electrical control of spin qubits

We investigate the effects of the orientation of the magnetic field and the orientation of a quantum dot, with respect to crystallographic coordinates, on the quality of an electrically controlled qubit realized in a gated semiconductor quantum dot. We find that, due to the anisotropy of the spin-orbit interactions, by varying the two orientations it is possible to tune the qubit in the sense of optimizing the ratio of its couplings to phonons and to a control electric field. We find conditions under which such optimal setup can be reached by solely reorienting the magnetic field, and when a specific positioning of the dot is required. We also find that the knowledge of the relative sign of the spin-orbit interaction strengths allows to choose a robust optimal dot geometry, with the dot main axis along [110], or [110], where the qubit can be always optimized by reorienting the magnetic field

Corporate Ventures: Relational Microfoundations of Innovation Performance

Large, established companies invest in innovation to sustain and improve their competitiveness. In addition to in-house R&D departments, they acquire startup companies and operate them under a separate organizational structure. Corporate ventures’ success depends on many factors, such as available resources, compensation schemes, and acquisition strategies, which have been explored in the extant literature. This study explores the antecedents of corporate venture innovation performance through the lens of dynamic capabilities and social capital theories. Existing research on dynamic capabilities has explored its microfoundations of managerial cognition and top management initiatives. However, the development of dynamic capabilities requires actors’ level interactions and dialogue to generate tacit knowledge. This research closes the gap in the literature of microfoundations by exploring direct social interactions that may support high level innovativeness through the mechanism of humanistic influence. In addition, social capital theory that predicts the development of intellectual capital forms the basis to create competitive advantage. However, the study follows social psychology theory to identify relational antecedents that can predict removal of social and mental barriers and build the foundation of tacit knowledge creation. This approach is significantly different than traditional social capital development based on trust, network and the development of organizational norms. A survey questionnaire is used to extract primary data from 156 engineers and scientists working at a global medical device manufacturing company\u27s corporate venture organization. Structural Equation Modeling is used to determine the significance and loading of relational antecedents that can predict the corporate venture\u27s innovation performance. The findings confirm the antecedents such as conscious awareness, altruistic behavior and alignment of goals are significant to predict innovativeness of corporate ventures. The study expands the theory of microfoundations of dynamic capabilities and will be a useful guide to corporate venture managers

When should I have it?: the effect of representation and processing concreteness on consumer impatience

Consumers frequently make decisions about when to consume a product and what costs to incur to obtain sooner consumption. Prior research has demonstrated that consumers show decreasing levels of impatience as the length of delay for consumption gets longer (i.e., present-biased preferences or hyperbolic discounting). In this dissertation, I explore the roots of decreasing consumer impatience and identify factors that lead to differential sensitivity to time horizon. In two essays, I show that the concreteness of mental representation and of processing are two possible mechanisms behind present-biased preferences. I hypothesize that present-biased preferences are observed when mental representations and processing are concrete, and that this effect is attenuated when consumers think more abstractly. In essay 1, I examine the role of representational concreteness by making use of two temporal frames (delay and expedite) that differ in their associated degree of concreteness. I show that (1) defer and expedite frames are associated with different patterns of discounting, (2) the two frames are associated with differential levels of outcome concreteness, and (3) this variation in outcome concreteness can explain the difference in present bias. In essay 2, I explore the role of processing concreteness (e.g., focusing on the big picture or on the details) in consumers' present bias. I hypothesize and show that consumers who think more concretely will be more prone to hyperbolic-like discounting compared to those who think abstractly - even when processing concreteness is manipulated using an unrelated task. Taken together, this dissertation provides a better understanding of the psychological mechanisms driving intertemporal preferences in general and present-biased preferences in specific. I examine the cognitive underpinnings of present-biased preferences and use temporal framing (Essay 1) and prior decisions (Essay 2) to establish concreteness of outcomes and processing as potential sources of decreasing impatience. The results reported in this dissertation extend the current theorization in intertemporal choice, temporal framing, mental construal, and sequential decisions. These findings suggest that conceptualizing concreteness at multiple levels helps explain not only hyperbolic discounting, but also adds to the understanding of several related consumer behavior phenomena

Good performance in difficult times? Threat and challenge as contributors to achievement emotions and academic performance during the COVID-19 outbreak

IntroductionThe COVID-19 pandemic has emerged as one of the most formidable global crises, leading to the disruptions to education systems worldwide and impacting learning attitudes and psychological well-being of various learner groups, including university students. In this context, students’ appraisals of adverse learning situations play a key role. It is not just the learning situation, but rather students’ appraisal of it which impacts their emotions, attitudes, and behaviors in academic context. The aim of the present study was to investigate how university students’ challenge and threat appraisals were related to emotional learning experiences and learning outcomes during the COVID-19 pandemic. Furthermore, the study focuses on the role of personal and external resources for learning in this context.MethodsAltogether, 428 students, who attended a Psychology lecture at one Austrian university, filled in a questionnaire about their challenge and threat appraisals of learning circumstances during the COVID-19 pandemic, achievement emotions they experienced during this time as well as gender, proneness to anxiety, academic self-concept, and learning resources. Additionally, students’ performance in the examination was recorded.ResultsThe structural equation model emphasizes a crucial role of challenge and threat appraisals for students’ achievement emotions in learning and exam preparation during the COVID-19 pandemic. Challenge appraisals were the strongest predictor for pleasant emotions and threat appraisals were strongest predictor for unpleasant emotions. Proneness to anxiety was related to threat appraisal as well as to experience of more unpleasant and, surprisingly, to positive emotions in adverse learning situation. Academic self-concept and learning resources were identified as important resources for learning in adverse learning situation. Unpleasant achievement emotions were directly and negatively related to academic performance and may thus be seen as a critical variable and crucial obstacle to academic performance.DiscussionThe present study provides implications for learning and instructions which could be implemented by universities in order to support learning and learning attitudes among university students in adverse learning situations