Browsing by Subject "Transfer"
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Item Open Access The adiabatic and non-adiabatic behavior of a particle in optical lattices(Bilkent University, 2018-06) Yılmaz, FıratThe cold atom experiments provide a clean and controlled environment for realizing many body systems. Recent realizations of artificial gauge fields and adjustable optical lattices paved the way for the study of effectively charged particles with neutral atoms in various lattice and continuum systems. Moreover, it is possible to precisely control the external system parameters, i.e. the artificial gauge fields much faster or slower than the time scales associated with atomic motion in the lattice. It still needs further analysis to fully understand how the adiabatic and non-adiabatic changes affect the stationary and dynamical behavior of the system. We first investigate the effect of the adiabatic changes in the artificial gauge fields, and focus on the famous problem: A charged particle in a periodic potential under magnetic field. This simple system leads a complicated and involved selfsimilar energy spectrum, the Hofstadter butterfly. The whole structure of this energy spectrum is determined by the lattice geometry as well as the external field. In this regard, we consider all possible Bravais lattices in two dimensions and investigate the structure of the Hofstadter butterfly as the different point symmetry groups of the lattices are adiabatically deformed from one into another. We find that each 2D Bravais lattice is uniquely mapped to a fractal energy spectrum and it is possible to understand the interplay between the point symmetry groups and the energy spectrum. This beautiful spectrum, in addition, consists of infinitely many topologically distinct regions as a function of magnetic flux and gap number. The topological character of energy bands are determined through their Chern numbers. We calculate the Chern numbers of the major gaps and Chern number transfer between bands during the topological transitions. In the second part, we investigate the dramatic effect of the non-adiabatic changes in the artificial gauge fields. In a synthetic lattice, the precise control over the hopping matrix elements makes it possible to change this artificial magnetic field non-adiabatically even in the quench limit. We consider such a magneticflux quench scenario in synthetic dimensions. Sudden changes have not been considered for real magnetic fields as such changes in a conducting system would result in large induced currents. Hence we first study the difference between a time varying real magnetic field and an artificial magnetic field using a minimal six-site model which leads to gauge dependent results. This model proves the relation between the gauge dependant dynamics and the absence of scalar potential terms connecting different gauge potentials. In this context, we secondly search for clear indication of the gauge dependent dynamics through magnetic flux quenches of wave packets in two- and three-leg synthetic ladders. We show that the choice of gauge potentials have tremendous effect on the post-quench dynamics of wave packets. Even trivially distinct two vector potentials by an additive constant can produce observable effects, we investigate the effects on the Landau levels and the Laughlin wave function for a filling factor ν = 1/q. We also show that edge solutions in a wide synthetic ladder are protected under a flux quench only if there is another edge state solution in the quenched Hamiltonian.Item Restricted Antalya İplik ve Pamuklu Dokuma Fabrikası'nın tarihi(Bilkent University, 2021) Köse, Beyza Simay; Şimşek, Melike; Altınışık, Mustafa Asım; Koç, Mustafa Kaan; Torusdağ, Ömer Bahadır1950’lerden itibaren çeşitli teşvik ve yatırımlarla birlikte, işsizliği azaltmak ve ovalardaki pamuk üretiminin artışından faydalanmak amacıyla Antalya İplik ve Pamuklu Dokuma Fabrikası’nın kurulması planlandı. 1955’te bir devlet/özel sektör ortak girişimi olarak kuruldu ve 1961 yılında üretime başladı. 2004’te Sümer Holding Yönetim Kurulu fabrikayı resmen kapatma kararı aldı. Bu kararın ardından çeşitli el değiştirmeler sonucunda fabrika Antalya Belediyesi’ne devredildi ve fabrika için müzeye dönüştürme kararı alındı. Tesis son devirden sonra müze olarak faaliyet göstermeye başladı.Item Open Access Commonsense aspects of buying and selling(Taylor & Francis Inc., 1996) Akman, V.; Ersan, M.We describe an experimental approach toward implementing a commonsense "microtheory" for buying and selling. Our prototype system characterizes how intelligent agents hold items and money, how they buy and sell items, and the way money and items are transferred. The ontology of the system includes money (cash, check, credit card), agents (people, organizations), items (movable, real estate, service), barter, and the notions of transfer, loan, buying by installments, profit, and loss.Item Open Access Transfer 2.0: applying the concept of transfer from track-two workshops to inclusive peace negotiations(Oxford University Press, 2020) Çuhadar, Esra; Paffenholz, T.This article argues that the scholarly study of “transfer” from track-two workshops to track-one negotiations is highly applicable to the study of transfer from other modalities of participation to track-one in inclusive peace negotiations. During the last decade, other approaches to make negotiations more inclusive have also been increasingly employed, such as national dialogue conferences, variety of consultation mechanisms, or a diverse set of peace commissions. In this paper, we aim to expand the conceptualization of transfer beyond ICR workshops and discuss how the knowledge accumulated concerning transfer in the ICR literature during the last decades can be applied to understand and evaluate transfer from other inclusion modalities used in peace negotiations today. We therefore make a distinction between the first generation of transfer (1.0) developed by the ICR workshops scholars and practitioners and the transfer process from other modalities used in inclusive negotiations (2.0). To apply the lessons learned from transfer 1.0 to 2.0, we start with an overview of the concept as developed in track-two literature. We then suggest a conceptualization of transfer 2.0, based on insights from how it has unfolded in five of the seven inclusion modalities examined in our comparative case study. We discuss the similarities and differences between transfer 1.0 and 2.0 and how transfer 2.0 can be studied, including and beyond track-two initiatives. We conclude by suggesting a number of directions for future research on transfer 2.0 that are relevant to several inclusion modalities.