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Characterizing Entanglement and Quantum Correlations Constrained by Symmetry
This thesis focuses on the study and characterization of entanglement and nonlocal correlations constrained under symmetries. It includes original results as well as detailed methods and explanations for a number of different threads of research: positive partial transpose (PPT) entanglement in the symmetric states; a novel, experimentally friendly method to detect nonlocal correlations in many-body systems; the non-equivalence between entanglement and nonlocality; and elemental monogamies of correlations. Entanglement and nonlocal correlations constitute two fundamental resources for quantum information processing, as they allow novel tasks that are otherwise impossible in a classical scenario. However, their elusive characterization is still a central problem in quantum information theory. The main reason why such a fundamental issue remains a formidable challenge lies in the exponential growth in complexity of the Hilbert space as well as the space of multipartite correlations. Physical systems of interest, on the other hand, display symmetries that can be exploited to reduce this complexity, opening the possibility that some of these questions become tractable for such systems.
Quality of Information and Communications Technology
This book constitutes the refereed proceedings of the 14th International Conference on the Quality of Information and Communications Technology, QUATIC 2021, held in Algarve, Portugal*, in September 2021. The 30 full papers and 9 short papers were carefully reviewed and selected from 98 submissions. The papers are organized in topical sections: ICT verification and validation; software evolution; process modeling, improvement and assessment; quality aspects in quantum computing; safety, security, and privacy; quality aspects in machine learning, AI and data analytics; evidence-based software quality engineering; quality in cyber-physical systems; software quality education and training. *The conference was held virtually due to the COVID-19 pandemic.
Lectures on Quantum Computation, Quantum Error Correcting Codes and Information Theory
These notes are based on a course of about twenty lectures on quantum computation, quantum error correcting codes and information theory. The topics include a comparative description of the basic features of classical probability theory on finite sample spaces and quantum probability theory on finite dimensional complex Hilbert spaces, quantum gates and cicuits, simple examples of circuits arising from quantum teleportation, communication through EPR pairs and arithmetical computations on a quantum computer, more sophisticated examples of such circuits in the context of Fourier transform and phase estimation, a detailed account of the order finding algorithm as well as the celebrated Shor's ...
Algorithms for Minimization Without Derivatives
DIVOutstanding text for graduate students and research workers proposes improvements to existing algorithms, extends their related mathematical theories, and offers details on new algorithms for approximating local and global minima. /div
Quantum Atom Optics
The rapid development of quantum technologies has driven a revolution in related research areas such as quantum computation and communication, and quantum materials. The first prototypes of functional quantum devices are beginning to appear, frequently created using ensembles of atoms, which allow the observation of sensitive, quantum effects, and have important applications in quantum simulation and matter wave interferometry. This modern text offers a self-contained introduction to the fundamentals of quantum atom optics and atomic many-body matter wave systems. Assuming a familiarity with undergraduate quantum mechanics, this book will be accessible for graduate students and early career researchers moving into this important new field. A detailed description of the underlying theory of quantum atom optics is given, before development of the key, quantum, technological applications, such as atom interferometry, quantum simulation, quantum metrology, and quantum computing.
Tensor Network Contractions
Tensor network is a fundamental mathematical tool with a huge range of applications in physics, such as condensed matter physics, statistic physics, high energy physics, and quantum information sciences. This open access book aims to explain the tensor network contraction approaches in a systematic way, from the basic definitions to the important applications. This book is also useful to those who apply tensor networks in areas beyond physics, such as machine learning and the big-data analysis. Tensor network originates from the numerical renormalization group approach proposed by K. G. Wilson in 1975. Through a rapid development in the last two decades, tensor network has become a powerful ...
Amb uns altres ulls
La biografia definitiva de Montserrat Roig. L'única autoritzada pels seus familiars i que disposa de material inèdit procedent del llegat personal i familiar de l'autora. Montserrat Roig Francitorra (1946-1991) va ser una escriptora catalana de projecció internacional. Les seves obres, escrites originalment en català o en castellà, d'àmplia acceptació pel públic, s'han traduït a l'anglès, francès, italià, alemany i hongarès. Les escrites en català -que corresponen a la seva novel·lística i part del seu assaig- es van traduir també al castellà durant el període de més èxit de l'autora. Avui, la seva obra ha anat guanyant en reconeixement i es continua venent arreu del mó...
European Regions
At the beginning of the 21st century, the EU is facing deep political, social, and economic changes. The benefit of supranational organization is no longer obvious to European citizens and questions of legitimacy have accompanied the EU's development over the last decades. Regions - albeit often deemed »obsolete« - present themselves as stable and reliable partners in this turbulent environment: in being important objects of identification to their citizens, but also relevant political and legal entities in the EU's multilevel governance system. This edited volume asks about the role of regions and regional identity in a European Union that is perhaps struggling more than ever about its future.
Federal-type Solutions and European Integration
This volume, based on papers delivered at a conference in Bruges, Belgium, explores the development of European federalism. The contributors also examine the political systems of other countries such as the U.S. and Canada in order to gain insight into European integration. Some of the topics covered in the volume include recent attitudes of the German Lander towards European integration; citizenship and European union; federalism and the environment; the language problem in European integration; and the politics and administration of federalism. Contributors: Wilifred Martens, Daniel Elazar, Alain Gagnon, Michael Burgess, John Kincaid, C. Lloyd Brown-John, Stephen Schechter, Bruce McDowell, Kieran St. Clair Bradley, Joachim Jens Hesse, Ronald Watts, Nicolas Schmitt, Cheryl Saunders, Frans Vanistendael, Marcelo Duarte, Jean Beaufays, Wolfgang Renzsch, Reinhard Rack, Audrey Brassloff, Gary Miller, Jacob Landau, Alexander Murphy, Maureen Covell, Rudolf Hrbek, Karel Rimanque, and Andre Alen.
Maarten van Heemskerck’s Rome
This book presents the first sustained study of the stunning drawings of Roman ruins by Haarlem artist Maarten van Heemskerck (1498–1574; in Rome, 1532–ca. 1537). In three parts, Arthur J. DiFuria describes Van Heemskerck’s pre-Roman training, his time in Rome, and his use his ruinscapes for the art he made during his forty-year post-Roman phase. Building on the methods of his predecessors, Van Heemskerck mastered a dazzling array of methods to portray Rome in compelling fashion. Upon his return home, his Roman drawings sustained him for the duration of his prolific career. Maarten van Heemskerck’s Rome concludes with the first ever catalog to bring together all of Van Heemskerck’s ruin drawings in state-of-the-art digital photography.
