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Author: Linsen Wu Publisher: ISBN: Category : Electrical engineering Languages : en Pages :
Book Description
Internet traffic keeps increasing in the past years and it is dominated by various multimedia applications with different requirements. Due to the explosion of information, traditional network architecture cannot meet the requirement of the traffic trends. Dense Wavelength Division Multiplexing (DWDM) technology has greatly increased the bandwidth of the optical network by merging hundreds of wavelengths into a single fiber. However, the traditional topology of the network restricts the development of advanced network technologies. Software-Defined Optical Networking (SDON), inspired by Software-Defined Networking (SDN), is a promising solution for the problem. In this dissertation, self-resilient reconfigurable optical network is proposed to support multiple switching modes in SDON. A reliable retransmission mathematical model is developed in the proposed network to evaluate the delay of the transmission and the buffer occupancy in the router. Besides, network security becomes more and more important in information transmission. Classical cryptography is based on the complexity of computation. With the increasing power of supercomputers and the development of quantum computers, classical cryptography is becoming more and more vulnerable. Compared to classical cryptography, quantum cryptography is based on the law of physics, and in the only means with provable security. This dissertation is the first to analyze the impact of noise as well as practical attenuated laser sources on multi-photon quantum cryptography protocols. The results provide insights in developing practical quantum cryptography hardware systems.
Author: Linsen Wu Publisher: ISBN: Category : Electrical engineering Languages : en Pages :
Book Description
Internet traffic keeps increasing in the past years and it is dominated by various multimedia applications with different requirements. Due to the explosion of information, traditional network architecture cannot meet the requirement of the traffic trends. Dense Wavelength Division Multiplexing (DWDM) technology has greatly increased the bandwidth of the optical network by merging hundreds of wavelengths into a single fiber. However, the traditional topology of the network restricts the development of advanced network technologies. Software-Defined Optical Networking (SDON), inspired by Software-Defined Networking (SDN), is a promising solution for the problem. In this dissertation, self-resilient reconfigurable optical network is proposed to support multiple switching modes in SDON. A reliable retransmission mathematical model is developed in the proposed network to evaluate the delay of the transmission and the buffer occupancy in the router. Besides, network security becomes more and more important in information transmission. Classical cryptography is based on the complexity of computation. With the increasing power of supercomputers and the development of quantum computers, classical cryptography is becoming more and more vulnerable. Compared to classical cryptography, quantum cryptography is based on the law of physics, and in the only means with provable security. This dissertation is the first to analyze the impact of noise as well as practical attenuated laser sources on multi-photon quantum cryptography protocols. The results provide insights in developing practical quantum cryptography hardware systems.
Author: Pramode K. Verma Publisher: Springer ISBN: 9811086184 Category : Technology & Engineering Languages : en Pages : 226
Book Description
This book explores alternative ways of accomplishing secure information transfer with incoherent multi-photon pulses in contrast to conventional Quantum Key Distribution techniques. Most of the techniques presented in this book do not need conventional encryption. Furthermore, the book presents a technique whereby any symmetric key can be securely transferred using the polarization channel of an optical fiber for conventional data encryption. The work presented in this book has largely been practically realized, albeit in a laboratory environment, to offer proof of concept rather than building a rugged instrument that can withstand the rigors of a commercial environment.
Author: Tyagi, Amit Kumar Publisher: IGI Global ISBN: 1668466988 Category : Science Languages : en Pages : 595
Book Description
Today, computation is an essential component of every technology. However, there has not been much research on quantum computing, even though it has the capability to solve complex problems in an efficient way. Further study is required to fully understand the uses and benefits of this technology. The Handbook of Research on Quantum Computing for Smart Environments presents investigating physical realizations of quantum computers, encoders, and decoders, including photonic quantum realization, cavity quantum electrodynamics, and many more topics on Bits to Qubits. Covering key topics such as machine learning, software, quantum algorithms, and neural networks, this major reference work is ideal for engineers, computer scientists, physicists, mathematicians, researchers, academicians, scholars, practitioners, instructors, and students.
Author: Saroch Leedumrongwatthanakun Publisher: ISBN: Category : Languages : en Pages : 0
Book Description
Transport of information through a multimode optical fibre raises challenges when one wants to increase the data traffic using many spatial modes due to modal cross-talk and dispersion. Instead of considering those complex mixing of modes as a detrimental process, in this dissertation, we harness its mode mixing to process quantum optical information. We implement a reconfigurable linear optical network, a fundamental building block for scalable quantum technologies, based on an inverse photonic approach exploiting the technology of wavefront shaping. We experimentally demonstrate manipulation of two-photon quantum interference on various linear optical networks across both spatial and polarization degrees of freedom. In particular, we experimentally show the zero-transmission law in Fourier and Sylvester interferometers, which are used to certificate the degree of indistinguishability of an input state. Moreover, thanks to the ability to implement a non-unitary network, we observe the photon anti-coalescence effect in all output configurations, as well as the realization of a tunable coherent absorption experiment. Therefore, we demonstrate the reconfigurability, accuracy, scalability and robustness of the implemented linear optical networks for quantum information processing. Furthermore, we study the statistical properties of one-and two-photon speckles generated from various ground-truth states of light after propagating through a multimode fibre. These statistical properties of speckles can be used to extract information about the dimensionality, purity, and indistinguishability of an unknown input state of light, therefore allowing for state classification. Our results highlight the potential of complex media combined with wavefront shaping for quantum information processing.
Author: Robert Hadfield Publisher: Springer ISBN: 3319240919 Category : Computers Languages : en Pages : 256
Book Description
This book presents the basics and applications of superconducting devices in quantum optics. Over the past decade, superconducting devices have risen to prominence in the arena of quantum optics and quantum information processing. Superconducting detectors provide unparalleled performance for the detection of infrared photons in quantum cryptography, enable fundamental advances in quantum optics, and provide a direct route to on-chip optical quantum information processing. Superconducting circuits based on Josephson junctions provide a blueprint for scalable quantum information processing as well as opening up a new regime for quantum optics at microwave wavelengths. The new field of quantum acoustics allows the state of a superconducting qubit to be transmitted as a phonon excitation. This volume, edited by two leading researchers, provides a timely compilation of contributions from top groups worldwide across this dynamic field, anticipating future advances in this domain.
Author: Iris Choi Publisher: ISBN: Category : Quantum computers Languages : en Pages : 214
Book Description
Quantum Key Distribution (QKD) provides a method for 2 parties to exchange keys for encryption purposes. Unlike conventional schemes which rely on unproven mathematical complexity, the security of QKD is guaranteed by laws of physics. This thesis studies and demonstrates the feasibility of using QKD over conventional metropolitan and access networks to enable data security. This thesis consists of 6 chapters. Chapter 1 briefly describes the history of QKD. It also introduces the idea of using QKD for data security over conventional networks and identifies spontaneous Raman scattering as the main challenge to be overcome when designing QKD systems for use on conventional networks. Chapter 2 provides background information on QKD. It explains the physics which enable secure QKD. Chapter 3 is dedicated to the system components used in this PhD. Their physical principles are discussed. Chapter 4, 5 and 6 are experimental chapters where practical implementations of QKD systems over conventional networks will be presented. With novel Raman noise suppression schemes invented during this PhD, the first QKD systems implemented over realistic access networks are demonstrated. Their details will be discussed in Chapter 5 and Chapter 6.
Author: Dagmar Bruss Publisher: John Wiley & Sons ISBN: 3527805796 Category : Science Languages : en Pages : 1155
Book Description
This comprehensive textbook on the rapidly advancing field introduces readers to the fundamental concepts of information theory and quantum entanglement, taking into account the current state of research and development. It thus covers all current concepts in quantum computing, both theoretical and experimental, before moving on to the latest implementations of quantum computing and communication protocols. It contains problems and exercises and is therefore ideally suited for students and lecturers in physics and informatics, as well as experimental and theoretical physicists in academia and industry who work in the field of quantum information processing. The second edition incorporates important recent developments such as quantum metrology, quantum correlations beyond entanglement, and advances in quantum computing with solid state devices.
Author: José Capmany Publisher: ISBN: 0198844409 Category : Languages : en Pages : 361
Book Description
This book provides the first comprehensive, up-to-date and self-contained introduction to the emergent field of Programmable Integrated Photonics (PIP). It covers both theoretical and practical aspects, ranging from basic technologies and the building of photonic component blocks, to designalternatives and principles of complex programmable photonic circuits, their limiting factors, techniques for characterization and performance monitoring/control, and their salient applications both in the classical as well as in the quantum information fields. The book concentrates and focusesmainly on the distinctive features of programmable photonics, as compared to more traditional ASPIC approaches.After some years during which the Application Specific Photonic Integrated Circuit (ASPIC) paradigm completely dominated the field of integrated optics, there has been an increasing interest in PIP. The rising interest in PIP is justified by the surge in a number of emerging applications that callfor true flexibility and reconfigurability, as well as low-cost, compact, and low-power consuming devices.Programmable Integrated Photonics is a new paradigm that aims at designing common integrated optical hardware configurations, which by suitable programming, can implement a variety of functionalities. These in turn can be exploited as basic operations in many application fields. Programmabilityenables, by means of external control signals, both chip reconfiguration for multifunction operation, as well as chip stabilization against non-ideal operations due to fluctuations in environmental conditions and fabrication errors. Programming also allows for the activation of parts of the chip,which are not essential for the implementation of a given functionality, but can be of help in reducing noise levels through the diversion of undesired reflections.
Author: Linsen Wu
Author: Linsen Wu
Author: Pramode K. Verma
Author: Tyagi, Amit Kumar
Author: Saroch Leedumrongwatthanakun
Author: Christoph Söller
Author: Robert Hadfield
Author: Iris Choi
Author: Dagmar Bruss
Author: José Capmany
Author: Chakchai So In