Download or read book Toward a Neutral Atom Quantum Computer written by Xiao Li and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: In this dissertation, I will describe an experiment directed toward making a neutral atom quantum computer. We have loaded and imaged hundreds of single Cs atoms in a randomly half-filled 3D optical lattice with 5 micron spacing. Such a system is a promising starting point for a scalable quantum computer. We collect the scattered laser cooling light to form clear images of single atoms. The imaging is highly unlikely to change the lattice occupancy. We then use two different techniques to cool the atoms to the vibrational ground state in the lattice. Our approach to addressing individual atoms and achieving a single qubit gate will be presented, along with the setup of the tightly focused addressing beam. I will also briefly discuss our two qubit gate scheme and other future work.
Download or read book Progress Towards Generating a 3D Cluster State in a Neutral Atom Quantum Computer written by Felipe Giraldo Mejia and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Entanglement, which means that particles can be correlated to a higher degree than is classically allowed, is a key feature of quantum mechanics. Highly entangled states are important resources for quantum technologies. They can potentially enhance sensing and cryptography, and in quantum computers, allow for information processing at exponential speeds compared to classical computers. A particularly interesting highly entangled state known as a Cluster State has been theoretically predicted to be resilient against errors and imperfections. The main part of this thesis is devoted to our efforts of creating a 3D Cluster State in our neutral atom quantum computer through ultra-cold collisions. To have high fidelity entangling operations through these ultra-cold collisions, we have set up a new set of qubits at a higher magnetic field and a two-photon transition between them. Additionally, we have enhanced our vibrational cooling. We have also explored different possibilities for creating the Cluster State through our entangling operation using a spin-echo structure, which will make the operation more robust. Finally, we have taken preliminary data with the collisional states and devised a plan to remove magnetic field noise in the future to implement the entangling operation. The second part of this thesis delves into a theoretical proposal to measure a subset of qubits without affecting the surrounding ones in neutral atom quantum computers using electromagnetically-induced transparency (EIT). The basis of this proposal is setting up state-selective EIT, which allows some atoms to be imaged while protecting the rest. We investigate in detail three different schemes that would allow for this type of measurement. We reveal the feasibility of this approach, as these schemes only require neutral atom quantum computers one additional beam in order to be implemented. We also explicitly show that the best of these schemes works even with realistic experimental imperfections and can naturally incorporate cooling of the imaged atoms.
Download or read book Progress Towards Quantum Computing with Neutral Atom Arrays written by Xiaoyu Jiang (Ph.D.) and published by . This book was released on 2022 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports progress towards implementing quantum computing applications on a two-dimensional array of neutral atom qubits. While significant progress has taken place in our lab, here we focus on presenting theoretical analysis on various aspects of the project, to help improve the performance of the main experiment. We finished a thorough analysis of the effect of laser noise on 1- and 2-photon Rabi oscillations, with both theoretical analysis and numerical simulations. We developed a theory to directly match a laser's frequency noise power spectral density to its self-heterodyne spectrum measured experimentally. We also predicted the error generated by white noise and spectra with servo-bumps, and our results match well with numerical simulations. A quasi-static theory was also proposed to estimate the error under certain limits, and has demonstrated a good match to numerics. We designed protocols for multi-qubit neutral atom gates. The protocol implements symmetric adiabatic pulses on the k + 1 atoms in the system to implement CkZ gates and CZk gates. The case that we studied assumed equal Rydberg coupling strengths between data qubits for CkZ gates, and 0 coupling between data qubits for CZk gates. We showed that fidelity >0.99 can be achieved for both types of gates, with gate times
Download or read book Neutral Atom Quantum Computing written by Aishwarya Kumar and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum computers might solve several problems thought to be intractable onclassical computers. These include problems like the prime factorization of largenumbers, searching over a solution space and simulations of complex quantumsystems, out of which the latter is the most exciting for physicists. Over the pastfew years, the experimental technologies have matured enough that there has been astrong effort to build the first 50-100 qubit computers in several candidate systems,one of which is neutral atoms. Neutral atoms in light traps have been a leadingtechnology for quantum simulations for many years, but when trapped in opticallattices, they are also promising qubit candidates for a scalable quantum computer.Over the past few years, exquisite control over positions and the internal statesof individual atoms has been developed towards this goal. This thesis describesdevelopment of such control in our three dimensional array of Cesium atoms.We have developed an addressing scheme to target single atoms and executehigh fidelity quantum gates without affecting the stored quantum information inneighboring atoms, a challenging feat in a 3D geometry. As we will see, atomscannot be deterministically loaded in to these arrays, and typically only about halfthe sites have a single atom. Later in the thesis we use our single site control andcombine it with state dependent lattices to move individual atoms and re-arrangethem to yield fully-filled sub-lattices, creating nearly perfect registers of neutralatoms and initializing our quantum computer. We show that this atom "sorting" isan implementation of the famous "demon" thought experiment proposed by JamesClerk Maxwell in 1872. Our experiment, like the demon, decreases the entropy ofthe system in the process of creating an ordered state from a random disorderedone. Finally, we use our state dependent lattice to implement a loss-less statedetection protocol with 20 times lower error than any other methods.
Download or read book Quantum Information and Quantum Computing written by Mikio Nakahara and published by World Scientific. This book was released on 2013 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: The open research center project "Interdisciplinary fundamental research toward realization of a quantum computer" has been supported by the Ministry of Education, Japan for five years. This is a collection of the research outcomes by the members engaged in the project. To make the presentation self-contained, it starts with an overview by Mikio Nakahara, which serves as a concise introduction to quantum information and quantum computing. Subsequent contributions include subjects from physics, chemistry, mathematics, and information science, reflecting upon the wide variety of scientists working under this project. These contributions introduce NMR quantum computing and related techniques, number theory and coding theory, quantum error correction, photosynthesis, non-classical correlations and entanglement, neutral atom quantum computer, among others. Each of the contributions will serve as a short introduction to these cutting edge research fields.
Download or read book Quantum Computing written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2019-04-27 with total page 273 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum mechanics, the subfield of physics that describes the behavior of very small (quantum) particles, provides the basis for a new paradigm of computing. First proposed in the 1980s as a way to improve computational modeling of quantum systems, the field of quantum computing has recently garnered significant attention due to progress in building small-scale devices. However, significant technical advances will be required before a large-scale, practical quantum computer can be achieved. Quantum Computing: Progress and Prospects provides an introduction to the field, including the unique characteristics and constraints of the technology, and assesses the feasibility and implications of creating a functional quantum computer capable of addressing real-world problems. This report considers hardware and software requirements, quantum algorithms, drivers of advances in quantum computing and quantum devices, benchmarks associated with relevant use cases, the time and resources required, and how to assess the probability of success.
Download or read book Neutral Atom Quantum Computing with Rydberg Blockade written by Line Hjortshøj Pedersen and published by . This book was released on 2008 with total page 119 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Neutral Atom Adiabatic Quantum Computing written by and published by . This book was released on 2013 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Controlling the Quantum World written by National Research Council and published by National Academies Press. This book was released on 2007-06-21 with total page 245 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of the Physics 2010 decadal survey project, the Department of Energy and the National Science Foundation requested that the National Research Council assess the opportunities, over roughly the next decade, in atomic, molecular, and optical (AMO) science and technology. In particular, the National Research Council was asked to cover the state of AMO science, emphasizing recent accomplishments and identifying new and compelling scientific questions. Controlling the Quantum World, discusses both the roles and challenges for AMO science in instrumentation; scientific research near absolute zero; development of extremely intense x-ray and laser sources; exploration and control of molecular processes; photonics at the nanoscale level; and development of quantum information technology. This book also offers an assessment of and recommendations about critical issues concerning maintaining U.S. leadership in AMO science and technology.
Download or read book A Neutral Atom Quantum Register written by Dominik Schrader and published by . This book was released on 2004 with total page 118 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Model Checking Quantum Systems written by Mingsheng Ying and published by Cambridge University Press. This book was released on 2021-02-04 with total page 223 pages. Available in PDF, EPUB and Kindle. Book excerpt: The first book introducing computer aided verification techniques for quantum systems with quantum computing and communication hardware.
Download or read book Quantum Logic With Cold Neutral Atoms written by and published by . This book was released on 2006 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: An experimental and theoretical study of neutral atom qubits for use in a quantum computing device was performed. Experimental achievements include loading and detection of single Rb87 atoms in optical traps, demonstration of fast (1.4 MHz) Rabi rotations between ground hyoperfine states, measurement of 1 ms T2 time using Ramsey interferometry, and observation of partial Rydberg blockade by two-photon excitation to levels with n=47.
Download or read book Proceedings of the XVIII International Conference on Atomic Physics written by Hossein R. Sadeghpour and published by World Scientific. This book was released on 2003 with total page 377 pages. Available in PDF, EPUB and Kindle. Book excerpt: This important proceedings volume highlights the major scientific achievement of the last decade in atomic physics, namely the creation of the gaseous Bose-Einstein condensate, which was featured prominently at the XVIII International Conference on Atomic Physics (ICAP2002). Two recipients of the 2001 Nobel Prize delivered lectures at the meeting. Among the topics discussed were novel processes leading to degenerate Fermi gases in atom traps, creation of cold molecules, condensates in optical lattices, atoms in intense fields, tests of fundamental symmetries, quantum control and information, time and frequency standards.
Download or read book Quantum Information in the Nanoelectronic World written by David K. Ferry and published by Springer Nature. This book was released on with total page 203 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Rewrite for Readability written by Tristan Behrens and published by BoD – Books on Demand. This book was released on 2024-04-23 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Rewrite for Readability" is a captivating memoir of 1 year in the life of the author, a multifaceted artist and technologist, that intertwines his personal journey with the evolving landscape of Artificial Intelligence. Born in a small German village in the 1980s, the author's life is a vivid tapestry of creativity and technological exploration. From his early days drawing fantastic beasts, inspired by the serene nature of the Harz Mountains, to his dynamic career spanning computer science, music composition, and AI, this book offers a unique perspective on the synergy of human creativity and machine intelligence. The author's narrative is deeply personal, recounting his upbringing in a quintessential German family, his transformative childhood and youth, and his academic pursuits. Professionally, the author has achieved a doctorate in Computer Science, with a focus on Artificial Intelligence, and has successfully published creative music influenced by computational methods. His philosophy is rooted in the power of learning and creativity to unlock human potential, a theme that resonates throughout his story. "Rewrite for Readability" is not just a memoir; it is a testament to the harmonious collaboration between human thought and AI. The author shares his experiences as an AI Music Artist in Residence and his involvement with the innovative ensemble Hexagon Machine, illustrating how AI has become an integral part of his creative process. The book is adorned with AI-generated images, complementing the narrative and inviting readers to engage their own imagination. This book is a must-read for anyone interested in the intersection of technology, creativity, and personal growth.
Download or read book Quantum Computing written by Mikio Nakahara and published by CRC Press. This book was released on 2008-03-11 with total page 439 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering both theory and progressive experiments, Quantum Computing: From Linear Algebra to Physical Realizations explains how and why superposition and entanglement provide the enormous computational power in quantum computing. This self-contained, classroom-tested book is divided into two sections, with the first devoted to the theoretical aspect
Download or read book Manipulating Quantum Systems written by National Academies of Sciences, Engineering, and Medicine and published by National Academies Press. This book was released on 2020-09-14 with total page 315 pages. Available in PDF, EPUB and Kindle. Book excerpt: The field of atomic, molecular, and optical (AMO) science underpins many technologies and continues to progress at an exciting pace for both scientific discoveries and technological innovations. AMO physics studies the fundamental building blocks of functioning matter to help advance the understanding of the universe. It is a foundational discipline within the physical sciences, relating to atoms and their constituents, to molecules, and to light at the quantum level. AMO physics combines fundamental research with practical application, coupling fundamental scientific discovery to rapidly evolving technological advances, innovation and commercialization. Due to the wide-reaching intellectual, societal, and economical impact of AMO, it is important to review recent advances and future opportunities in AMO physics. Manipulating Quantum Systems: An Assessment of Atomic, Molecular, and Optical Physics in the United States assesses opportunities in AMO science and technology over the coming decade. Key topics in this report include tools made of light; emerging phenomena from few- to many-body systems; the foundations of quantum information science and technologies; quantum dynamics in the time and frequency domains; precision and the nature of the universe, and the broader impact of AMO science.
