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 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 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 Advancing Neutral Atom Quantum Computing written by and published by . This book was released on 2005 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Abstract: In this work we present the results of studies of one-dimensional (1D) and two-dimensional (2D) optical lattices on a chip. We have developed a method to create 1D and 2D optical lattices above an optical waveguide. The method is based on the destructive interference of the evanescent waves of two modes of the waveguide, resulting in a periodic array of nodes above the waveguide surface. For blue-detuned light, this constitutes an array of optical dipole traps for neutral atoms. One pair of modes coupled into a ridge waveguide creates a 1D array of nodes in this manner, and two orthogonal pairs of modes in a slab waveguide result in a 2D array of nodes. Computational analysis of our method showed that these optical atom chips may be suitable for use as a quantum register, and for studies of atom-surface interactions between the trapped atoms and the waveguide surface. Using realistic waveguide materials and laboratory laser parameters we found that for a laser power of [approx.]100 mW nodes can be created [approx.]100 nm above the waveguide surface. The nodes constitute atom traps that are [approx.]1mK deep, and have trap frequencies [approx.]1MHz and ground state sizes of [approx.]10 nm. The spacing between traps is [approx.]1 um enabling individual addressing with a focused laser beam. With the implementation of two-qubit gates in mind, initial investigations of extensions of the basic 2D optical lattice were conducted. Computational results for a counter-propagating 2D optical lattice with very close trap spacing ([approx.][lambda]/4) in one dimension, and for a 2D optical lattice with adjustable spacing between pairs of traps in one dimension are presented. An experimental setup for the realization of the proposed 2D optical lattices on a chip was designed and built. Several cooling and trapping steps necessary to prepare a cold atom sample for loading of the 2D optical lattice have been implemented successfully. In the course of previous studies of atom-surface interactions, a novel surface-ionization detector for 2D imaging of neutral atom samples was built and characterized. We find a detection efficiency [approx.]50 %, a spatial resolution of 20 um and a time response
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 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 Devices written by Goong Chen and published by CRC Press. This book was released on 2006-09-18 with total page 565 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the first books to thoroughly examine the subject, Quantum Computing Devices: Principles, Designs, and Analysis covers the essential components in the design of a "real" quantum computer. It explores contemporary and important aspects of quantum computation, particularly focusing on the role of quantum electronic devices as quantum gates.
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 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 Ultra Fast Diffractive Optical Micro Trap Arrays for Neutral Atom Quantum Computing written by and published by . This book was released on 2012 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conflictos constitucionales de las Comunidades Aut nomas written by España. Tribunal Constitucional and published by . This book was released on 1990 with total page 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 Adiabatic Quantum Computing with Neutral Atoms written by and published by . This book was released on 2012 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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.
Download or read book Quantum Computing An Applied Approach written by Jack D. Hidary and published by Springer Nature. This book was released on 2021-09-29 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book integrates the foundations of quantum computing with a hands-on coding approach to this emerging field; it is the first to bring these elements together in an updated manner. This work is suitable for both academic coursework and corporate technical training. The second edition includes extensive updates and revisions, both to textual content and to the code. Sections have been added on quantum machine learning, quantum error correction, Dirac notation and more. This new edition benefits from the input of the many faculty, students, corporate engineering teams, and independent readers who have used the first edition. This volume comprises three books under one cover: Part I outlines the necessary foundations of quantum computing and quantum circuits. Part II walks through the canon of quantum computing algorithms and provides code on a range of quantum computing methods in current use. Part III covers the mathematical toolkit required to master quantum computing. Additional resources include a table of operators and circuit elements and a companion GitHub site providing code and updates. Jack D. Hidary is a research scientist in quantum computing and in AI at Alphabet X, formerly Google X.
Download or read book Hardware for Quantum Computing written by Chuck Easttom and published by Springer Nature. This book was released on with total page 188 pages. Available in PDF, EPUB and Kindle. Book excerpt:
