Coherent Manipulation of Rydberg Atoms Close to Surfaces at Cryogenic Temperatures PDF Download
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Author: Tobias Sebastian Thiele
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Tobias Sebastian Thiele
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
Author: T. Thiele
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Author: Juan Camilo Bohorquez (Ph.D.)
Publisher:
ISBN:
Category :
Languages : en
Pages : 0
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This thesis summarizes the hardware constructed for the Hybrid experiment, as well as the experimental progress made in Hybrid, to enable the construction of a Hybrid quantum system. This systems seeks to couple neutral atoms to high quality factor microwave cavities. Cavity QED systems, such as this one, are an integral part of atom-superconducting hybrid quantum computing. These systems are also promising candidates for transduction of quantum information from the microwave to the optical regime. Such transduction would enable the quantum networking of superconducting (SC) quantum registers at long distances. Rydberg atoms are uniquely suited to such cavity QED systems owing to the strong dipole moments of microwave-frequency Rydberg-Rydberg transitions, and the accessibility of optical transitions. Though the development of such systems is made challenging due to the significant dc polarizability of Rydberg states, and the size of electric field noise near surfaces. This thesis outlines the application of a microwave dressing scheme to a Rydberg system, and a demonstration of the reduction of polarizability said states by a factor of 7. In addition, we summarize modeling and analysis of the dressed-atom system, and how such a dressing scheme can be engineered to fully null the polarizability of a Rydberg state in one direction. We also summarize the limits of the dressing scheme, namely the anisotropy of the polarizability of the dressed Rydberg states, where in one direction the polarizability may be fully nulled, but in normal directions the polarizability is only reduced by 50[percent]. We also demonstrate and discuss the enhanced fourth-order, hyperpolarizability, of the dressed Rydberg states, and how even in relatively weak dc fields (~ 20 mV/cm) these effects can come to dominate the un-dressed polarizability. Through these drawbacks, coupled with a study of the published efforts to understand and mitigate electric field noise from surfaces, we conclude that a dressing scheme alone will be insufficient to enable high-fidelity Rydberg cavity QED demonstrations in our device on its own. Such efforts would require a greater atom-surface distance, as well as the implementation of significant dc surface field noise mitigation and compensation techniques, in conjunction with the dressing scheme proposed, to produce the required fidelity of atom-cavity interactions. This thesis then discusses the first demonstration of Rydberg Rabi excitations via a novel quadrupole-dipole two-photon excitation scheme. This scheme presents a significant reduction in the Doppler-shift induced dephasing in finite temperature atomic systems, due to the significantly reduced k-vector mismatch between the counter-propagating Rydberg fields. This thesis presents an analytical model for understanding the quadrupole excitation dynamics, as well as the two-photon Rabi dynamics of the driven system, in the adiabatic regime. This thesis also uses a tool to solve the master equation to evaluate the validity of the {adiabatic elimination} approximation in our system. We then uses those analytical and numerical tools to engineer the Rydberg laser polarizations, frequencies and powers for improved Rabi flopping fidelity. The analytical treatment is followed up with experimental date, demonstrating the Rydberg Rabi flopping between the ground state and $\ds 52P_{3/2},m_j=1/2$ Rydberg state. We supplement the experimental data, and analysis of it with a detailed accounting of the parameters of the Rydberg laser fields and noise sources which degrade the fidelity of the Rydberg Rabi operations, as measured {in situ}, or calibrated externally. Finally this thesis present a path forward for the Hybrid experiment, considering the challenges presented by surface electric field noise. The upgraded design for the experimental system makes use of a bulk microwave resonator, designed to require much greater atom-surface distances inside the atom-cavity interaction region. This device would enable atom-cavity interactions for cavity frequencies in the 5-7 GHz band, the native operating frequencies of existing SC quantum systems, while allowing the users to mitigate the size and effects of surface electric fields. We discuss the design considerations and current status of the new cavity design, as well as the design of the optical trapping, transport and readout techniques which will be used to localize and control the atoms inside the interaction region.
Author: R. F. Stebbings
Publisher: Cambridge University Press
ISBN: 052124823X
Category : Science
Languages : en
Pages : 528
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Book Description
After the development of the tunable laser, experimental studies in Rydberg states of atoms and molecules grew at a remarkable rate. Fundamental questions were resolved, opening doors for more experimental activity and theoretical inquiry. In this comprehensive summary of knowledge of Rydberg states, which was originally published in 1983, Professors Stebbings and Dunning brought together a select collection of experimental and theoretical discussions. Composed of works by the acknowledged leaders in the field, this volume will be of value for anyone with an interest in molecular physics.
Author: Antonella Karlson
Publisher:
ISBN:
Category : Computers
Languages : en
Pages : 252
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Book Description
"FET is the IST Programme nursery of novel and emerging scientific ideas. Its mission is to promote research that is of a long-term nature or involves particularly high risks, compensated by the potential of a significant societal or industrial impact. " -- ISTweb, Directorate F, Future and Emerging Technologies home page.
Author: Jakob Reichel
Publisher: John Wiley & Sons
ISBN: 3527643923
Category : Science
Languages : en
Pages : 412
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Book Description
This stimulating discussion of a rapidly developing field is divided into two parts. The first features tutorials in textbook style providing self-contained introductions to the various areas relevant to atom chip research. Part II contains research reviews that provide an integrated account of the current state in an active area of research where atom chips are employed, and explore possible routes of future progress. Depending on the subject, the length of the review and the relative weight of the 'review' and 'outlook' parts vary, since the authors include their own personal view and style in their accounts.
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 0309499542
Category : Science
Languages : en
Pages : 315
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Book Description
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.
Author: National Academies of Sciences, Engineering, and Medicine
Publisher: National Academies Press
ISBN: 030947969X
Category : Computers
Languages : en
Pages : 273
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Book Description
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.
Author: Harold J. Metcalf
Publisher: Springer Science & Business Media
ISBN: 146121470X
Category : Science
Languages : en
Pages : 329
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Book Description
Intended for advanced undergraduates and beginning graduates with some basic knowledge of optics and quantum mechanics, this text begins with a review of the relevant results of quantum mechanics, before turning to the electromagnetic interactions involved in slowing and trapping atoms and ions, in both magnetic and optical traps. The concluding chapters discuss a broad range of applications, from atomic clocks and studies of collision processes, to diffraction and interference of atomic beams at optical lattices and Bose-Einstein condensation.
Author: Roman Krems
Publisher: CRC Press
ISBN: 1420059041
Category : Science
Languages : en
Pages : 756
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Book Description
The First Book on Ultracold MoleculesCold molecules offer intriguing properties on which new operational principles can be based (e.g., quantum computing) or that may allow researchers to study a qualitatively new behavior of matter (e.g., Bose-Einstein condensates structured by the electric dipole interaction). This interdisciplinary book discusse
