Download or read book Quantum Limits on Measurement and Control of a Mechanical Oscillator written by Vivishek Sudhir and published by Springer. This book was released on 2017-11-21 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis reports on experiments in which the motion of a mechanical oscillator is measured with unprecedented precision. The position fluctuations of the oscillator—a glass nanostring—are measured with an imprecision that is sufficient to resolve its quantum zero-point motion within its thermal decoherence time. The concomitant observation of measurement back-action, in accordance with Heisenberg’s uncertainty principle, verifies the principles of linear quantum measurements on a macroscopic mechanical object. The record of the measurement is used to perform feedback control so as to suppress both classical thermal motion and quantum measurement back-action. These results verify some of the central and long-standing predictions of quantum measurement theory applied to a macroscopic object. The act of measurement not only perturbs the subject of the measurement—the mechanical oscillator—but also changes the state of the light used to make the measurement. This prediction is verified by demonstrating that the optical field, after having interacted with the mechanical oscillator, contains quantum correlations that render its quadrature fluctuations smaller than those of the vacuum – i.e., the light is squeezed. Lastly, the thesis reports on some of the first feedback control experiments involving macroscopic objects in the quantum regime, together with an exploration of the quantum limit of feedback control. The book offers a pedagogical account of linear measurement theory, its realization via optical interferometry, and contains a detailed guide to precision optical interferometry..
Download or read book Quantum Measurement written by Vladimir B. Braginsky and published by Cambridge University Press. This book was released on 1995-05-25 with total page 216 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an up-to-date introduction to the quantum theory of measurement. Although the main principles of the field were elaborated in the 1930s by Bohr, Schrödinger, Heisenberg, von Neuman, and Mandelstam, it was not until the 1980s that technology became sufficiently advanced to allow its application in real experiments. Quantum measurement is now central to many ultra-high technology developments, such as "squeezed light," single atom traps, and searches for gravitational radiation. It is also considered to have great promise for computer science and engineering, particularly for its applications in information processing and transfer. The book begins with a brief introduction to the relevant theory and goes on to discuss all aspects of the design of practical quantum measurement systems.
Download or read book Quantum Machines Measurement and Control of Engineered Quantum Systems written by Michel Devoret and published by OUP Oxford. This book was released on 2014-06-12 with total page 624 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book gathers the lecture notes of courses given at the 2011 summer school in theoretical physics in Les Houches, France, Session XCVI. What is a quantum machine? Can we say that lasers and transistors are quantum machines? After all, physicists advertise these devices as the two main spin-offs of the understanding of quantum mechanical phenomena. However, while quantum mechanics must be used to predict the wavelength of a laser and the operation voltage of a transistor, it does not intervene at the level of the signals processed by these systems. Signals involve macroscopic collective variables like voltages and currents in a circuit or the amplitude of the oscillating electric field in an electromagnetic cavity resonator. In a true quantum machine, the signal collective variables, which both inform the outside on the state of the machine and receive controlling instructions, must themselves be treated as quantum operators, just as the position of the electron in a hydrogen atom. Quantum superconducting circuits, quantum dots, and quantum nanomechanical resonators satisfy the definition of quantum machines. These mesoscopic systems exhibit a few collective dynamical variables, whose fluctuations are well in the quantum regime and whose measurement is essentially limited in precision by the Heisenberg uncertainty principle. Other engineered quantum systems based on natural, rather than artificial degrees of freedom can also qualify as quantum machines: trapped ions, single Rydberg atoms in superconducting cavities, and lattices of ultracold atoms. This book provides the basic knowledge needed to understand and investigate the physics of these novel systems.
Download or read book Fluctuating Nonlinear Oscillators written by Mark Dykman and published by Oxford University Press. This book was released on 2012-07-26 with total page 446 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book provides a unifying insight into a broad range of phenomena displayed by vibrational systems of current interest. The chapters complement each other to give an account of the major fundamental results and applications in quantum information, condensed matter physics, and engineering.
Download or read book Quantum Measurement and Control written by Howard M. Wiseman and published by Cambridge University Press. This book was released on 2010 with total page 477 pages. Available in PDF, EPUB and Kindle. Book excerpt: Modern quantum measurement for graduate students and researchers in quantum information, quantum metrology, quantum control and related fields.
Download or read book Quantum Optomechanics written by Warwick P. Bowen and published by CRC Press. This book was released on 2015-11-18 with total page 375 pages. Available in PDF, EPUB and Kindle. Book excerpt: Written by leading experimentalist Warwick P. Bowen and prominent theoretician Gerard J. Milburn, Quantum Optomechanics discusses modern developments in this novel field from experimental and theoretical standpoints. The authors share their insight on a range of important topics, including optomechanical cooling and entanglement; quantum limits on
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Quantum Optomechanics and Nanomechanics written by Pierre-Francois Cohadon and published by Oxford University Press, USA. This book was released on 2020-02-20 with total page 475 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Les Houches Summer School in August 2015 covered the emerging fields of cavity optomechanics and quantum nanomechanics. Optomechanics is flourishing and its concepts and techniques are now applied to a wide range of topics. Modern quantum optomechanics was born in the late 1970s in the framework of gravitational wave interferometry, with an initial focus on the quantum limits of displacement measurements. Carlton Caves, Vladimir Braginsky, and others realized that the sensitivity of the anticipated large-scale gravitational-wave interferometers (GWI) was fundamentally limited by the quantum fluctuations of the measurement laser beam. After tremendous experimental progress, the sensitivity of the upcoming next generation of GWI will effectively be limited by quantum noise. In this way, quantum-optomechanical effects will directly affect the operation of what is arguably the world's most impressive precision experiment. However, optomechanics has also gained a life of its own with a focus on the quantum aspects of moving mirrors. Laser light can be used to cool mechanical resonators well below the temperature of its environment. After proof-of-principle demonstrations of this cooling in 2006, a number of systems were used as the field gradually merged with its condensed matter cousin (nanomechanical systems) to try to reach the mechanical quantum ground state, eventually demonstrated in 2010 by pure cryogenic techniques and just one year later by a combination of cryogenic and radiation-pressure cooling. The book covers all aspects -- historical, theoretical, experimental -- of the field, with its applications to quantum measurement, foundations of quantum mechanics and quantum information. It is an essential read for any new researcher in the field.
Download or read book Quantum Opto Mechanics with Micromirrors written by Simon Gröblacher and published by Springer Science & Business Media. This book was released on 2012-12-16 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt: Quantum effects in macroscopic systems have long been a fascination for researchers. Over the past decade mechanical oscillators have emerged as a leading system of choice for many such experiments. The work reported in this thesis investigates the effects of the radiation-pressure force of light on macroscopic mechanical structures. The basic system studied is a mechanical oscillator that is highly reflective and part of an optical resonator. It interacts with the optical cavity mode via the radiation-pressure force. Both the dynamics of the mechanical oscillation and the properties of the light field are modified through this interaction. The experiments use quantum optical tools (such as homodyning and down-conversion) with the goal of ultimately showing quantum behavior of the mechanical center of mass motion. Of particular value are the detailed descriptions of several novel experiments that pave the way towards this goal and are already shaping the field of quantum optomechanics, in particular optomechanical laser cooling and strong optomechanical coupling.
Download or read book Publications of the National Institute of Standards and Technology Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1983 with total page 442 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Progress in Optics written by Taco Visser and published by Academic Press. This book was released on 2016-04-08 with total page 422 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Progress in Optics series contains more than 300 review articles by distinguished research workers, which have become permanent records for many important developments, helping optical scientists and optical engineers stay abreast of their fields. Comprehensive, in-depth reviews Edited by the leading authority in the field
Download or read book Quantum Measurement Theory and its Applications written by Kurt Jacobs and published by Cambridge University Press. This book was released on 2014-08-14 with total page 729 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent experimental advances in the control of quantum superconducting circuits, nano-mechanical resonators and photonic crystals has meant that quantum measurement theory is now an indispensable part of the modelling and design of experimental technologies. This book, aimed at graduate students and researchers in physics, gives a thorough introduction to the basic theory of quantum measurement and many of its important modern applications. Measurement and control is explicitly treated in superconducting circuits and optical and opto-mechanical systems, and methods for deriving the Hamiltonians of superconducting circuits are introduced in detail. Further applications covered include feedback control, metrology, open systems and thermal environments, Maxwell's demon, and the quantum-to-classical transition.
Download or read book Continuous Quantum Measurements and Path Integrals written by M.B Mensky and published by CRC Press. This book was released on 1993-01-01 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: Advances in technology are taking the accuracy of macroscopic as well as microscopic measurements close to the quantum limit, for example, in the attempts to detect gravitational waves. Interest in continuous quantum measurements has therefore grown considerably in recent years. Continuous Quantum Measurements and Path Integrals examines these measurements using Feynman path integrals. The path integral theory is developed to provide formulae for concrete physical effects. The main conclusion drawn from the theory is that an uncertainty principle exists for processes, in addition to the familiar one for states. This implies that a continuous measurement has an optimal accuracy-a balance between inefficient error and large quantum fluctuations (quantum noise). A well-known expert in the field, the author concentrates on the physical and conceptual side of the subject rather than the mathematical.
Download or read book Coherent State Limit of Cavity Vibrations In Analog To Quantum Acoustics written by professor ibrahim elnoshokaty and published by ibrahim elnoshokaty. This book was released on with total page 429 pages. Available in PDF, EPUB and Kindle. Book excerpt: The book describes the author's research on the quantum behavior of mechanical oscillators in the form of surface acoustic waves (SAWs). The text provides a historical perspective on the use of mechanical oscillators in technological advancements, from pendulum clocks to the development of quantum technologies. The author highlights the unique advantages of SAW systems in the development of quantum technologies and the lessons that can be learned from this particular platform. The text also discusses the potential applications of SAW systems in the development of quantum technologies. The author emphasizes the importance of understanding the quantum behavior of mechanical systems and the potential for these systems to drive scientific advancement. The text discusses the quantum behavior of mechanical oscillators in the form of surface acoustic waves (SAWs) and their potential applications in quantum technologies. The author highlights the unique advantages of SAW systems and the lessons that can be learned from this platform. The text also discusses the history of mechanical oscillators in technological advancements, from pendulum clocks to the development of quantum technologies.The given input text describes the author's research on the quantum behavior of mechanical oscillators in the form of surface acoustic waves (SAWs). The text provides a historical perspective on the use of mechanical oscillators in technological advancements, from pendulum clocks to the development of quantum technologies. The author highlights the unique advantages of SAW systems in the development of quantum technologies and the lessons that can be learned from this particular platform. The text also discusses the potential applications of SAW systems in the development of quantum technologies. The author emphasizes the importance of understanding the quantum behavior of mechanical systems and the potential for these systems to drive scientific advancement. The input text describes the author's research on the quantum behavior of mechanical oscillators in the form of surface acoustic waves (SAWs). The text provides a historical perspective on the use of mechanical oscillators in technological advancements, from pendulum clocks to the development of quantum technologies. The author highlights the unique advantages of SAW systems in the development of quantum technologies and the lessons that can be learned from this platform. The text also discusses the potential applications of SAW systems in the development of quantum technologies. The author emphasizes the importance of understanding the quantum behavior of mechanical systems and the potential for these systems to drive scientific advancement. Research Highlights: * Quantum acoustics behavior of mechanical oscillators in SAWs discussed * Historical perspective on mechanical oscillators in technological advancements * Potential applications of SAW systems in quantum acoustics a technologies discussed * Importance of understanding quantum behavior of mechanical systems emphasized Key word Acoustic wave, Surface acoustic wave, SAW, Mechanical oscillator, Quantum mechanics, Quantum technology
Download or read book Frequency Measurement and Control written by Andre N. Luiten and published by Springer Science & Business Media. This book was released on 2003-07-01 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text on precision frequency measurement and its key enabling techniques includes reviews written by some of the most experienced researchers in their respective fields. This text should prove useful to researchers just entering the field of frequency metrology and standards, or equally well to the experienced practitioner.
Download or read book Linear Dynamical Quantum Systems written by Hendra I Nurdin and published by Springer. This book was released on 2017-05-11 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt: This monograph provides an in-depth treatment of the class of linear-dynamical quantum systems. The monograph presents a detailed account of the mathematical modeling of these systems using linear algebra and quantum stochastic calculus as the main tools for a treatment that emphasizes a system-theoretic point of view and the control-theoretic formulations of quantum versions of familiar problems from the classical (non-quantum) setting, including estimation and filtering, realization theory, and feedback control. Both measurement-based feedback control (i.e., feedback control by a classical system involving a continuous-time measurement process) and coherent feedback control (i.e., feedback control by another quantum system without the intervention of any measurements in the feedback loop) are treated. Researchers and graduates studying systems and control theory, quantum probability and stochastics or stochastic control whether from backgrounds in mechanical or electrical engineering or applied mathematics will find this book to be a valuable treatment of the control of an important class of quantum systems. The material presented here will also interest physicists working in optics, quantum optics, quantum information theory and other quantum-physical disciplines.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 440 pages. Available in PDF, EPUB and Kindle. Book excerpt:
