Circuit Considerations In Traveling Wave Parametric Amplifiers
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Circuit Considerations In Traveling Wave Parametric Amplifiers
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Author : Stanford University. Stanford Electronics Laboratories
language : en
Publisher:
Release Date : 1959
Circuit Considerations In Traveling Wave Parametric Amplifiers written by Stanford University. Stanford Electronics Laboratories and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with categories.
Quantum Feedback And Traveling Wave Parametric Amplification In Superconducting Circuits
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Author : Christopher Stewart Macklin
language : en
Publisher:
Release Date : 2015
Quantum Feedback And Traveling Wave Parametric Amplification In Superconducting Circuits written by Christopher Stewart Macklin and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
Feedback control in classical systems is an indispensable, ubiquitous tool. The theoretical basis for achieving optimal classical control is well understood, and crucially relies on a very classical assumption: that measurements of the state of a system under control need not perturb that state. In a quantum context this assumption is fundamentally invalid. Although many aspects of the theory of quantum feedback control are relatively well developed, the technological basis for feedback control of a single quantum system has only very recently matured. We demonstrate the experimental realization of a quantum feedback control protocol, perpetually stabilizing the coherent Rabi oscillations of a superconducting qubit. This is the first utilization of quantum feedback control for stabilizing a dynamical process, and the first application of quantum feedback in a solid-state system of any kind. This demonstration comprises the first half of this thesis. The feedback protocol is predicated on the ability to make high-fidelity quantum measurements, which are enabled by quantum-limited Josephson parametric amplifiers (JPAs). The design and realization of the novel Josephson traveling-wave parametric amplifier (JTWPA) comprises the second half of this thesis. The JTWPA achieves order-of-magnitude improvements over state of the art JPAs in bandwidth and signal power handling while providing quantum-limited noise performance, potentially enabling the simultaneous readout of dozens of superconducting qubits and the generation of broadband multi-mode squeezing in the microwave domain.
A Study Of The Iterated Traveling Wave Parametric Amplifier
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Author : Charles Vester Bell
language : en
Publisher:
Release Date : 1959
A Study Of The Iterated Traveling Wave Parametric Amplifier written by Charles Vester Bell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1959 with Amplifiers, Vacuum-tube categories.
Study Of The Iterated Traveling Wave Parametric Amplifier
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Author : Stanford University. Stanford Electronics Laboratories
language : en
Publisher:
Release Date : 1960
Study Of The Iterated Traveling Wave Parametric Amplifier written by Stanford University. Stanford Electronics Laboratories and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1960 with categories.
Varactor Loaded Ladder Lines For Travelling Wave Parametric Amplifiers And Voltage Tunable Microwave Circuits
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Author : V. K. Tripathi
language : en
Publisher:
Release Date : 1968
Varactor Loaded Ladder Lines For Travelling Wave Parametric Amplifiers And Voltage Tunable Microwave Circuits written by V. K. Tripathi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with categories.
The purpose of the study is to investigate the properties of a varactor-loaded ladder-line structure for application as a traveling-wave parametric amplifier and voltage-tunable filter, delay line and phase shifter. In order to account for losses, and design appropriate coupling sections, an equivalent-circuit method is developed utilizing the Richards' frequency transformation to obtain the properties of coupled ladder-line structures. It is shown that the pass band of the structure, time delay, and phase shift per section can be tuned over a considerable range with proper circuit design. An experimental varactor-loaded ladder-line structure is discussed for X-band. Eight sections have been used to obtain a gain of more than 15 db over an instantaneous bandwidth of 300 MHz. The frequency band can be tuned over 1 GHz by varying the diode capacitance and the pump frequency. (Author).
Comprehensive Bibliography On Parametric Amplifiers
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Author : Benita Bulera Palluconi
language : en
Publisher:
Release Date : 1962
Comprehensive Bibliography On Parametric Amplifiers written by Benita Bulera Palluconi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1962 with Amplifiers (Electronics) categories.
External Circuit Traveling Wave Amplifiers
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Author : Stanford University Stanford Electronics Laboratories
language : en
Publisher:
Release Date : 1958
External Circuit Traveling Wave Amplifiers written by Stanford University Stanford Electronics Laboratories and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with categories.
Parametric Interaction In Josephson Junction Circuits And Transmission Lines
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Author : Hamid Reza Mohebbi
language : en
Publisher:
Release Date : 2011
Parametric Interaction In Josephson Junction Circuits And Transmission Lines written by Hamid Reza Mohebbi and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011 with categories.
This research investigates the realization of parametric amplification in superconducting circuits and structures where nonlinearity is provided by Josephson junction (JJ) elements. We aim to develop a systematic analysis over JJ-based devices toward design of novel traveling-wave Josephson parametric amplifiers (TW-JPA). Chapters of this thesis fall into three categories: lumped JPA, superconducting periodic structures and discrete Josephson transmission lines (DJTL). The unbiased Josephson junction (JJ) is a nonlinear element suitable for parametric amplification through a four-photon process. Two circuit topologies are introduced to capture the unique property of the JJ in order to efficiently mix signal, pump and idler signals for the purpose of signal amplification. Closed-form expressions are derived for gain characteristics, bandwidth determination, noise properties and impedance for this kind of parametric power amplifier. The concept of negative resistance in the gain formulation is observed. A design process is also introduced to find the regimes of operation for gain achievement. Two regimes of operation, oscillation and amplification, are highlighted and distinguished in the result section. Optimization of the circuits to enhance the bandwidth is also carried out. Moving toward TW-JPA, the second part is devoted to modelling the linear wave propagation in a periodic superconducting structure. We derive closed-form equations for dispersion and s-parameters of infinite and finite periodic structures, respectively. Band gap formation is highlighted and its potential applications in the design of passive filters and resonators are discussed. The superconducting structures are fabricated using YBCO and measured, illustrating a good correlation with the numerical results. A novel superconducting Transmission Line (TL), which is periodically loaded by Josephson junctions (JJ) and assisted by open stubs, is proposed as a platform to realize a traveling-wave parametric device. Using the TL model, this structure is modeled by a system of nonlinear partial differential equations (PDE) with a driving source and mixed-boundary conditions at the input and output terminals, respectively. This model successfully emulates parametric and nonlinear microwave propagation when long-wave approximation is applicable. The influence of dispersion to sustain three non-degenerate phased-locked waves through the TL is highlighted. A rigorous and robust Finite Difference Time Domain (FDTD) solver based on the explicit Lax-Wendroff and implicit Crank-Nicolson schemes has been developed to investigate the device responses under various excitations. Linearization of the wave equation, under small-amplitude assumption, dispersion and impedance analysis is performed to explore more aspects of the device for the purpose of efficient design of a traveling-wave parametric amplifier. Knowing all microwave characteristics and identifying different regimes of operation, which include impedance properties, cut-off propagation, dispersive behaviour and shock-wave formation, we exploit perturbation theory accompanied by the method of multiple scale to derive the three nonlinear coupled amplitude equations to describe the parametric interaction. A graphical technique is suggested to find three waves on the dispersion diagram satisfying the phase-matching conditions. Both cases of perfect phase-matching and slight mismatching are addressed in this work. The incorporation of two numerical techniques, spectral method in space and multistep Adams-Bashforth in time domain, is employed to monitor the unilateral gain, superior stability and bandwidth of this structure. Two types of functionality, mixing and amplification, with their requirements are described. These properties make this structure desirable for applications ranging from superconducting optoelectronics to dispersive readout of superconducting qubits where high sensitivity and ultra-low noise operation is required.
External Circuit Traveling Wave Amplifiers
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Author : Gregory Alfred Loew
language : en
Publisher:
Release Date : 1958
External Circuit Traveling Wave Amplifiers written by Gregory Alfred Loew and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with Amplifiers, Vacuum-tube categories.
Electron Devices Research Consolidated Quarterly Status Reports
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Author : Stanford University Stanford Electronics Laboratories
language : en
Publisher:
Release Date : 1958
Electron Devices Research Consolidated Quarterly Status Reports written by Stanford University Stanford Electronics Laboratories and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1958 with categories.