Quantum computing with superconductors

Berggren, Karl K.

doi:10.1109/jproc.2004.833672

Cited by 29 publications

(11 citation statements)

References 92 publications

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“…The high sensitivity of SQUIDs allows them to be used in astronomy [27] and in geological [28] and medical applications [29]. SQUIDs also provide one of the more promising approaches to quantum computing [30,31]. A digital SQUID sensor based on a single-flux quantum with a large slew rate has been developed [32].…”

Section: Superconductor Magnetometersmentioning

confidence: 99%

Advances in magnetometry

Edelstein

2007

J. Phys.: Condens. Matter

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This article describes many of the advances in magnetometry. Because much of the recent progress in magnetometry is built on current technology, and to put these advances in the proper perspective, a general discussion of magnetometry will also be presented. The progress includes a remarkable increase in the magnetoresistance of some devices, improved signal processing, and some new types of magnetometer. The large increase in magnetoresistance is a result of an increased understanding of quantum mechanical spin dominated transport in restricted geometries such as multilayers and magnetic tunnel junctions. The new types of magnetometer include magnetoelectric sensors, extraordinary magnetoresistance sensors, and sensors that incorporate MEMS technology. These advances in magnetometer technology offer orders of magnitude increases in sensitivity and/or large decreases in cost and power consumption. Major technological limitations of current magnetic sensors are also discussed.

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Section: Superconductor Magnetometersmentioning

confidence: 99%

Advances in magnetometry

Edelstein

2007

J. Phys.: Condens. Matter

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“…Superconducting circuits incorporating Cooper-pair boxes have become a central paradigm for the study of many-body quantum dynamics, mesoscopic physics and solid-state quantum information processing. It is now possible to produce coherent superpositions of quantum states of such circuits, to observe coherent dynamics in them, and to perform readout with high fidelity and low backaction [68]. Open-loop control in superconducting circuits is thus reaching a level of maturity comparable to that of trapped ion systems, although the decoherence mechanisms are much less well understood and the achieved control fidelities have accordingly been substantially lower.…”

Section: Solid-state Systemsmentioning

confidence: 99%

Principles and applications of control in quantum systems

Mabuchi

Khaneja

2005

Intl J Robust & Nonlinear

153

122

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SUMMARYWe describe in this article some key themes that emerged during a Caltech/AFOSR Workshop on 'Principles and Applications of Control in Quantum Systems' (PRACQSYS), held 21-24 August 2004 at the California Institute of Technology. This workshop brought together engineers, physicists and applied mathematicians to construct an overview of new challenges that arise when applying constitutive methods of control theory to nanoscale systems whose behaviour is manifestly quantum. Its primary conclusions were that the number of experimentally accessible quantum control systems is steadily growing (with a variety of motivating applications), that appropriate formal perspectives enable straightforward application of the essential ideas of classical control to quantum systems, and that quantum control motivates extensive study of model classes that have previously received scant consideration.

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“…[ 10,11 ] Furthermore, spin chain systems can describe and be used to model a wide variety of different physical implementations. Examples include quantum dots, [ 3,12,13 ] trapped ions, [ 14 ] superconducting qubits, [ 15,16 ] and coupled optical waveguides. [ 17 ]…”

Section: Introductionmentioning

confidence: 99%

Unitary Design of Quantum Spin Networks for Robust Routing, Entanglement Generation, and Phase Sensing

D’Amico

Estarellas³

et al. 2022

Adv Quantum Tech

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Spin chains can be used to describe a wide range of platforms for quantum computation and quantum information. They enable the understanding, demonstration, and modeling of numerous useful phenomena, such as high fidelity transfer of quantum states, creation and distribution of entanglement, and creation of resources for measurement-based quantum processing. In this paper, a more complex spin system, a 2D spin network (SN) engineered by applying suitable unitaries to two uncoupled spin chains, is studied. Considering only the single-excitation subspace of the SN, it is demonstrated that the system can be operated as a router, directing information through the SN. It is also shown that it can serve to generate maximally entangled states between two sites. Furthermore, it is illustrated that this SN system can be used as a sensor device able to determine an unknown phase applied to a system spin. A detailed modeling investigation of the effects of static disorder in the system shows that this system is robust against different types of disorder.

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Quantum computing with superconductors

Cited by 29 publications

References 92 publications

Advances in magnetometry

Advances in magnetometry

Principles and applications of control in quantum systems

Unitary Design of Quantum Spin Networks for Robust Routing, Entanglement Generation, and Phase Sensing

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