Quantum information processing using quantum dot spins and cavity QED
Atac Imamoglu,David D. Awschalom,Guido Burkard,David P. DiVincenzo,Daniel Loss,Mark S. Sherwin,Alex Small +6 more
TLDR
In this paper, a scheme that realizes controlled interactions between two distant quantum dot spins is proposed, where the effective long-range interaction is mediated by the vacuum field of a high finesse microcavity.Abstract:
The electronic spin degrees of freedom in semiconductors typically have decoherence times that are several orders of magnitude longer than other relevant time scales. A solid-state quantum computer based on localized electron spins as qubits is therefore of potential interest. Here, a scheme that realizes controlled interactions between two distant quantum dot spins is proposed. The effective long-range interaction is mediated by the vacuum field of a high finesse microcavity. By using conduction-band-hole Raman transitions induced by classical laser fields and the cavity-mode, parallel controlled-not operations, and arbitrary single qubit rotations can be realized.read more
Citations
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Superconductivity at 39 K in magnesium diboride
TL;DR: In this article, the authors reported the discovery of bulk superconductivity in magnesium diboride, MgB2, with a transition temperature of 39'K, which they believe to be the highest yet determined for a non-copper-oxide bulk superconductor.
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Spins in few-electron quantum dots
TL;DR: In this article, the physics of spins in quantum dots containing one or two electrons, from an experimentalist's viewpoint, are described, and various methods for extracting spin properties from experiment are presented, restricted exclusively to electrical measurements.
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Quantum-state engineering with Josephson-junction devices
TL;DR: In this article, the authors review the properties of low-capacitance Josephson tunneling junctions and the practical and fundamental obstacles to their use for quantum information processing and describe how the basic physical manipulations on an ideal device can be combined to perform useful operations.
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Strong coupling in a single quantum dot–semiconductor microcavity system
Johann Peter Reithmaier,G. Sek,G. Sek,Andreas Löffler,C. Hofmann,S. Kuhn,Stephan Reitzenstein,L. V. Keldysh,V. D. Kulakovskii,T. L. Reinecke,Alfred Forchel +10 more
TL;DR: The observation of strong coupling of a single two-level solid-state system with a photon, as realized by a single quantum dot in a semiconductor microcavity, may provide a basis for future applications in quantum information processing or schemes for coherent control.
Journal ArticleDOI
Quantum nature of a strongly coupled single quantum dot–cavity system
K. Hennessy,Antonio Badolato,Martin Winger,Dario Gerace,Mete Atatüre,S. Gulde,Stefan Fält,Evelyn L. Hu,Atac Imamoglu +8 more
TL;DR: Observations unequivocally show that quantum information tasks are achievable in solid-state cavity QED by observing quantum correlations in photoluminescence from a photonic crystal nanocavity interacting with one, and only one, quantum dot located precisely at the cavity electric field maximum.
References
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Introduction to solid-state theory
TL;DR: In this paper, the Schrodinger Equation for Electrons in a Periodic Potential (PE) was used to approximate the Hartree-Fock Approximation for the Electron Gas.
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