6,069 research outputs found

    Some Post-Pliocene Buried Soils of Central United States

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    The Inland Empire in 2015

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    Presents projections for international and local migration, demographics, education, economic and employment conditions, and political participation for Southern California's Riverside and San Bernardino counties

    High-Fidelity Readout in Circuit Quantum Electrodynamics Using the Jaynes-Cummings Nonlinearity

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    We demonstrate a qubit readout scheme that exploits the Jaynes-Cummings nonlinearity of a superconducting cavity coupled to transmon qubits. We find that in the strongly-driven dispersive regime of this system, there is the unexpected onset of a high-transmission "bright" state at a critical power which depends sensitively on the initial qubit state. A simple and robust measurement protocol exploiting this effect achieves a single-shot fidelity of 87% using a conventional sample design and experimental setup, and at least 61% fidelity to joint correlations of three qubits.Comment: 5 pages, 4 figure

    Prospective Evaluation of Two Dosing Equations for Theophylline in Premature Infants

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    Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/90141/1/j.1875-9114.1996.tb02995.x.pd

    Ebola Virus Localization in the Macaque Reproductive Tract during Acute Ebola Virus Disease.

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    Sexual transmission of Ebola virus (EBOV) has been demonstrated more than a year after recovery from the acute phase of Ebola virus disease (EVD). The mechanisms underlying EBOV persistence and sexual transmission are not currently understood. Using the acute macaque model of EVD, we hypothesized EBOV would infect the reproductive tissues and sought to localize the infection in these tissues using immunohistochemistry and transmission electron microscopy. In four female and eight male macaques that succumbed to EVD between 6 and 9 days after EBOV challenge, we demonstrate widespread EBOV infection of the interstitial tissues and endothelium in the ovary, uterus, testis, seminal vesicle, epididymis, and prostate gland, with minimal associated tissue immune response or organ pathology. Given the widespread involvement of EBOV in the reproductive tracts of both male and female macaques, it is reasonable to surmise that our understanding of the mechanisms underlying sexual transmission of EVD and persistence of EBOV in immune-privileged sites would be facilitated by the development of a nonhuman primate model in which the macaques survived past the acute stage into convalescence

    A proposal for implementing an n-qubit controlled-rotation gate with three-level superconducting qubit systems in cavity QED

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    We present a way for implementing an n-qubit controlled-rotation gate with three-level superconducting qubit systems in cavity QED. The two logical states of a qubit are represented by the two lowest levels of each system while a higher-energy level is used for the gate implementation. The method operates essentially by preparing a WW state conditioned on the states of the control qubits, creating a single photon in the cavity mode, and then performing an arbitrary rotation on the states of the target qubit with assistance of the cavity photon. It is interesting to note that the basic operational steps for implementing the proposed gate do not increase with the number nn of qubits, and the gate operation time decreases as the number of qubits increases. This proposal is quite general, which can be applied to various types of superconducting devices in a cavity or coupled to a resonator.Comment: Six figures, accepted by Journal of Physics: Condensed Matte

    Measurements of Quasiparticle Tunneling Dynamics in a Bandgap-Engineered Transmon Qubit

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    We have engineered the bandgap profile of transmon qubits by combining oxygen-doped Al for tunnel junction electrodes and clean Al as quasiparticle traps to investigate energy relaxation due to quasiparticle tunneling. The relaxation time T1T_1 of the qubits is shown to be insensitive to this bandgap engineering. Operating at relatively low EJ/ECE_J/E_C makes the transmon transition frequency distinctly dependent on the charge parity, allowing us to detect the quasiparticles tunneling across the qubit junction. Quasiparticle kinetics have been studied by monitoring the frequency switching due to even/odd parity change in real time. It shows the switching time is faster than 10 μ\mus, indicating quasiparticle-induced relaxation has to be reduced to achieve T1T_1 much longer than 100 μ\mus.Comment: 11 pages, 8 figure

    Linear vs. nonlinear effects for nonlinear Schrodinger equations with potential

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    We review some recent results on nonlinear Schrodinger equations with potential, with emphasis on the case where the potential is a second order polynomial, for which the interaction between the linear dynamics caused by the potential, and the nonlinear effects, can be described quite precisely. This includes semi-classical regimes, as well as finite time blow-up and scattering issues. We present the tools used for these problems, as well as their limitations, and outline the arguments of the proofs.Comment: 20 pages; survey of previous result

    The Effects of Acute Thermoneutral and Hot Water Immersion on Cerebrovascular Reactivity

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