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Mon, 05/27/2013 - 12:30

  1. Susanne Butz, Physikalisches Institut, Karlsruhe Institute of Technology, Karlsruhe, Germany.
    • 12:30
    • D3-2040
    • Title: A Tunable Josephson Metamaterial

      Abstract: We present experimental data on a tunable magnetic metamaterial consisting of rf-SQUIDs. A metamaterial is a medium constructed of artifical elements, so- called meta-atoms, that interact in a specific way with an incoming electromagnetic wave. The size of and the distance between the individual meta-atoms is much smaller than the wavelength. Our metamaterial consists of one-dimensional arrays of 27 rf-SQUIDs, one chain placed inside each of the gaps of a coplanar waveguide. Due to the nonlinear inductance of the rf-SQUID, its resonance frequency is tunable in situ by applying a dc magnetic field. We demonstrate that this results in tunable effective parameters of our metamaterial. In order to obtain the effective magnetic permeability from the measured data, we employ a technique that uses only the complex transmission coefficient S21.

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Mon, 06/03/2013 - 12:30

  1. Bhaskar Roy Bardhan, Department of Physics and Astronomy, Louisiana State University
    • 12:30
    • D3-2040
    • To be annonced

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Wed, 06/05/2013 - 10:45

  1. INTRIQ : Lilian Childress, McGill
    • 10:45
    • D1-2165
    • Title: Spins and photons: toward quantum networks in diamond

      Abstract: Long-lived electronic and nuclear spin states have made nitrogen-vacancy (NV) defects in diamond a leading candidate for solid-state quantum information processing. Moreover, their coherent optical transitions open opportunities for quantum communication. This talk will consider the motivation and requirements for optically-networked quantum devices, and explore challenges and opportunities for realizing them in diamond. In particular, the resonant excitation and emission in these defect centers enables single shot spin detection as well as observation of two-photon quantum interference; these two capabilities have enabled measurement-based entanglement between remote NV centers.

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Mon, 06/10/2013 - 12:30

  1. Frank Verstraete , Université de Vienne
    • 12:30
    • D3-2040
    • To be announced

    • Voir Google Calendar

Tue, 06/11/2013 - 00:00

  1. Wolfgang Belzig, l'Université de Constance, Allemagne
    • Voir Google Calendar
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Villarreal R, Quirion G, Plumer ML, Poirier M, Usui T, Kimura T. Magnetic Phase Diagram of CuO via High-Resolution Ultrasonic Velocity Measurements. Physical Review Letters. 2012;109.
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Quirion G, Han X, Plumer ML, Poirier M. First order phase transition in the frustrated triangular antiferromagnet CsNiCl3. Physical Review Letters. 2006;97.
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Trudeau Y, Plumer ML, Poirier M, Takeuchi J. Ultrasonic study of the magnetic phase diagrams of CsNi0.98M0.02Cl3 (M=Co, Fe, Mg). Physical Review B. 1995;52:378-83.
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Poirier M, Beaudry R, Castonguay M, Plumer ML, Quirion G, Razavi FS, et al. Doping effects on the magnetic phase diagram of the spin-Peierls system CuGe1-xSixO3. Physical Review B. 1995;52:R6971-R6974.
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Trudeau Y, Plumer ML, Poirier M, Caillé A. Angular dependence of the H-T phase diagram of CsNiCl3. Physical Review B. 1993;48:12805-12.
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Poirier M, Castonguay M, Caillé A, Plumer ML, Gaulin BD. Ultrasonic study of quasi-one-dimensional magnetic system CsMnBr3. Physica B: Physics of Condensed Matter. 1990;165-166:171-2.
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Caillé A, Plumer ML, Poirier M, Gaulin BD. The angular dependence of the magnetic phase diagram of CsMnBr3. Physica B: Physics of Condensed Matter. 1990;165-166:169-70.
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Poirier M, Caillé A, Plumer ML. Ultrasonic study of crossover behavior near the chiral multicritical point of CsNiCl3. Physical Review B. 1990;41:4869-72.
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