Department of Physics | Université de Sherbrooke

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Tue, 05/21/2013 - 12:30

Gabriel Poulin-Lamarre
- 12:30
- D3-2040
- To be announced
- Voir Google Calendar

Mon, 05/27/2013 - 12:30

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.
- Voir Google Calendar

Mon, 06/03/2013 - 12:30

Bhaskar Roy Bardhan, Department of Physics and Astronomy, Louisiana State University
- 12:30
- D3-2040
- To be annonced
- Voir Google Calendar

Wed, 06/05/2013 - 10:45

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.
- Voir Google Calendar

Mon, 06/10/2013 - 12:30

Frank Verstraete , Université de Vienne
- 12:30
- D3-2040
- To be announced
- Voir Google Calendar

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.

Quirion G, Han X, Plumer ML, Poirier M. First order phase transition in the frustrated triangular antiferromagnet CsNiCl3. Physical Review Letters. 2006;97.

Quirion G, Taylor T, Poirier M. Landau model for the elastic properties of the quasi-one-dimensional antiferromagnetic compound CsNiCl3. Physical Review B. 2005;72:1-7.

Quirion G, Razavi FS, Dumoulin B, Poirier M, Revcolevschi A, Dhalenne G. Ultrasonic study of the spin-Peierls system CuGeO3 under pressure. Physical Review B. 1998;58:882-6.

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.

Quirion G, Bourbonnais C, Barthel E, Auban P, Wzietek P, Jerome D, et al. NMR spectroscopy in K3C60 as a function of temperature and pressure. Synthetic Metals. 1993;56:3154-9.

Achkir D, Poirier M, Bourbonnais C, Quirion G, Lenoir C, Batail P, et al. Microwave surface impedance of κ-(BEDT-TTF)2Cu(NCS)2, where BEDT-TTF is bis(ethylenedithio)tetrathiafulvalene: Evidence for unconventional superconductivity. Physical Review B. 1993;47:11595-8.

Achkir D, Poirier M, Bourbonnais C, Quirion G, Batail P, Lenoir C, et al. Anisotropic flux flow studied by microwave surface impedance measurements in the organic superconductors κ-(BEDT-TTF)2Cu(NCS)2. Synthetic Metals. 1993;56:2917-22.

Quirion G, Poirier M, Liou KK, Hoffman BM. Local moment scattering in the one-dimensional molecular conductors CuxNi1-x (Phthalocyaninato) I. Synthetic Metals. 1991;42:2653-7.

Quirion G, Poirier M, Liou KK, Hoffman BM. Strong carrier scattering by a Cu2+ local moment array in one-dimensional molecular conductors CuxNi1-x(phthalocyaninato)I. Physical Review B. 1991;43:860-4.

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