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
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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.
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Mon, 06/10/2013 - 12:30

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

Jandl S, Mansouri S, Mukhin AA, Yu Ivanov V, Balbashov A, Gospodino MM, et al. Study of crystal-field excitations and Raman active phonons in o-DyMnO 3. Journal of Magnetism and Magnetic Materials. 2011;323:1104-8.

Vermette J, Jandl S, Mukhin AA, Ivanov VY, Balbashov A, Gospodinov MM, et al. Raman study of the antiferromagnetic phase transitions in hexagonal YMnCO3and LuMnO3. Journal of Physics Condensed Matter. 2010;22.

Mansouri S, Charpentier S, Jandl S, Fournier P, Mukhin AA, Ivanov YV, et al. A micro-Raman study of a Pr0.5Ca0.5MnO3 single crystal and thin films. Journal of Physics: Condensed Matter. 2009;21:386004 (6pp). Abstract

Jandl S, Mukhin AA, Yu Ivanov V, Balbashov A, Orlita M. Nd3+ crystal-field study of weakly doped Nd1-xCaxMnO3. Journal of Magnetism and Magnetic Materials. 2009;321:3607-10.

Mansouri S, Charpentier S, Jandl S, Fournier P, Mukhin AA, Ivanov VY, et al. A micro-Raman study of a Pr0.5Ca0.5MnO3 single crystal and thinfilms. Journal of Physics Condensed Matter. 2009;21.

Jandl S, Mukhin AA, Ivanov VY, Balbashov A. Micro-Raman and magnetization studies of Nd1-xCa xMnO3 phase transitions. Journal of Physics: Conference Series. 2007;92.

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