Département de physique | Université de Sherbrooke

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Prochains séminaires

Demain

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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lun, 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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mer, 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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lun, 06/10/2013 - 12:30

Frank Verstraete , Université de Vienne
- 12:30
- D3-2040
- To be announced
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mar, 06/11/2013 - 00:00

Wolfgang Belzig, l'Université de Constance, Allemagne
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Ghamlouch H, Aubin M, Gagnon R, Taillefer L. Vortex movements parallel and perpendicular to twin boundaries seen through the Nernst and Seebeck effects of YBa2Cu3O7-δ. Physica C: Superconductivity and its Applications. 1997;275:141-5.

Ghamlouch H, Aubin M, Gagnon R, Taillefer L. Observation of vortex-lattice melting in YBa2Cu3O7-δ by Seebeck-effect measurements. Physical Review B. 1996;54:9070-3.

Dufour P, Jandl S, Banville M, Fournier P, Aubin M. Infrared reflectance of YBa2(Cu1-xFex)3O7-u. Physica C: Superconductivity and its applications. 1990;166:431-6.

Gagnon R, Jandl S, Aubin M. The effect of chemical disorder on the gap of HfxZr 1-xS3 solid solutions. Journal of Physics: Condensed Matter. 1989;1:1329-37.

Gagnon R, Bernier G, Jandl S, Aubin M. Back reflection effect at the fundamental edge of semiconductors in modulated reflectivity measurements. Solid State Communications. 1987;64:361-5.

Amara A, Frongillo Y, Aubin M, Jandl S, Lopez-Castillo JM, Jay-Gerin J-. Thermoelectric power of TiS2. Physical Review B. 1987;36:6415-9.

Lopez-Castillo J-, Amara A, Jandl S, Jay-Gerin J-, Ayache C, Aubin M. Phonon-drag effect in TiSe2-xSx mixed compounds. Physical Review B. 1987;36:4249-53.

Houde D, Jandl S, Banville M, Aubin M. The infrared spectrum of Cd3As2. Solid State Communications. 1986;57:247-8.

Frongillo Y, Aubin M, Jandl S. SEEBECK COEFFICIENT OF QUASI-TWO-DIMENSIONAL SnS//xSe//2// minus //x CRYSTALS. Canadian journal of physics. 1985;63:1405-8.

Ikari T, Jandl S, Aubin M, Truong KD. Electrical properties and phase transitions of trimethylammonium-iodine- tetracyanoquinodimethane (TMA-I-TCNQ). Physical Review B. 1983;28:3859-63.

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