Department of Physics | Université de Sherbrooke

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Upcoming events

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

Shakeripour H, Petrovic C, Taillefer L. Heat transport as a probe of superconducting gap structure. New Journal of Physics. 2009;11.

Li SY, Bonnemaison J-, Payeur A, Fournier P, Wang CH, Chen XH, et al. Reply to comment on {``Low-temperature phonon thermal conductivity of single-crystalline Nd$_2$CuO$_4$: Effects of sample size and surface roughness''}. Physical Review B. 2009;79.

Doiron-Leyraud N, Auban-Senzier P, René de Cotret S, Bechgaard K, Jérome D, Taillefer L. Towards a consistent picture for quasi-1D organic superconductors. Physica B: Condensed Matter. 2009.

Luo XG, Tanatar MA, Reid J-, Shakeripour H, Doiron-Leyraud N, Ni N, et al. Quasiparticle heat transport in single-crystalline Ba1-x K x Fe2 As2: Evidence for a k -dependent superconducting gap without nodes. Physical Review B. 2009;80.

Cyr-Choinière O, Daou R, Laliberté F, Le Boeuf D, Doiron-Leyraud N, Chang J, et al. Enhancement of the Nernst effect by stripe order in a high-T c superconductor. Nature. 2009;458:743-5.

Jaudet C, Levallois J, Audouard A, Vignolles D, Vignolle B, Liang R, et al. Quantum oscillations in underdoped YBa2 Cu3 O6.5. Physica B: Condensed Matter. 2009;404:354-6.

Daou R, Cyr-Choinière O, Laliberté F, Le Boeuf D, Doiron-Leyraud N, Yan J-, et al. Erratum: Thermopower across the stripe critical point of La1.6-x Nd0.4 Srx Cu O4: Evidence for a quantum critical point in a hole-doped high- Tc superconductor (Physical Review B (2009) 79 (180505)). Physical Review B. 2009;79.

Jaudet C, Vignolles D, Audouard A, Levallois J, Le Boeuf D, Doiron-Leyraud N, et al. De Haas-van Alphen oscillations in the underdoped high-temperature superconductor YBa2Cu3O6.5. Physical Review Letters. 2008;100.

Paglione J, Ho P-, Maple MB, Tanatar MA, Taillefer L, Lee Y, et al. Ambient-pressure bulk superconductivity deep in the magnetic state of CeRh In5. Physical Review B. 2008;77.

Li SY, Bonnemaison J-, Payeur A, Fournier P, Wang CH, Chen XH, et al. Low-temperature phonon thermal conductivity of single-crystalline Nd[sub 2]CuO[sub 4]: Effects of sample size and surface roughness. Physical Review B. 2008;77:134501.

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