Department of Physics | Université de Sherbrooke

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Tomorrow

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

Lupien C, Ellman B, Grütter P, Taillefer L. Piezoresistive torque magnetometry below 1 K. Applied Physics Letters. 1999;74:451-3.

Taillefer L, Ellman B, Lussier B, Poirier M. On the gap structure of UPt3: Phases A and B. Physica B: Condensed Matter. 1997;230-232:327-31.

Ellman B, Taillefer L. Intrinsic pinning in the high-field C phase of UPt3. Physical Review B. 1997;56:R5767-R5770.

Chiao M, Lussier B, Ellman B, Taillefer L. Heat conduction in the heavy fermion superconductor UPd2Al3. Physica B: Condensed Matter. 1997;230-232:370-2.

Gagnon R, Pu S, Ellman B, Taillefer L. Anisotropy of heat conduction in YBa2Cu3O6.9: A probe of chain superconductivity. Physical Review Letters. 1997;78:1976-9.

Taillefer L, Ellman B, Lussier B, Poirier M. Studies of the gap structure in the heavy fermion superconductor UPt3. Czechoslovak Journal of Physics. 1996;46:793-4.

Lussier B, Ellman B, Taillefer L. Determination of the gap structure in UPt3 by thermal conductivity. Physical Review B. 1996;53:5145-8.

Ellman B, Taillefer L, Poirier M. Transverse ultrasound revisited: A directional probe of the A phase of UPt3. Physical Review B. 1996;54:9043-6.

Ellman B, Zaluska A, Taillefer L. Structural modulations in UPt3 single crystal whiskers. Physica B: Physics of Condensed Matter. 1995;205:346-8.

Gold Z, Gagnon R, Ellman B, Taillefer L, Behnia K. Anisotropic thermal conductivity of YBa2Cu3O7-δ. Physica C: Superconductivity and its applications. 1994;235-240:1485-6.

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