Department of Physics | Université de Sherbrooke

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Today

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.
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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, Strach T, Ruf T, Cardona M, Nekvasil V, Zhigunov DI, et al. Raman study of crystal-field excitations in Pr2-xCexCuO4. Physica C: Superconductivity and its Applications. 1999;322:87-92.

Jandl S, Strach T, Ruf T, Cardona M, Nekvasil V, Chen C, et al. Effect of Ce doping on Raman-active crystal-field excitations in Nd2-xCexCuO4. Journal of Physics and Chemistry of Solids. 1998;59:1985-7.

Nekvasil V, Jandl S, Strach T, Ruf T, Cardona M. On the multiple peak structure of electronic Raman scattering spectra in Ce-doped Nd2CuO4. Journal of Magnetism and Magnetic Materials. 1998;177-181:535-6.

Strach T, Ruf T, Cardona M, Jandl S, Nekvasil V, Chen C, et al. Zeeman study of Raman-active crystal-field transitions in Nd2CuO4 and Sm2CuO4. Physical Review B. 1997;56:5578-82.

Strach T, Ruf T, Cardona M, Jandl S, Nekvasil V. Crystal-field transitions in (RE)2 - XCexCuO4: Raman versus inelastic neutron scattering. Physica B: Condensed Matter. 1997;234-236:810-1.

Jandl S, Strach T, Ruf T, Cardona M, Nekvasil V, Iliev M, et al. Raman study of crystal-field excitations in Pr2CuO4. Physical Review B. 1997;56:5049-52.

Nekvasil V, Strach T, Ruf T, Cardona M, Jandl S, Chen C, et al. Zeeman study of electronic Raman transitions in Nd2CuO4. Journal of Alloys and Compounds. 1997;250:619-22.

Strach T, Ruf T, Cardona M, Lin CT, Jandl S, Nekvasil V, et al. Raman study of intermultiplet crystal-field transitions in Sm2CuO4. Physical Review B. 1996;54:4276-82.

Jandl S, Dufour P, Strach T, Ruf T, Cardona M, Nekvasil V, et al. Raman study of crystal-field excitations in Nd1.85Ce0.15CuO4. Physical Review B. 1996;53:8632-7.

Jandl S, Dufour P, Strach T, Ruf T, Cardona M, Nekvasil V, et al. Raman study of intermultiplet crystal-field excitations in Nd2CuO4. Physical Review B. 1995;52:15558-64.

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