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

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Abolfath R, Hawrylak P, Pioro-Ladrière M, Sachrajda A. Quantum Hall droplets in coupled lateral quantum dots. Physica E: Low-Dimensional Systems and Nanostructures. 2006;34:636-9.

Pioro-Ladrière M, Sachrajda AS, Hawrylak P, Abolfath R, Lapointe J, Zawadzki P, et al. Quantum molecule in the low-electron limit. Physica E: Low-Dimensional Systems and Nanostructures. 2006;34:437-40.

Sachrajda AS, Pioro-Ladrière M, Ciorga M, Studenikin S, Zawadzki P, Hawrylak P, et al. Charge redistribution spectroscopy as a probe of spin phenomena in quantum dots. In: AIP Conference Proceedings. Vol 772.; 2005. p. 1303-6.

Pioro-Ladrière M, Abolfath R, Zawadzki P, Lapointe J, Studenikin SA, Sachrajda AS, et al. Charge sensing of an artificial H2+ molecule in lateral quantum dots. Physical Review B. 2005;72:1-5.

Korkusiński M, Hawrylak P, Ciorga M, Pioro-Ladrière M, Sachrajda AS. Pairing of spin excitations in lateral quantum dots. Physical Review Letters. 2004;93:206806-1.

Sachrajda AS, Korkusinski M, Hawrylak P, Ciorga M, Pioro-Ladrière M, Zawadzki P. Spin textures in few electron quantum dots. Journal of Magnetism and Magnetic Materials. 2004;272-276:e1273-e1274.

Pioro-Ladrière M, Ciorga M, Lapointe J, Zawadzki P, Korkusiński M, Hawrylak P, et al. Spin-blockade spectroscopy of a two-level artificial molecule. Physical Review Letters. 2003;91:026803/1-/4.

Ciorga M, Korkusiński M, Pioro-Ladrière M, Zawadzki P, Hawrylak P, Sachrajda AS. Simple spin textures in a quantum dot. Physica Status Solidi (B) Basic Research. 2003;238:325-30.

Ciorga M, Pioro-Ladrière M, Zawadzki P, Hawrylak P, Sachrajda AS. Tunable negative differential resistance controlled by spin blockade in single-electron transistors. Applied Physics Letters. 2002;80:2177.

Ciorga M, Wensauer A, Pioro-Ladrière M, Korkusinski M, Kyriakidis J, Sachrajda AS, et al. Collapse of the spin-singlet phase in quantum dots. Physical Review Letters. 2002;88:2568041-4.

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