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Prochains séminaires

mar, 05/21/2013 - 12:30

  1. Gabriel Poulin-Lamarre
    • 12:30
    • D3-2040
    • To be announced

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lun, 05/27/2013 - 12:30

  1. 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

  1. 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

  1. 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

  1. Frank Verstraete , Université de Vienne
    • 12:30
    • D3-2040
    • To be announced

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Fedorov A, Steffen L, Baur M, da Silva MP, Wallraff A. Implementation of a Toffoli gate with superconducting circuits. Nature. 2012;481:170-2.
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Bozyigit D, Lang C, Steffen L, Fink JM, Eichler C, Baur M, et al. Antibunching of microwave-frequency photons observed in correlation measurements using linear detectors. Nature Physics. 2011;7:154-8.
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Bozyigit D, Lang C, Steffen L, Fink JM, Eichler C, Baur M, et al. Correlation measurements of individual microwave photons emitted from a symmetric cavity. Journal of Physics: Conference Series. 2011;264:012024.
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Lang C, Bozyigit D, Eichler C, Steffen L, Fink JM, Abdumalikov AA, et al. Observation of resonant photon blockade at microwave frequencies using correlation function measurements. Phys. Rev. Lett.. 2011;106:243601.
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Bozyigit D, Lang C, Steffen L, Fink JM, Baur M, Bianchetti R, et al. Measurements of the Correlation Function of a Microwave Frequency Single Photon Source.. 2010.
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Bianchetti R, Filipp S, Baur M, Fink JM, Lang C, Steffen L, et al. Control and tomography of a three level superconducting artificial atom. Physical Review Letters. 2010;105.
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Baur M, Filipp S, Bianchetti R, Fink JM, Göppl M, Steffen L, et al. Measurement of autler-townes and mollow transitions in a strongly driven superconducting qubit. Physical Review Letters. 2009;102.
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Bianchetti R, Filipp S, Baur M, Fink JM, Göppl M, Leek PJ, et al. Dynamics of dispersive single-qubit readout in circuit quantum electrodynamics. Physical Review A. 2009;80.
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Fink JM, Bianchetti R, Baur M, Göppl M, Steffen L, Filipp S, et al. Dressed collective qubit states and the Tavis-Cummings model in circuit QED. Physical Review Letters. 2009;103.
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Filipp S, Maurer P, Leek PJ, Baur M, Bianchetti R, Fink JM, et al. Two-qubit state tomography using a joint dispersive readout. Physical Review Letters. 2009;102.
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