"Quantum Nanoelectronics" Seminars
Quantum computing with magnetic color center in diamond
Tuesday 28 May 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Thomas CHANIER (Wigner Institute for Solid-State Physics, Budapest) Magnetic color centers in diamond have received a lot of interest in the research community due to their potential use as qubits for solid-state quantum computing or as single photon source for quantum key distribution in quantum cryptography. Indeed, diamond's...
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Tuesday 5 July 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Patrice ROCHE (SPEC, CEA-Saclay)
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Tuesday 18 June 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS François LEFLOCH (INAC/SPSMS)
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Tuesday 25 June 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Christophe JUSSIEU (INSP Jussieu, Paris)
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Tuesday 25 August 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Teun KLAPWIJK (Delft University of Technology, Netherlands)
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Tuesday 3 September 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Per DELSING (Chalmers, Sweden)
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Tuesday 10 September 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Vincent BOUCHIAT (Néel Institute, Grenoble)
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Tuesday 8 October 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Achim ROSCH (University of Cologne, Germany)
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Tuesday 8 October 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Janine SPLETTSTOESSER (University of Aachen, Germany)
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[Read More]Spectroscopy of Andreev bound states: revealing the hidden side of the Josephson effect
Tuesday 15 January 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Landry BRETHEAU (Quantronics Group, CEA Saclay) The Josephson effect describes how phase coherence is established between two weakly coupled superconductors. Microscopically, the Josephson current is carried by Cooper pairs, occupying Andreev bound states, localized at the weak link. Andreev bound states come in pairs...
[Read More]Spintronics phenomena and their use in memory, logic and radiofrequency applications
Tuesday 22 January 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Bernard DIENY (INAC/SPINTEC) Spinelectronics is a very rapidly growing area of R&D that merges magnetism and electronics (Nobel Prize 2007). Since the discovery of GMR (Giant magnetoresistance) in 1988, several breakthroughs have further boosted this field (spin-valves 1990, tunnel magnetoresistance (TMR) 1995,...
[Read More]Probing the phase dependent Dynamics of Andreev States in a Normal/Superconducting ring: supercurrent fluctuations and spectroscopy of the minigap.
Tuesday 29 January 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Hélène BOUCHIAT (LPS, Orsay) A mesoscopic NS ring is characterized by a dense phase dependent Andreev spectrum. Its linear current response to a high frequency ac flux is investigated in a large frequency range using a multimode superconducting resonator. We find that the current response exhibits, beside the well...
[Read More]Single-electron counting statistics of shot and thermal noise in nanowire Si MOSFETs
Tuesday 5 February 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Katsuhiko NISHIGUSHI (NTT Basic Research Laboratories, Kanagawa - Japan) Single electrons can be manipulated by means of a Coulomb blockade effect [1], which becomes active in a tiny conductive particle. However, since Coulomb blockade is based on stochastic events of electron tunneling, it is fundamentally...
[Read More]Spin dynamics and noise in low-dimensional systems with orbital memory
Tuesday 12 February 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Eugene SHERMAN (University of the Basque Country, Bilbao - Spain) We consider memory effects for spin dynamics and spin noise of electrons in two systems with disorder in the spin-orbit coupling. The disorder has the spatial scale of the order of 10 nm. First system is a two-dimensional...
[Read More]Quantum fluids of exciton polaritons
Tuesday 12 March 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Michiel WOUTERS (University of Antwerp, Belgium) Exciton-polaritons are bosonic quasi-particles in semiconductor microcavities that have favorable properties to employ them for the study of quantum liquids. Thanks to their photonic component, they feature good coherence properties, thanks to their excitonic nature, they show significant...
[Read More]Field mapping in the TEM with nm-scale resolution
Tuesday 19 March 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS David COOPER (CEA-LETI) Off-axis electron holography is an electr on microscopy based technique that can be used to measure the phase of an electron that has passed through a region of interest. As the phase of an electron is sensitive to the magnetic and electric fields in and around a specimen, it can be used to measure these properties...
[Read More]Josephson nanocircuits as key elements to implement coherent caloritronics
Tuesday 26 March 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Francesco GIAZOTTO (Scuola Normale Superiore - Pise, Italie) The Josephson effect [1] represents perhaps the prototype of macroscopic phase coherence and is at the basis of the most widespread interferometer, i.e., the superconducting quantum interference device (SQUID) [2]. Yet, in analogy to electric...
[Read More]Electron quantum optics in quantum Hall edge channels
Tuesday 9 April 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Gwendal FEVE (Laboratoire Pierre Aigrain, Paris) The ballistic propagation of electronic waves along the quantum Hall edge channels of a two dimensional electron gas bears strong analogies with photon optics. Ballistic and one-dimensional propagation are ensured by the chiral quantum Hall edge states and electronic beam splitters can be...
[Read More]Superconducting hybrid nano structures: properties & macroscopic quantum phenomena
Tuesday 16 April 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Francesco TAFURI (University of Napoli) High critical temperature superconductors (HTS) nano-sized systems ranging from YBaCuO nano-junctions and nano-channels to hybrid systems incorporating semiconducting InAs nanowires have been realized and characterized. Reference samples employing low temperature superconductors have been...
[Read More]Ballistic Interference in Ultraclean Suspended Graphene
Tuesday 7 May 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Romain MAURAND (University of Basel, Switzerland) We have fabricated suspended monolayer graphene devices on organic lift-off resists. We have extended this technology, which was introduced by N. Trombos et al. in 2011 [1], allowing to add a multitude of bottom and top gates. Using in-situ current annealing, we show that exceptional high...
[Read More]STATISTICS OF RADIATION AT JOSEPHSON PARAMETRIC RESONANCE
Tuesday 21 May 2013 at 3pm Room "Remy Lemaire" K 223 (1st floor) Building K, Institut Néel / CNRS Ciprian PADURARIU ( Delft University, The Netherlands) My talk focuses on the counting statistics of radiation emitted below the threshold of parametric resonance in a Josephson junction circuit. This theoretical work was motivated by a recent experiment [Hofheinz et al., Phys. Rev. Lett. 106, 217005 (2011)] that has measured the...
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