Concept

Diffuse series

Related publications (10)

Rapid high-temperature initialisation and readout of spins in silicon with 10 THz photons

Each cycle of a quantum computation requires a quantum state initialisation. For semiconductor-based quantum platforms, initialisation is typically performed via slow microwave processes and usually requires cooling to temperatures where only the lowest quantum level is occupied. In silicon, boron atoms are the most common impurities. They bind holes in orbitals including an effective spin-3/2 ground state as well as excited states analogous to the Rydberg series for hydrogen. Here we show that initialisati

Cornell University2026

LiY1-xHoxF4: a candidate material for the implementation of solid state qubits (Conference Presentation)

The model magnet LiY1-xHoxF4 has been shown to exhibit a variety of quantum many-body phenomena, such as quantum phase transitions, quantum annealing, long lived coherent oscillations and long-range entanglement, making LiY1-xHoxF4 a promising candidate for the implementation of solid state qubits. The magnetic moment of the Holmium atoms stems from the well screened f-shell electrons and the dynamics is largely dominated by dipolar interaction which can be tuned by doping concentration x. The energy levels

SPIE2018

Lighting up cells with lanthanide self-assembled helicates

Jean-Claude Bünzli

Lanthanide bioprobes and bioconjugates are ideal luminescent stains in view of their low propensity to photobleaching, sharp emission lines and long excited state lifetimes permitting time-resolved detection for enhanced sensitivity. We show here how the i ...

Royal Society, The2013

Microresonator-Based Optical Frequency Combs

The series of precisely spaced, sharp spectral lines that form an optical frequency comb is enabling unprecedented measurement capabilities and new applications in a wide range of topics that include precision spectroscopy, atomic clocks, ultracold gases, and molecular fingerprinting. A new optical frequency comb generation principle has emerged that uses parametric frequency conversion in high resonance quality factor (Q) microresonators. This approach provides access to high repetition rates in the range

American Association for the Advancement of Science2011

Exciton relaxation and level repulsion in GaAs/AlxGa1-xAs quantum wires

Benoît Marie Joseph Deveaud, Vincenzo Savona, Jean-Louis Staehli, Marc-André Dupertuis, Andrea Crottini, Reda Idrissi Kaitouni

V groove GaAs/AlGaAs quantum wires are investigated by spatially resolved photoluminescence spectroscopy using a low-temperature scanning near- field optical microscope. The spectra along the wires feature several sharp emission lines, which are understood as the emission from exciton states localized in inhomogeneities of the confining potential. It is expected that these exciton states spatially overlap and that their energies are correlated, which leads to level repulsion. The statistical analysis of the

2004

Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges

Olivier Sauter, Stefano Coda, Timothy Goodman, Antoine Pochelon, Mark Henderson, Petri Nikkola

Clear evidence is reported for the first time of a rapid localized reduction of core electron energy diffusivity during the formation of an electron internal-transport barrier. The transition occurs rapidly (similar or equal to3 ms), during a slow (similar or equal to200 ms) self-inductive evolution of the magnetic shear. This crucial observation, and the correlation of the transition with the time and location of the magnetic shear reversal, lend support to models attributing the reduced transport to the l

2004

Catalytic oxidation of the GaAs(110) surface promoted by a Cs overlayer

Giorgio Margaritondo

In order to investigate the dramatic enhancement of the oxidation rate of semiconductor materials, promoted by an alkali-metal overlayer, we exposed a GaAs(110) surface covered by a monolayer of Cs to oxygen, observing the photoemission spectra of As 2p, Ga 2p, Cs 4d, and O Is. We show evidence that the oxidation mechanism proceeds through (i) oxygen infiltration underneath the Cs monolayer; (ii) disruption of low-binding-energy bonds Cs-As and Cs-Ga established at the Cs/GaAs(110) interface before the expo

1996

Spectroscopy of the nitric oxide (NO) molecule in nitrogen and mixed nitrogen/krypton matrixes

Majed Chergui

Absorption, emission and excitation spectra of NO in N2 and mixed N2/Kr matrixes at various N2 concns. have been recorded by means of tunable synchrotron radiation and ArF laser excitation. The gas-to-matrix shifts, bandwidths and Stokes shifts of the lowest Rydberg level A2S+(v=0) level increase linearly with N2 concn. The blue-shift is attributed to modifications in the bulk properties of the crystals and not to local perturbations. In emission, the fluorescence from B2P(v= 0) and the phosphorescence from

Elsevier1993

Electronic and vibrational relaxation in Rydberg and valence states of nitric oxide in neon matrixes

Majed Chergui

New time and energy resolved data on vibrationally relaxed and unrelaxed emissions from the valence a4P(v = 0), B2P(v = 0,3,4,5), and the Rydberg A2S+ (v = 0,1,2) states of NO in Ne matrixes are reported. Rydberg .tautm. valence and valence .tautm. valence nonradiative transitions were identified. The Rydberg -> valence transitions occur after lattice relaxation accommodating the Rydberg orbital. The branching ratios for intramol. relaxation and the measured lifetimes are described in terms of a model which

1988

Complexes of lanthanoid salts with macrocyclic ligands. Part 26. Structural and spectroscopic investigations of the 1:1 complex between europium nitrate and a tetraoxadiaza macrocycle

Jean-Claude Bünzli, Gervais Chapuis

The crystal and molecular structure of dinitrato(1,7,10,16‐tetraoxa‐4,13‐diazacyclooctadecane)europium(III) nitrate, ([Eu(NO3)2(C12H26N2O4)]NO3) has been determined from single‐crystal X‐ ray diffraction: a = 12.567(3), b = 11.585(3), c = 16.354(5) Å, β = 112.45(2)°, space group P 21/n , Z = 4. The structure consists of discrete dinitrato complex cations and of nitrate anions. The Eu(III) ion is 10‐coordinate, bonding to the six donor atoms of the macrocycle and to four O‐atoms of the two bidentate nitrates

Wiley-VHCA AG1986

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Related publications (10)

Rapid and localized electron internal-transport-barrier formation during shear inversion in fully noninductive TCV discharges

Olivier Sauter, Stefano Coda, Timothy Goodman, Antoine Pochelon, Mark Henderson, Petri Nikkola

2004

Complexes of lanthanoid salts with macrocyclic ligands. Part 26. Structural and spectroscopic investigations of the 1:1 complex between europium nitrate and a tetraoxadiaza macrocycle

Jean-Claude Bünzli, Gervais Chapuis

Wiley-VHCA AG1986