200 citations · 724 across the 12 of their papers we have counts for
12 papers
Measurement of exciton correlations using electrostatic lattices
M. Remeika, J. R. Leonard, C. J. Dorow +4
We present a method for determining correlations in a gas of indirect excitons in a semiconductor quantum well structure. The method involves subjecting the excitons to a periodic…
Coherence and Screening in Multi-Electron Spin Qubits
A. P. Higginbotham, F. Kuemmeth, M. P. Hanson +2
The performance of multi-electron spin qubits is examined by comparing exchange oscillations in coupled single-electron and multi-electron quantum dots in the same device. Fast (>…
Pattern Formation in the Exciton Inner Ring
M. Remeika, A. T. Hammack, S. Poltavtsev +6
We report on the spatially separated pump-probe study of indirect excitons in the inner ring in the exciton emission pattern. A pump laser beam generates the inner ring and a weake…
Transport of Indirect Excitons in a Potential Energy Gradient
J. R. Leonard, M. Remeika, M. K. Chu +6
We realized a potential energy gradient - a ramp - for indirect excitons using a shaped electrode at constant voltage. We studied transport of indirect excitons along the ramp and…
Relaxation and Readout Visibility of a Singlet-Triplet Qubit in an Overhauser Field Gradient
C. Barthel, J. Medford, H. Bluhm +4
Using single-shot charge detection in a GaAs double quantum dot, we investigate spin relaxation time T_1 and readout visibility of a two-electron singlet-triplet qubit following si…
Fast sensing of double-dot charge arrangement and spin state with an rf sensor quantum dot
C. Barthel, M. Kjaergaard, J. Medford +4
Single-shot measurement of the charge arrangement and spin state of a double quantum dot are reported, with measurement times down to ~ 100 ns. Sensing uses radio-frequency reflect…
Localization-Delocalization Transition of Indirect Excitons in Lateral Electrostatic Lattices
M. Remeika, J. C. Graves, A. T. Hammack +5
We study transport of indirect excitons in GaAs/AlGaAs coupled quantum wells in linear lattices created by laterally modulated gate voltage. The localization-delocalization transit…
A new mechanism of electric dipole spin resonance: hyperfine coupling in quantum dots
E. A. Laird, C. Barthel, E. I. Rashba +3
A recently discovered mechanism of electric dipole spin resonance, mediated by the hyperfine interaction, is investigated experimentally and theoretically. The effect is studied us…
Localization and interaction of indirect excitons in GaAs coupled quantum wells
Alexander High, Aaron Hammack, Leonid Butov +4
We introduced an elevated trap technique and exploited it for lowering the effective temperature of indirect excitons. We observed narrow photoluminescence lines which correspond t…
Effect of Exchange Interaction on Spin Dephasing in a Double Quantum Dot
E. A. Laird, J. R. Petta, A. C. Johnson +4
We measure singlet-triplet dephasing in a two-electron double quantum dot in the presence of an exchange interaction which can be electrically tuned from much smaller to much large…
Charge and spin manipulation in a few-electron double dot
J. R. Petta, A. C. Johnson, J. M. Taylor +5
We demonstrate high speed manipulation of a few-electron double quantum dot. In the one-electron regime, the double dot forms a charge qubit. Microwaves are used drive transitions…
Asymmetry of Nonlinear Transport and Electron Interactions in Quantum Dots
D. M. Zumbuhl, C. M. Marcus, M. P. Hanson +1
The symmetry properties of transport beyond the linear regime in chaotic quantum dots are investigated experimentally. A component of differential conductance that is antisymmetric…