• Publications
  • Influence
Rapid single-shot measurement of a singlet-triplet qubit.
We report repeated single-shot measurements of the two-electron spin state in a GaAs double quantum dot. The readout allows measurement with a fidelity above 90% with a approximately 7 micros cycleExpand
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Fast single-charge sensing with a rf quantum point contact
We report high-bandwidth charge sensing measurements using a GaAs quantum point contact embedded in a radio frequency impedance matching circuit (rf-QPC). With the rf-QPC biased near pinch-off whereExpand
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Suppressing Spin Qubit Dephasing by Nuclear State Preparation
Coherent spin states in semiconductor quantum dots offer promise as electrically controllable quantum bits (qubits) with scalable fabrication. For few-electron quantum dots made from gallium arsenideExpand
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A Ge/Si heterostructure nanowire-based double quantum dot with integrated charge sensor.
One proposal for a solid-state-based quantum bit (qubit) is to control coupled electron spins on adjacent semiconductor quantum dots. Most experiments have focused on quantum dots made from III-VExpand
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Interfacing spin qubits in quantum dots and donors—hot, dense, and coherent
Semiconductor spins are one of the few qubit realizations that remain a serious candidate for the implementation of large-scale quantum circuits. Excellent scalability is often argued for spin qubitsExpand
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Dispersive readout of a few-electron double quantum dot with fast RF gate sensors.
We report the dispersive charge-state readout of a double quantum dot in the few-electron regime using the in situ gate electrodes as sensitive detectors. We benchmark this gate sensing techniqueExpand
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Engineering the quantum-classical interface of solid-state qubits
Spanning a range of hardware platforms, the building-blocks of quantum processors are today sufficiently advanced to begin work on scaling-up these systems into complex quantum machines. A keyExpand
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Phenomenological model for the 0.7 conductance feature in quantum wires
One-dimensional (1D) quantum wires exhibit a conductance feature near $0.7\ifmmode\times\else\texttimes\fi{}2{e}^{2}∕\mathrm{h}$ in connection with many-body interactions involving the electron spin.Expand
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Shot-noise signatures of 0.7 structure and spin in a quantum point contact.
We report simultaneous measurement of shot noise and dc transport in a quantum point contact as a function of source-drain bias, gate voltage, and in-plane magnetic field. Shot noise at zero fieldExpand
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Frequency multiplexing for readout of spin qubits
We demonstrate a low loss, chip-level frequency multiplexing scheme for readout of scaled-up spin qubit devices. By integrating separate bias tees and resonator circuits on-chip for each readoutExpand
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