244 citations · 505 across the 8 of their papers we have counts for
8 papers
Qubit quantum-dot sensors: noise cancellation by coherent backaction, initial slips, and elliptical precession
M. Hell, M. R. Wegewijs, D. P. DiVincenzo
We theoretically investigate the backaction of a sensor quantum dot with strong local Coulomb repulsion on the transient dynamics of a qubit that is probed capacitively. We show th…
Dispersive Qubit Measurement by Interferometry with Parametric Amplifiers
Sh. Barzanjeh, D. P. DiVincenzo, B. M. Terhal
We perform a detailed analysis of how an amplified interferometer can be used to enhance the quality of a dispersive qubit measurement, such as one performed on a superconducting t…
High-Fidelity Single-Qubit Gates for Two-Electron Spin Qubits in GaAs
Pascal Cerfontaine, Tim Botzem, David P. DiVincenzo +1
Single-qubit operations on singlet-triplet qubits in GaAs double quantum dots have not yet reached the fidelities required for fault-tolerant quantum information processing. Consid…
Coherent Backaction of Quantum Dot Detectors: Qubit Isospin Precession
M. Hell, M. R. Wegewijs, D. P. DiVincenzo
A sensitive technique for the readout of the state of a qubit is based on the measurement of the conductance through a proximal sensor quantum dot (SQD). Here, we theoretically stu…
Self-Consistent Measurement and State Tomography of an Exchange-Only Spin Qubit
J. Medford, J. Beil, J. M. Taylor +7
We report initialization, complete electrical control, and single-shot readout of an exchange-only spin qubit. Full control via the exchange interaction is fast, yielding a demonst…
Quantum Circuits for Measuring Levin-Wen Operators
N. E. Bonesteel, D. P. DiVincenzo
We construct quantum circuits for measuring the commuting set of vertex and plaquette operators that appear in the Levin-Wen model for doubled Fibonacci anyons. Such measurements c…