244 citations · 1.3k across the 10 of their papers we have counts for
8 papers · 1 filter
The Resonant Exchange Qubit
J. Medford, J. Beil, J. M. Taylor +4
We introduce a solid-state qubit in which exchange interactions among confined electrons provide both the static longitudinal field and the oscillatory transverse field, allowing r…
Electrically-protected resonant exchange qubits in triple quantum dots
J. M. Taylor, V. Srinivasa, J. Medford
We present a modulated microwave approach for quantum computing with qubits comprising three spins in a triple quantum dot. This approach includes single- and two-qubit gates that…
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…
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…
Scaling of Dynamical Decoupling for Spin Qubits
J. Medford, L. Cywinski, C. Barthel +3
We investigate scaling of coherence time, T2, with the number of π-pulses, n_π, in a singlet- triplet spin qubit using Carr-Purcell-Meiboom-Gill (CPMG) and concatenated dynamical d…
Conditional operation of a spin qubit
I. van Weperen, B. D. Armstrong, E. A. Laird +4
We report coherent operation of a singlet-triplet qubit controlled by the arrangement of two electrons in an adjacent double quantum dot. The system we investigate consists of two…
Interlaced Dynamical Decoupling and Coherent Operation of a Singlet-Triplet Qubit
C. Barthel, J. Medford, C. M. Marcus +2
We experimentally demonstrate coherence recovery of singlet-triplet superpositions by interlacing qubit rotations between Carr-Purcell (CP) echo sequences. We then compare performa…
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…