306 citations · 1.1k across the 7 of their papers we have counts for
7 papers
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…
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…
Rapid Single-Shot Measurement of a Singlet-Triplet Qubit
C. Barthel, D. J. Reilly, C. M. Marcus +2
We report repeated single-shot measurements of the two-electron spin state in a GaAs double quantum dot. The readout scheme allows measurement with fidelity above 90% with a 7 micr…
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…
Hyperfine-mediated gate-driven electron spin resonance
E. A. Laird, C. Barthel, E. I. Rashba +3
An all-electrical spin resonance effect in a GaAs few-electron double quantum dot is investigated experimentally and theoretically. The magnetic field dependence and absence of ass…