Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2011-01-29
Phys. Rev. Lett. 107 030506 (2011)
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
related papers here: http://marcuslab.harvard.edu
Scientific paper
10.1103/PhysRevLett.107.030506
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 pairs of capacitively coupled double quantum dots fabricated by electrostatic gates on the surface of a GaAs heterostructure. We extract the strength of the capacitive coupling between qubit and double quantum dot and show that the present geometry allows fast conditional gate operation, opening pathways to multi-qubit control and implementation of quantum algorithms with spin qubits.
Armstrong Dennis B.
Gossard Arthur. C.
Hanson Malcolm P.
Laird E. A.
Marcus Charles M.
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