Tomography of a spin qubit in a double quantum dot

作者：Takahashi Maki^*; Bartlett Stephen D; Doherty Andrew C

来源：Physical Review A, 2013, 88(2): 022120.

DOI：10.1103/PhysRevA.88.022120

We investigate a range of methods to perform tomography in a solid-state qubit device, for which a priori initialization and measurement of the qubit is restricted to a single basis of the Bloch sphere. We explore and compare several methods to acquire precise descriptions of additional states and measurements, quantifying both stochastic and systematic errors, ultimately leading to a tomographically complete set that can be subsequently used in process tomography. We focus in detail on the example of a spin qubit formed by the singlet-triplet subspace of two electron spins in a GaAs double quantum dot, although our approach is quite general.

• 出版日期2013-8-23