Europhys. Lett.
Volume 67, Number 6, September 2004
Page(s) 874 - 880
Section General
Published online 01 September 2004
Europhys. Lett., 67 (6), pp. 874-880 (2004)
DOI: 10.1209/epl/i2004-10154-1

Quantum tomography for solid-state qubits

Yu-xi Liu1, L. F. Wei1, 2 and Franco Nori1, 3

1  Frontier Research System, The Institute of Physical and Chemical Research (RIKEN) Wako-shi, Saitama, 351-0198, Japan
2  Institute of Quantum Optics and Quantum Information, Department of Physics Shanghai Jiaotong University - Shanghai 200030, PRC
3  Center for Theoretical Physics, Physics Department, CSCS The University of Michigan - Ann Arbor, MI 48109-1120, USA

(Received 24 February 2004; accepted in final form 23 July 2004)

We propose a method for the tomographic reconstruction of qubit states for a general class of solid-state systems in which the Hamiltonians are represented by spin operators, e.g., with Heisenberg-, XXZ-, or XY-type exchange interactions. We analyze the implementation of the projective operator measurements, or spin measurements, on qubit states. All the qubit states for the spin Hamiltonians can be reconstructed by using experimental data.

03.65.Ta - Foundations of quantum mechanics; measurement theory.
03.65.Wj - State reconstruction, quantum tomography.

© EDP Sciences 2004