Estimation of Spin-Spin Interaction by Weak Measurement Scheme

Details Estimation of Spin-Spin Interaction by Weak Measurement Scheme Estimation of Spin-Spin Interaction by Weak Measurement Scheme

2010-07-30

arxiv.org/abs/1007.5370v2

Europhys. Lett. 96, 40002 (2011)

Physics

Quantum Physics

4 pages, 1 table, 2 figures, to appear in Europhysics Letters

Scientific paper

10.1209/0295-5075/96/40002

Precisely knowing an interaction Hamiltonian is crucial to realize quantum information tasks, especially to experimentally demonstrate a quantum computer and a quantum memory. We propose a scheme to experimentally evaluate the spin-spin interaction for a two-qubit system by the weak measurement technique initiated by Yakir Aharonov and his colleagues. Furthermore, we numerically confirm our proposed scheme in a specific system of a nitrogen vacancy center in diamond. This means that the weak measurement can also be taken as a concrete example of the quantum process tomography.

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