Estimation of Spin-Spin Interaction by Weak Measurement Scheme

Abstract

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.

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

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Cited by in corpus (10)

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• Quantum sensors based on weak-value amplification cannot overcome decoherence
• Post-selected von Neumann measurement with Hermite-Gaussian and Laguerre-Gaussian pointer states
• Interferences in quantum eraser reveal geometric phases in modular and weak values
• Advantages of nonclassical pointer states in postselected weak measurements
• Estimation of quantum states by weak and projective measurements
• Dynamical quantum phase transition in diamond: applications in quantum metrology
• Weak measurement-based state estimation of Gaussian states of one-variable quantum systems
• Probabilistic magnetometry with two-spin system in diamond
• Measure the temperature of the spin via weak measurement