Quantum discord in central spin model

V. E. Zobov

doi:10.1117/12.2180727

18 December 2014 Quantum discord in central spin model

V. E. Zobov

Proceedings Volume 9440, International Conference on Micro- and Nano-Electronics 2014; 94401E (2014) https://doi.org/10.1117/12.2180727
Event: The International Conference on Micro- and Nano-Electronics 2014, 2014, Zvenigorod, Russian Federation

Abstract

The quantum properties of dynamic correlations in a system of an electron spin surrounded by nuclear spins under the conditions of free induction decay (FID) and spin echo have been studied. Analytical results for the time evolution of mutual information, classical part of correlations, and quantum part characterized by quantum discord have been obtained within the central spin model in the high-temperature approximation. The same formulas describe the quantum discord in both the FID and the spin echo although the forms of the dependences are different because of difference in the parameters entering into the formulas. Discord of the spin echo compared with the FID has a strong dependence on time at short times, and it tends to zero with decreasing of the magnetic field, whereas in the case of the FID it reaches a plateau.

Citation Download Citation

V. E. Zobov "Quantum discord in central spin model", Proc. SPIE 9440, International Conference on Micro- and Nano-Electronics 2014, 94401E (18 December 2014); https://doi.org/10.1117/12.2180727

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