Details

Autor(en) / Beteiligte

• Grimaudo, Roberto
• Isar, Aurelian
• Mihaescu, Tatiana
• Ghiu, Iulia
• Messina, Antonino

Titel

Dynamics of quantum discord of two coupled spin-1/2’s subjected to time-dependent magnetic fields

Ist Teil von

• Results in physics, 2019-06, Vol.13, p.102147, Article 102147

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2019

Link zum Volltext

Quelle

Elektronische Zeitschriftenbibliothek - Freely accessible e-journals

Beschreibungen/Notizen

• We describe the dynamics of quantum discord of two interacting spin-1/2’s subjected to controllable time-dependent magnetic fields. The exact time evolution of discord is given for various input mixed states consisting of classical mixtures of two Bell states. The quantum discord manifests a complex oscillatory behaviour in time and is compared with that of quantum entanglement, measured by concurrence. The interplay of the action of the time-dependent magnetic fields and the spin-coupling mechanism in the occurrence and evolution of quantum correlations is examined in detail.