Quantum phase transition with non-Markovianity of XY model under three-spin interaction and quantum speed limit time of a centrally interacting spin qubit

2021 ◽  
Vol 136 (10) ◽  
Author(s):  
Muhammad Musadiq ◽  
Salman Khan
Keyword(s):  
Phase Transition ◽  
Quantum Phase Transition ◽  
Quantum Phase ◽  
Xy Model ◽  
Spin Interaction ◽  
Speed Limit ◽  
Limit Time ◽  
Spin Qubit

Quantum correlations in Heisenberg XY spin-1 and spin-1/2 model with Dzyaloshinskii–Moriya interactions

2015 ◽  
Vol 13 (05) ◽  
pp. 1550035 ◽  
Author(s):  
Wajid Hussain Joyia
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Quantum Phase Transition ◽  
Quantum Correlation ◽  
Quantum Discord ◽  
Quantum Correlations ◽  
Spin Systems ◽  
Quantum Phase ◽  
Xy Model ◽  
Higher Spin

We study the quantum correlations in a spin-1/2 (qubit) and spin-1 (qutrit) Heisenberg XY model separately, based on quantum discord (QD) and measurement-induced disturbance (MID) respectively. We find the evidence of the first- and second-order quantum phase transition (QPT) in both spin-1/2 and spin-1 systems. The effect of the temperature, magnetic field and Dzyaloshinskii–Moriya (DM) interactions on QPT and quantum correlation are also investigated. Finally, we observed that the QD and MID are not only vigorous for higher spin systems but also more robust than entanglement.

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