Thermal Quantum Discord and Super Quantum Discord Teleportation Via a Two-Qubit Spin-Squeezing Model

2018 ◽  
Vol 195 (1) ◽  
pp. 628-639 ◽  
Author(s):  
S. Ahadpour ◽  
F. Mirmasoudi
Keyword(s):  
Quantum Discord ◽  
Spin Squeezing ◽  
Spin Squeezing Model ◽  
Super Quantum Discord

Super-quantum discord with weak measurement in circuit QED

Optik ◽  
2016 ◽  
Vol 127 (18) ◽  
pp. 7180-7187
Author(s):  
Yinghua Ji ◽  
Baogen Deng ◽  
Juju Hu
Keyword(s):  
Quantum Discord ◽  
Weak Measurement ◽  
Circuit Qed ◽  
Super Quantum Discord

Super quantum discord and other correlations for tripartite GHZ-type squeezed states

2015 ◽  
Vol 67 (2) ◽  
pp. 311-317 ◽  
Author(s):  
S. Rfifi ◽  
F. Siyouri ◽  
M. El Baz ◽  
Y. Hassouni
Keyword(s):  
Quantum Discord ◽  
Squeezed States ◽  
Super Quantum Discord

scholarly journals Effects of phase shift on bipartite and multipartite correlations of a spin chain under dephasing

Open Physics ◽  
2015 ◽  
Vol 13 (1) ◽  
Author(s):  
Ai-Xi Chen ◽  
Jian-Song Zhang
Keyword(s):  
Steady State ◽  
Phase Shift ◽  
Analytical Solution ◽  
Spin Chain ◽  
Quantum Discord ◽  
Present Model ◽  
Spin Squeezing ◽  
Heisenberg Chain ◽  
Initial Correlations ◽  
Long Time

AbstractWe investigate the effects of phase shift on entanglement, quantum discord, geometric discord, and spinsqueezing of a Heisenberg chain under dephasing. An analytical solution of the present model is obtained. Our results show that the initial correlations of the spin chain could be partially stored for a long time in the presence of dephasing and the amount of steady state correlations can be adjusted via phase shift. Particularly, we find the effects of phase shift on quantum discord and geometric discord are not always the same, i.e., the increase of geometric discord does not always imply the increase of quantum discord. Then, we calculate the spin-squeezing of the spin chain and find that spin-squeezing first increases with time and then reaches a plateau. The amount of spin-squeezing can be controlled via phase shift.

scholarly journals Super Quantum Discord for X-type States

2014 ◽  
Vol 54 (2) ◽  
pp. 680-688 ◽  
Author(s):  
Tao Li ◽  
Teng Ma ◽  
Yaokun Wang ◽  
Shaoming Fei ◽  
Zhixi Wang
Keyword(s):  
Quantum Discord ◽  
Super Quantum Discord
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