scholarly journals Experimental test of fine-grained entropic uncertainty relation in the presence of quantum memory

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Wei-Min Lv ◽  
Chao Zhang ◽  
Xiao-Min Hu ◽  
Yun-Feng Huang ◽  
Huan Cao ◽  
...  
Keyword(s):  
Experimental Test ◽  
Uncertainty Relation ◽  
Quantum Memory ◽  
Fine Grained ◽  
Entropic Uncertainty Relation

Entanglement witness via quantum-memory-assisted entropic uncertainty relation

2017 ◽  
Vol 14 (12) ◽  
pp. 125208 ◽  
Author(s):  
Jiadong Shi ◽  
Zhiyong Ding ◽  
Tao Wu ◽  
Juan He ◽  
Lizhi Yu ◽  
...  
Keyword(s):  
Uncertainty Relation ◽  
Quantum Memory ◽  
Entanglement Witness ◽  
Entropic Uncertainty Relation

Quantum correlations and quantum-memory-assisted entropic uncertainty relation in two kinds of spin squeezing models

2019 ◽  
Vol 16 (9) ◽  
pp. 095202 ◽  
Author(s):  
Saeed Haddadi ◽  
Mohammad Reza Pourkarimi ◽  
Ahmad Akhound ◽  
Mehrdad Ghominejad
Keyword(s):  
Uncertainty Relation ◽  
Quantum Correlations ◽  
Spin Squeezing ◽  
Quantum Memory ◽  
Entropic Uncertainty Relation

Time evolution of quantum-memory-assisted entropic uncertainty relation and quantum correlations under dissipative environment

2019 ◽  
Vol 17 (01) ◽  
pp. 1950008 ◽  
Author(s):  
Mohammad Reza Pourkarimi
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Time Evolution ◽  
Uncertainty Relation ◽  
Quantum Correlations ◽  
Quantum Memory ◽  
Xy Model ◽  
Anisotropic Parameter ◽  
Entropic Uncertainty Relation ◽  
Dissipative Environment

By assuming the effect of dissipative environment and the Hamiltonian XY-model and external magnetic field, the time evolution of the entropic uncertainty relation (EUR) in the presence of quantum-memory and the dynamics of quantum correlations (QC) are investigated. It is shown that EUR and QC may evolve in different ways during the time. However, they can behave similarly when the time tends to infinity. The effects of external magnetic field and anisotropic parameter are different on the dynamics of EUR and QC.

Quantum-memory-assisted entropic uncertainty in fluctuating electromagnetic field with a boundary

2019 ◽  
Vol 34 (17) ◽  
pp. 1950099
Author(s):  
Zhiming Huang ◽  
Xiaobin Wang ◽  
Yiyong Ye ◽  
Xiaokui Sheng ◽  
Zhenbang Rong ◽  
...  
Keyword(s):  
Electromagnetic Field ◽  
Master Equation ◽  
Quantum Correlation ◽  
Uncertainty Relation ◽  
Boundary Effect ◽  
Quantum Memory ◽  
Plane Boundary ◽  
Evolution Time ◽  
Entropic Uncertainty Relation ◽  
Level Atom

In this work, we investigate the dynamics of quantum-memory-assisted entropic uncertainty relation for a two-level atom coupled with fluctuating electromagnetic field in the presence of a perfectly reflecting plane boundary. The solution of the master equation that governs the system evolution is derived. We find that entropic uncertainty and mixedness increase to a stable value with evolution time, but quantum correlation reduces to zero with evolution time. That is, the mixedness is positively associated with entropic uncertainty, however, increasing quantum correlation can cause the decrease of the uncertainty. The tightness of entropic uncertainty grows at first and then declines to zero with evolution time. In addition, entropic uncertainty fluctuates to relatively stable values with increasing the atom’s distance from the boundary, especially for short evolution time, which suggests a possible way of testing the vacuum fluctuating and boundary effect. Finally, we propose an effective method to control the uncertainty via quantum weak measurement reversal.

scholarly journals Tightening the tripartite quantum-memory-assisted entropic uncertainty relation

2020 ◽  
Vol 102 (5) ◽  
Author(s):  
H. Dolatkhah ◽  
S. Haseli ◽  
S. Salimi ◽  
A. S. Khorashad
Keyword(s):  
Uncertainty Relation ◽  
Quantum Memory ◽  
Entropic Uncertainty Relation
Sign in / Sign up

Export Citation Format

Share Document