Quantum correlation and entropic uncertainty in a quantum-dot system |
| |
| Affiliation: | School of Physics and Optoelectronic Engineering, Anhui University, Hefei 230601, China |
| |
| Abstract: | We explore the dynamical behaviors of the measurement uncertainty and quantum correlation for a vertical quantum-dot system in the presence of magnetic field, including electron-electron interaction and Coulomb-blocked systems. Stemming from the quantum-memory-assisted entropic uncertainty relation, the uncertainty of interest is associated with temperature and parameters related to the magnetic field. Interestingly, the temperature has two kinds of influences on the variation of measurement uncertainty with respect to the magnetic-field-related parameters. We also discuss the relation between the lower bound of Berta et al. and the quantum discord. It is found that there is a natural competition between the quantum discord and the entropy minΠiBSΠiB(ρA|B). Finally, we bring in two improved bounds to offer a more precise limit to the entropic uncertainty. |
| |
| Keywords: | entropic uncertainty relation quantum correlation quantum dot |
|
| 点击此处可从《中国物理 B》浏览原始摘要信息 |
|
点击此处可从《中国物理 B》下载免费的PDF全文 |
|
