Bagchi Shrobona, Thakuria Dimpi, Pati Arun Kumar
Center for Quantum Information, Korea Institute of Science and Technology, Seoul 02792, Republic of Korea.
Quantum Information and Computation Group, Harish-Chandra Research Institute, Chhatnag Road, Jhunsi, Allahabad 211019, India.
Entropy (Basel). 2023 Jul 12;25(7):1046. doi: 10.3390/e25071046.
In this paper, we derive a quantum speed limit for unitary evolution for the case of mixed quantum states using the stronger uncertainty relation for mixed quantum states. This bound can be optimized over different choices of Hermitian operators for a better bound. We illustrate this with some examples and show its better performance with respect to three existing bounds for mixed quantum states.
在本文中,我们利用混合量子态的更强不确定性关系,推导了混合量子态酉演化的量子速度极限。通过对厄米算符的不同选择进行优化,可以得到更好的界。我们通过一些例子对此进行说明,并展示了其相对于混合量子态的三个现有界的更好性能。