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quant-ph2009
Metrics Of Quantum States
Zhi-Hao Ma, Fu-Lin Zhang, Jing-Ling Chen
In this paper, we study metrics of quantum states. These metrics are natural generalization of trace metric and Bures metric. We will prove that the metrics are joint convex and co…
quant-ph2008
Super fidelity and related metric
Zhi-Hao Ma, Fu-Lin Zhang, Zhi-Hua Chen +1
We report a new metric of quantum states. This metric is build up from super-fidelity, which has deep connection with the Uhlmann-Jozsa fidelity and plays an important role in quan…
quant-ph2008★ 20 cited
Geometric interpretation for A-fidelity and its relation with Bures fidelity
Zhihao Ma, Fu-Lin Zhang, Jing-Ling Chen
A geometric interpretation for the A-fidelity between two states of a qubit system is presented, which leads to an upper bound of the Bures fidelity. The metrics defined based on t…