29 citations · 191 across the 30 of their papers we have counts for
8 papers · 1 filter
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…
Connection between Coulomb and harmonic oscillator potentials in relativistic quantum mechanics
Bo Fu, Fu-Lin Zhang, Jing-Ling Chen
The Levi-Civita transformation is applied in the two-dimensional (2D) Dirac and Klein-Gordon (KG) equations with equal external scalar and vector potentials. The Coulomb and harmon…
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…
Bounds of concurrence and their relation with fidelity and frontier states
Zhihao Ma, Fu-Lin Zhang, Dong-Ling Deng +1
The bounds of concurrence in [F. Mintert and A. Buchleitner, Phys. Rev. Lett. 98 (2007) 140505] and [C. Zhang \textit{et. al.}, Phys. Rev. A 78 (2008) 042308] are proved by using t…
Fidelity induced distance measures for quantum states
Zhihao Ma, Fu-Lin Zhang, Jing-Ling Chen
Fidelity plays an important role in quantum information theory. In this letter, we introduce new metric of quantum states induced by fidelity, and connect it with the well-known tr…
Dynamical symmetries of the Klein-Gordon equation
Fu-Lin Zhang, Jing-Ling Chen
The dynamical symmetries of the two-dimensional Klein-Gordon equations with equal scalar and vector potentials (ESVP) are studied. The dynamical symmetries are considered in the pl…