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math-ph2022★ 1 cited
Right mean for the Bures-Wasserstein quantum divergence
Miran Jeong, Jinmi Hwang, Sejong Kim
A new quantum divergence induced from the Renyi relative entropy, called the Bures-Wasserstein quantum divergence, has been recently introduced. We investigate in this…
math-ph2013★ 1 cited
Fidelity of Mobius matrices related with Lorentz boosts
Sejong Kim
In this article we consider the extended version of a real counterpart of qubit density matrices, called the Möbius matrix, and we see that it is a normalized Lorentz boost. Using…
math-ph2011★ 20 cited
Distances of qubit density matrices on Bloch sphere
Sejong Kim
We recall the Einstein velocity addition on the open unit ball $\B$ of and its algebraic structure, called the Einstein gyrogroup. We establish an isomorphism between the…