Strong bound between trace distance and Hilbert-Schmidt distance for low-rank states
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DOI: 10.1103/physreva.100.022103
Abstract: The trace distance between two quantum states, $\rho$ and $\sigma$, is an operationally meaningful quantity in quantum information theory. However, in general it is difficult to compute, involving the diagonalization of $\rho - \sigma$. In… read more here.
Keywords: distance; low rank; trace; schmidt distance ... See more keywords