00632nas a2200121   4500000000100000008004100001100002200042700002200064245005100086300001100137490000700148520035500155       2009                            d1 aZbigniew Puchała1 aJaroslaw Miszczak00aBound on trace distance based on superfidelity  a0243020 v793 aWe provide a bound for the trace distance between two quantum states. The lower bound is based on the superfidelity, which provides the upper bound on quantum fidelity. One of the advantages of the presented bound is that it can be estimated using a simple measurement procedure. We also compare this bound with the one provided in terms of fidelity.