TY - JOUR
AB - We propose an operational measure of distance of two quantum states, which conversely tells us their closeness. This is defined as a sum of differences in partial knowledge over a complete set of mutually complementary measurements for the two states. It is shown that the measure is operationally invariant and it is equivalent to the Hilbert-Schmidt distance. The operational measure of distance provides a remarkable interpretation of the information distance between quantum states.
AU - Lee, J.
AU - Kim, M. S.
AU - Brukner, Č.
DA - 2003/08/20/
JF - Phys. Rev. Lett.
PY - 2003
SE - 2003/08/20/
TI - Operationally Invariant Measure of the Distance between Quantum States
ER -