The distribution of quantum fidelities |
| |
Authors: | Line Hjortshø j Pedersen,Klaus Mø lmer |
| |
Affiliation: | a Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, University of Aarhus, DK-8000 Århus C, Denmark b Department of Mathematical Sciences, University of Aarhus, Ny Munkegade, Bld. 1530, DK-8000 Århus C, Denmark |
| |
Abstract: | When applied to different input states, an imperfect quantum operation yields output states with varying fidelities, defined as the absolute square of their overlap with the desired states. We present an expression for the distribution of fidelities for a class of operations applied to a general qubit state, and we present general expressions for the variance and input-space averaged fidelities of arbitrary linear operations on state vectors in finite-dimensional Hilbert spaces. |
| |
Keywords: | 03.67.-a 42.50.Lc 89.70.+c |
本文献已被 ScienceDirect 等数据库收录! |
|