Local channels preserving maximal entanglement or Schmidt number
arXiv:1206.3119 · doi:10.1007/s10773-013-1688-y
Abstract
Maximal entanglement and Schmidt number play an important role in various quantum information tasks. In this paper, it is shown that a local channel preserves maximal entanglement state(MES) or preserves pure states with Schmidt number $r$($r$ is a fixed integer) if and only if it is a local unitary operation.
10 pages