Preparing tunable Bell-diagonal states on a quantum computer
The class of two-qubit Bell-diagonal states has been the workhorse for
developing understanding about the geometry, dynamics, and applications of
quantum resources. In this article, we present a quantum circuit for preparing
Bell-diagonal states on a quantum computer in a tunable way. We implement this
quantum circuit using the IBM Q 5 Yorktown quantum computer and, as an
application example, we measure the non-local, steering, entanglement, and
discord quantum correlations and non-local quantum coherence of Werner states.
Mauro B. Pozzobom Jonas Maziero