Preparing tunable Bell-diagonal states on a quantum computer

Abstract

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.

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• Experimental validation of the Kibble-Zurek Mechanism on a Digital Quantum Computer
• Simulating of X-states and the two-qubit XYZ Heisenberg system on IBM quantum computer
• Quasiprobability fluctuation theorem behind the spread of quantum information
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• A variational quantum algorithm for entanglement quantification
• Generation of phonon quantum states and quantum correlations among single photon emitters in hexagonal boron nitride