16-qubit IBM universal quantum computer can be fully entangled

TL;DR

This paper demonstrates the creation of fully entangled states involving 8 to 16 qubits on IBM's 16-qubit quantum processor, showcasing the device's potential for complex quantum computations.

Contribution

It presents the first experimental realization of fully entangled states on a 16-qubit superconducting quantum computer using low-depth circuits.

Findings

Successfully prepared fully entangled graph states with 8 to 16 qubits

Verified inseparability across all partitions of the states

Shows the capability of IBM's quantum hardware for complex entanglement tasks

Abstract

Entanglement is an important evidence that a quantum device can potentially solve problems intractable for classical computers. In this paper, we prepare connected graph states involving 8 to 16 qubits on ibmqx5, a 16-qubit superconducting quantum processor accessible via IBM cloud,using low-depth circuits. We demonstrate that the prepared state is fully entangled, i.e. the state is inseparable with respect to any fixed partition.