Quantum mechanics

Algorithm

Quantum computer

Quantum error correction

Cluster state

Theoretical computer science

Computer science

W state

One-way quantum computer

Physics

Quantum entanglement

Mathematics

Optics

Quantum network

Quantum

Combinatorics

Qubit

Topology (electrical circuits)

State (computer science)

npj Quantum Information

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.

16-qubit IBM universal quantum computer can be fully entangled