Observation of Entangled States of a Fully Controlled 20-Qubit System

Abstract

We generate and characterise entangled states of a register of 20 individually controlled qubits, where each qubit is encoded into the electronic state of a trapped atomic ion. Entanglement is generated amongst the qubits during the out-of-equilibrium dynamics of an Ising-type Hamiltonian, engineered via laser fields. Since the qubit-qubit interactions decay with distance, entanglement is generated at early times predominantly between neighbouring groups of qubits. We characterise entanglement between these groups by designing and applying witnesses for genuine multipartite entanglement. Our results show that, during the dynamical evolution, all neighbouring qubit pairs, triplets, most quadruplets, and some quintuplets simultaneously develop genuine multipartite entanglement. Witnessing genuine multipartite entanglement in larger groups of qubits in our system remains an open challenge.

20 pages, 4 figures

References in corpus (11)

• The Quantum Internet
• Entanglement detection
• 14-qubit entanglement: creation and coherence
• Efficient quantum state tomography
• Direct Fidelity Estimation from Few Pauli Measurements
• Taming multiparticle entanglement
• Entanglement Detection in the Stabilizer Formalism
• Determining lower bounds on a measure of multipartite entanglement from few local observables
• Characterizing multipartite entanglement without shared reference frames
• Heralded Polynomial-Time Quantum State Tomography
• Reconstructing quantum states efficiently

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