Decoherence of up to 8-qubit entangled states in a 16-qubit superconducting quantum processor
Year: 2019
Type: article
Abstract: We report on the coherence of Greenberger–Horne–Zeilinger (GHZ) states comprised of up to 8 qubits in the IBM ibmqx5 16-qubit quantum processor. In particular, we evaluate the coherence of GHZ states with N = 1, …, 8 qubits 4 , as a function of a delay time between state creation and measurement. We find that the decay in coherence occurs at a rate that is linear in the number of qubits. This is consistent with a model in which the dominant noise affecting the system is uncorrelated across qubits.
Source: Quantum Science and Technology
Authors: Asier Ozaeta, Peter L McMahon
Institution: Stanford University
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2779862608