Quantum simulation of entanglement dynamics in a quantum processor
We implement a five-qubit protocol in IBM quantum processors to study
entanglement dynamics in a two qubit system in the presence of a simulated
environment. Specifically, two qubits represent the main system, while another
two qubits serve as the environment. Additionally, we employ an auxiliary qubit
to estimate the quantum entanglement. Specifically, we observe the sudden death
and sudden birth of entanglement for different inital conditions that were
simultaneously implemented on the IBM 127-qubit quantum processor
\textit{ibm$\_$brisbane}. We obtain the quantum entanglement evolution of the
main system qubits and the environment qubits averaging over $N=10$ independent
experiments in the same quantum device. Our experimental data shows the
entanglement and disentanglement signatures in system and enviroment qubits,
where the noisy nature of current quantum processors produce a shift on times
signaling sudden death or sudden birth of entanglement. This work takes
relevance showing the usefulness of current noisy quantum devices to test
fundamental concepts in quantum information.
C. Inzulza S. Saavedra-Pino F. Albarrán-Arriagada P. Roman J. C. Retamal