Entanglement assisted probe of the non-Markovian to Markovian transition in open quantum system dynamics

• URL: http://arxiv.org/abs/2401.13735v2
• Date: Tue, 14 May 2024 00:04:30 GMT
• Title: Entanglement assisted probe of the non-Markovian to Markovian transition in open quantum system dynamics
• Authors: Chandrashekhar Gaikwad, Daria Kowsari, Carson Brame, Xingrui Song, Haimeng Zhang, Martina Esposito, Arpit Ranadive, Giulio Cappelli, Nicolas Roch, Eli M. Levenson-Falk, Kater W. Murch,
• Abstract summary: We prepare an entangled state between two qubits and monitor the evolution of entanglement over time. We observe the collapse and revival of the entanglement as a signature of quantum memory effects in the environment.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We utilize a superconducting qubit processor to experimentally probe non-Markovian dynamics of an entangled qubit pair. We prepare an entangled state between two qubits and monitor the evolution of entanglement over time as one of the qubits interacts with a small quantum environment consisting of an auxiliary transmon qubit coupled to its readout cavity. We observe the collapse and revival of the entanglement as a signature of quantum memory effects in the environment. We then engineer the non-Markovianity of the environment by populating its readout cavity with thermal photons to show a transition from non-Markovian to Markovian dynamics, ultimately reaching a regime where the quantum Zeno effect creates a decoherence-free subspace that effectively stabilizes the entanglement between the qubits.

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