Reversal of Photon-Scattering Errors in Atomic Qubits

Abstract

Spontaneous photon scattering by an atomic qubit is a notable example of environment-induced error and is a fundamental limit to the fidelity of quantum operations. In the scattering process the qubit loses its distinctive and coherent character owing to its entanglement with the photon. Using a single trapped ion we show that by utilizing the information carried by the photon we are able to coherently reverse this process and correct for the scattering error. We further used quantum process tomography to characterize the photon-scattering error and its correction scheme and demonstrate a correction fidelity greater than 85% whenever a photon was measured.

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Cited by in corpus (10)

• Measurement-induced steering of quantum systems
• Restoring Heisenberg scaling in noisy quantum metrology by monitoring the environment
• Learning the dynamics of open quantum systems from their steady states
• Spatially uniform single-qubit gate operations with near-field microwaves and composite pulse compensation
• Direct reconstruction of the quantum master equation dynamics of a trapped ion qubit
• Undoing a quantum measurement
• Parameter estimation with efficient photodetectors
• Single calcium-40 ion as quantum memory for photon polarization: a case study
• Emergence of a measurement basis in atom-photon scattering
• Monitoring-induced Entanglement Entropy and Sampling Complexity