Diagnostics of quantum-gate coherences via end-point-measurement statistics

• URL: http://arxiv.org/abs/2209.02049v1
• Date: Mon, 5 Sep 2022 16:39:21 GMT
• Title: Diagnostics of quantum-gate coherences via end-point-measurement statistics
• Authors: Ilaria Gianani, Alessio Belenchia, Stefano Gherardini, Vincenzo Berardi, Marco Barbieri, and Mauro Paternostro
• Abstract summary: We consider a figure of merit encoding the information on how the coherence generated on average by a quantum gate is affected by unitary errors. We provide numerical evidence that such information is well captured by the statistics of local energy measurements on the output states of the gate.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Quantum coherence is a central ingredient in quantum physics with several theoretical and technological ramifications. In this work we consider a figure of merit encoding the information on how the coherence generated on average by a quantum gate is affected by unitary errors (coherent noise sources). We provide numerical evidences that such information is well captured by the statistics of local energy measurements on the output states of the gate. These findings are then corroborated by experimental data taken in a quantum optics setting.

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