Variance-Based Sensitivity Analysis of $\Lambda$-type Quantum Memory

• URL: http://arxiv.org/abs/2210.05530v1
• Date: Tue, 11 Oct 2022 15:18:24 GMT
• Title: Variance-Based Sensitivity Analysis of $\Lambda$-type Quantum Memory
• Authors: Kai Shinbrough and Virginia O. Lorenz
• Abstract summary: We investigate the sensitivity of $Lambda$-type quantum memory to experimental fluctuations and drift. We find the parameters that a quantum memory is most sensitive to depend on the quantum memory protocol being employed.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The storage and retrieval of photonic quantum states, quantum memory, is a key resource for a wide range of quantum applications. Here we investigate the sensitivity of $\Lambda$-type quantum memory to experimental fluctuations and drift. We use a variance-based approach, focusing on the effects of fluctuations and drift on memory efficiency. We consider shot-to-shot fluctuations of the memory parameters, and separately we consider longer timescale drift of the control field parameters. We find the parameters that a quantum memory is most sensitive to depend on the quantum memory protocol being employed, where the observed sensitivity agrees with physical interpretation of the protocols. We also present a general framework that is applicable to other figures of merit beyond memory efficiency. These results have practical ramifications for quantum memory experiments.

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