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arXiv · 2602.13946

Homodyne Detection of Temporally Resolved Quantum States

Owen Sandner·Brendan Mackey·Yuyang Liu·Connor Kupchak·Andrew MacRae
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Abstract

We present an analysis of the time domain measurement of temporally resolvable quantum states using balanced homodyne detection. Our approach outlines a formalism of detecting quantum states in arbitrary temporal modes via projection of the temporal mode onto a natural detector basis. We then present an algorithm for simulating the resultant photocurrent of continuous homodyne detection in the presence of a temporally resolved mode, and use this algorithm to explore the effects of realistic measurement errors on marginal reconstruction and quantum state tomography. A complete implementation of the method is provided through open source code on a GitHub repository.

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Owen Sandner, Brendan Mackey, Yuyang Liu, Connor Kupchak, Andrew MacRae. 2026-02-15. Homodyne Detection of Temporally Resolved Quantum States. https://arxiv.org/abs/2602.13946

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