Abstract
We suggest and demonstrate a tomographic method to characterise homodyne detectors at the quantum level. The positive operator measure associated with the detector is expanded in a quadrature basis and probed with a set of coherent states. The coefficients of the expansion are then retrieved using a least squares algorithm. Our model is general enough to describe different implementations of the homodyne setup, and it has proven capable of effectively describing the detector response to different tomographic sets. We validate the reconstructed operator measure on nonclassical states and exploit results to estimate the overall quantum efficiency of the detector.
Highlights
17 May 2017Original content from this work may be used under the terms of the Creative Abstract
Balanced homodyne detection is a crucial detection technique for continuous variable quantum technology and lies at the core of many experiments in fundamental quantum optics [1,2,3]
We have suggested and demonstrated a quantum detector tomography (QDT) technique for a homodyne detector
Summary
Original content from this work may be used under the terms of the Creative Abstract. We suggest and demonstrate a tomographic method to characterise homodyne detectors at the. The positive operator measure associated with the detector is expanded in a quadrature this work must maintain attribution to the basis and probed with a set of coherent states. Our model is general enough to describe different implementations of the work, journal citation and DOI. The homodyne setup, and it has proven capable of effectively describing the detector response to different tomographic sets. We validate the reconstructed operator measure on nonclassical states and exploit results to estimate the overall quantum efficiency of the detector
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