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Advantage of Non-Gaussian Operations in Phase Estimation via Mach–Zehnder Interferometer

Advanced Quantum Technologies, ISSN: 2511-9044
2024
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Most Recent News

Study Data from Institute for Mathematical Sciences Update Knowledge of Quantum Technology (Advantage of Non-gaussian Operations In Phase Estimation Via Mach-zehnder Interferometer)

2024 DEC 24 (NewsRx) -- By a News Reporter-Staff News Editor at Tech Daily News -- Investigators discuss new findings in Technology - Quantum Technology.

Article Description

This study investigates the benefits of probabilistic non-Gaussian operations in phase estimation using difference-intensity and parity detection-based Mach–Zehnder interferometers (MZI). An experimentally implementable model is considered to perform three different non-Gaussian operations, namely photon subtraction (PS), photon addition (PA), and photon catalysis (PC) on a single-mode squeezed vacuum (SSV) state. The findings reveal that all non-Gaussian operations except one PC operation provide an advantage in either of the measurement schemes. This result is further supported by the analysis of the quantum Cramér–Rao bound. When accounting for the success probability of non-Gaussian operations, two-PC and four-PA emerges as the most optimal operations in difference-intensity and parity detection-based MZI, respectively. Additionally, the corresponding squeezing and transmissivity parameters that yields the best performance are identified, making the study relevant for experimentalists. Furthermore, a general expression for the moment-generating function is derived, which is useful in exploring other detection schemes such as homodyne detection and quadratic homodyne detection.

Bibliographic Details

Manali Verma; Prasanta K. Panigrahi; Chandan Kumar; Karunesh K. Mishra

Wiley

Physics and Astronomy; Materials Science; Mathematics; Computer Science; Engineering

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