Pereira Bezerra, I.
, Vasconcelos, H.
and Glancy, S.
(2022),
Quadrature Squeezing And Temperature Estimation From The Fock Distribution, Quantum Information Processing, [online], https://doi.org/10.1007/s11128-022-03677-5, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=933432
(Accessed April 23, 2024)
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Quadrature Squeezing And Temperature Estimation From The Fock Distribution
Published
Author(s)
Italo Pereira Bezerra, Hilma Vasconcelos,
Abstract
We present a method to estimate the amount of squeezing and temperature of a single-mode Gaussian harmonic oscillator state based on the weighted least squares estimator applied to measured Fock state populations. Squeezing and temperature, or equivalently the quadrature variances, are essential parameters states used in various quantum communication and sensing protocols. They are often measured with homodyne-style detection, which requires a phase reference such as a local oscillator. Our method allows estimation without a phase reference, by using for example a photon-number-resolving detector. To evaluate the performance of our estimator, we simulated experiments with different values of squeezing and temperature. From 10,000 Fock measurement events we estimates states whose fidelities to the true state are greater than 99.99 % for small squeezing (r<1.0), and for high squeezing (r=2.5) we obtain fidelities greater than 99.9 %. We also report confidence intervals and their coverage probabilities.Citation
Quantum Information Processing
Volume
21
Pub Type
Journals
Download Paper
Keywords
quantum optics, quantum squeezing, quantum tomography
Citation
Created November 3, 2022, Updated May 3, 2023