Related Experiment Video
Updated: Dec 27, 2025
09:23
Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
Published on: May 30, 2014
14.9K
Characterizing photon number statistics using conjugate optical homodyne detection
Optics Express
|March 4, 2020
Summary
Researchers can determine photon number statistics of quantum states using optical homodyne detection. This method recovers statistics from repeated measurements without phase scanning, utilizing expectation maximization and Bayesian inference.
Area of Science:
- Quantum optics
- Quantum information science
Background:
- Characterizing quantum states is crucial for quantum information processing.
- Photon number statistics provide key information about quantum states.
Purpose of the Study:
- To develop a method for determining photon number statistics of unknown quantum states.
- To quantify information gain in single-shot measurements.
Main Methods:
- Utilizing conjugate optical homodyne detection.
- Applying expectation maximization and Bayesian inference algorithms.
- Performing experiments on weak coherent and thermal states.
Main Results:
- Photon number statistics can be recovered from repeated measurements without phase scanning.
- Information gain in single-shot measurements was quantified.
- Experimental demonstration on weak coherent and thermal states.
Conclusions:
- The proposed method reliably reconstructs photon number statistics.
- This technique offers a practical approach for quantum state characterization.
Related Concept Videos
01:16IR Spectroscopy: Hooke's Law Approximation of Molecular Vibration
2.6K
A covalently bonded heteronuclear diatomic molecule can be modeled as two vibrating masses connected by a spring. The vibrational frequency of the bond can be expressed using an equation derived from Hooke's law, which describes how the force applied to stretch or compress a spring is proportional to the displacement of the spring. In this case, the atoms behave like masses, and the bond acts like a spring.
According to Hooke's law, the vibrational frequency is directly proportional to...
According to Hooke's law, the vibrational frequency is directly proportional to...
2.6K
01:32UV–Vis Spectroscopy of Conjugated Systems
8.1K
Organic compounds with conjugated double bonds show strong absorption features in the UV–visible region of the electromagnetic spectrum attributed to π → π* electronic excitations. Generally, a UV–vis absorption spectrum is recorded as a plot of absorbance vs wavelength. The wavelength of maximum absorbance, which manifests as a peak in the absorption spectrum, is denoted as λmax.
One of the factors influencing λmax is the extent of conjugation in...
One of the factors influencing λmax is the extent of conjugation in...
8.1K
02:26Photoelectric Effect
38.4K
When light of a particular wavelength strikes a metal surface, electrons are emitted. This is called the photoelectric effect. The minimum frequency of light that can cause such emission of electrons is called the threshold frequency, which is specific to the metal. Light with a frequency lower than the threshold frequency, even if it is of high intensity, cannot initiate the emission of electrons. However, when the frequency is higher than the threshold value, the number of electrons ejected...
38.4K